Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

Glossary on Reed Switches, Reed Sensors and Magnets

Reed Switch Glossary

We have added an alphabetical list of Glossary terms used in the Reed Switch and Reed Sensor business. Clicking the alphabets bar will display relevant terms accordingly, and linking to the appropriate term pages will give more information and added information from other third party sources as well.

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  • a
  • AC
    Alternating Current or AC is a type of flow of electric charge which periodically reverses direction. Example mains supply. Read More
  • Actuation Time
    The time interval, measured in ms, from coil energization, to the closing of a normally open reed contact. Read More
  • Aging
    Buzzing is a process by which a batch of reed switches are operated mechanically at high speeds with no load, inside a coil. Read More
  • AlNiCo
    AlNiCo is a type of permanent magnet which is made from an alloy of Aluminium, Nickel, Cobalt and Iron. Read More
  • Alternating Current
    Alternating Current or AC is a type of flow of electric charge which periodically reverses direction. Example mains supply. Read More
  • Ampere-Turn
    Ampere-turn or AT is the SI unit of magneto-motive force and is a direct measure of a reed contact's magnetic sensitivity. Read More
  • Ampere-Turn/Metre
    Ampere-turn/metre is the SI unit of coercivity. The equivalent CGS system unit is Oersted, and 1 AT/m = 4π/1000 Oersteds. Read More
  • Annealing
    Annealing is a process of heating a material quickly and cooling it down slowly, in order to reduce internal stress. Read More
  • antiferromagnetic
    Anti-ferro-magnetism is a phenomenon by which a magnetic field creates parallel but opposing spins and varies with temperature. Read More
  • Anti-ferro-magnetism
    Anti-ferro-magnetism is a phenomenon by which a magnetic field creates parallel but opposing spins and varies with temperature. Read More
  • Arc Suppression
    Contact Protection circuits are simple circuits that suppress in-rush current generated by Inductive or Capacitive loads. Read More
  • Arcing
    Arcing is the discharge of current that jumps a gap in a circuit or between two electrodes or opposite polarity. Read More
  • Armature
    A Reed blade, is one of the two flattened parts that form the cantilever and current carrying parts of a reed switch. Read More
  • b
  • Back EMF
    Back EMF is the voltage that occurs where there is relative motion between the armature and the magnetic field from the motor. Read More
  • Bake-out
    Bakeout is a process by which parts are exposed to heat in a controlled atmosphere to release surface impurities. Read More
  • Bakeout
    Bakeout is a process by which parts are exposed to heat in a controlled atmosphere to release surface impurities. Read More
  • Bi-stable
    A Bi-stable is an electronic circuit that has two stable states. Latching type of reed contacts are bi-stable. Read More
  • Bias
    A bias is a permanent magnet placed very near a normally open reed contact to oppose or aid its operation. Read More
  • Bifilar Winding
    A Bifilar winding is a coil with two wires are wound simultaneously with the turns of each winding being contiguous. Read More
  • bistable
    A Form E type or latching, or bi-stable type of reed contact, stays in the last energized state. A magnet of opposite polarity changes its state. Read More
  • Bounce
    Bounce is the period during which reed blades make multiple closures intermittently before providing full unbroken contact. Read More
  • Bounce Time
    Bounce Time of a reed contact, measured in ms, is the time taken for to bounce before providing full unbroken contact. Read More
  • Break
    Release or Break is defined as the opening of closed contacts. Release of Reed contacts is measured in Ampere-Turns. Read More
  • Break Before Make
    A Form C type or Break before Make type of reed contact is a change-over type of contact having three leads. Read More
  • Breakdown Voltage
    Breakdown Voltage, measured in Volts, is the voltage which may be applied across the leads of a reed contact without causing arcing, breakdown, or leakage. Read More
  • Bridging
    Bounce is the period during which reed blades make multiple closures intermittently before providing full unbroken contact. Read More
  • Buzzing
    Buzzing is a process by which a batch of reed switches are operated mechanically at high speeds with no load, inside a coil. Read More
  • c
  • Cadmium
    Cadmium is a a soft bluish-white metal, is chemically similar to Zinc and Mercury, and is toxic. It is banned under RoHS. Read More
  • Capacitance
    Capacitance is the ability of a system to store an electric charge, and is expressed in Farads. Read More
  • Capacitive Load
    A capacitive load is a type of load that contain little resistance or inductance and mostly capacitance. for example motors. Read More
  • Carry Current
    Carry Current of a reed contact, measured in Amperes, is the maximum current that can be applied to an already closed contact. Read More
  • CGS
    CGS is an acronym for the Centimeter-Gram-Second system of units. It has been superseded by SI units. Read More
  • Chatter
    Bounce is the period during which reed blades make multiple closures intermittently before providing full unbroken contact. Read More
  • Close differential
    Close Differential or Low Differential is the term used to denote a reed contact with a differential of minimum 70%. Read More
  • Coercivity
    Coercivity is the demagnetization force required to reduce polarization or induction of a magnetic material to zero. Read More
  • Coil
    Test Coil is an assembly consisting of one or more windings on a bobbin and is used to measure the AT of a reed contact. Read More
  • Contact Dwell
    Dwell of a change-over contact, is the difference, in AT, between the closing of the NO contact and the opening of the NC contact. Read More
  • Contact Force
    Contact force is the force between the overlapping part of the two reed blades of a reed switch in actuated, closed condition. Read More
  • Contact Gap
    Contact gap, measured in microns, is the distance between the mating reed blades of a Reed Switch in open state. Read More
  • Contact Noise
    Contact Noise is the irregular fluctuations that accompany a transmitted electrical signal that are not part of it . Read More
  • Contact Protection
    Contact Protection circuits are simple circuits that suppress in-rush current generated by Inductive or Capacitive loads. Read More
  • Contact Rating
    Contact Rating, in Watts, is the maximum power a reed contact can switch. Loads other than resistive will require contact protection. Read More
  • Contact Resistance
    Contact Resistance measured in milli-ohms, is the electrical resistance of a reed contact in closed state, measured across leads. Read More
  • Copper
    Copper is an element with symbol Cu and atomic number 29. It is used in cladding reed switches for radio frequency applications. Read More
  • Counter Electromotive Force
    Back EMF is the voltage that occurs where there is relative motion between the armature and the magnetic field from the motor. Read More
  • CR
    Contact Resistance measured in milli-ohms, is the electrical resistance of a reed contact in closed state, measured across leads. Read More
  • Curie Temperature
    Curie Temperature is the temperature above which a Ferro-magnetic material loses its Ferro-magnetism and becomes Para-magnetic. Read More
  • d
  • DC
    Direct Current or DC is a type of flow of electric charge which is only in one direction. It is used for example, in batteries. Read More
  • DCR
    Dynamic Contact Resistance measured in milli-ohms, is the electrical resistance of closed contacts, when the contact is in continuous operation under load. Read More
  • Degreasing
    Degreasing is a surface finishing process for surface cleansing of metal parts using solvents in vapor form. Read More
  • Delta Contact Resistance
    Variable Contact Resistance is the difference between the lowest and the highest Contact Resistance of multiple readings. Read More
  • Dia-magnetic
    Dia-magnetism is a phenomenon exhibited by materials such as Copper, that become magnetized in a magnetic field. Read More
  • Dia-magnetism
    Dia-magnetism is a phenomenon exhibited by materials such as Copper, that become magnetized in a magnetic field. Read More
  • Dielectric Strength
    Breakdown Voltage, measured in Volts, is the voltage which may be applied across the leads of a reed contact without causing arcing, breakdown, or leakage. Read More
  • Differential
    Differential of a reed contact, measure in AT is the difference between it operate AT and its release AT. Read More
  • DIP
    A Dual Inline Package is a chip or device package that contains two rows of connection pins that can be soldered. Read More
  • Direct Current
    Direct Current or DC is a type of flow of electric charge which is only in one direction. It is used for example, in batteries. Read More
  • Drop-out Range
    Release Range or Drop-out Range is the range of available or possible release AT values for a reed switch or reed sensor. Read More
  • Dual Inline Package
    A Dual Inline Package is a chip or device package that contains two rows of connection pins that can be soldered. Read More
  • e
  • Electro-magnet
    An Electro-magnet is an assembly consisting of a coil on a soft metal core, that exhibits magnetism when energized. Read More
  • Electro-motive Force
    Electro-motive Force or EMF, is a measure of the energy that causes current to flow through a circuit. Read More
  • Electro-static Discharge
    Electro-static discharge is the release of static electricity when two objects come into contact. Read More
  • Electromagnetic Coil
    Test Coil is an assembly consisting of one or more windings on a bobbin and is used to measure the AT of a reed contact. Read More
  • Electroplating
    Electroplating or Plating is a process of depositing a thin coating of metal on a conductive surface. Read More
  • EMF
    Electro-motive Force or EMF, is a measure of the energy that causes current to flow through a circuit. Read More
  • Encapsulation
    Potting or encapsulation is a process of filling a housing with an electronic assembly with a compound that sets after curing, for resistance to shock and vibration, and for exclusion of moisture and corrosive agents. Read More
  • ESD
    Electro-static discharge is the release of static electricity when two objects come into contact. Read More
  • f
  • Ferri-magnetic
    Ferri-magnetism is a phenomenon exhibited by Ferrites, for example, having parallel but opposite alignment of neighboring atoms. Read More
  • Ferri-magnetism
    Ferri-magnetism is a phenomenon exhibited by Ferrites, for example, having parallel but opposite alignment of neighboring atoms. Read More
  • Ferrite
    A Ferrite is a type of compound that exhibits magnetic properties and is made from ceramic compounds derived from Iron Oxides. Read More
  • ferro-magnetic
    Ferro-magnetism is a phenomenon where materials like Iron, tend to become magnetized in the presence of an external magnetic field. Read More
  • Ferro-magnetism
    Ferro-magnetism is a phenomenon where materials like Iron, tend to become magnetized in the presence of an external magnetic field. Read More
  • Ferrofluid
    A Ferrofluid, is a liquid that becomes strongly magnetized in the presence of a magnetic field. Read More
  • Float Switch
    A Float Switch is an assembly of a reed contact and an external magnet encapsulated in a foamed float, to sense a fluid level. Read More
  • Flow Meter
    A Flow Sensor is a device used to quantify the volume of fluid passing through a point in a pipe. Read More
  • Flow Sensor
    A Flow Sensor is a device used to quantify the volume of fluid passing through a point in a pipe. Read More
  • Flow Switch
    A flow switch is a mechanical switch that changes state in the presence or absence of flow of fluid through it. Read More
  • Form A
    A Form A or Normally Open type of contact stays in an "open" state until actuated with an external magnet or coil. Read More
  • Form A
    A normally open or NO type of contact is one that normally does not allows electricity to flow until it is signaled to close. Read More
  • Form B
    A normally closed or NC type of electrical contact is one that normally allows electricity to flow until it is signaled to open. Read More
  • Form B
    A Form B or normally closed type of reed contact stays in a closed state until actuated with an external magnet or coil. Read More
  • Form C
    A Form C type or Break before Make type of reed contact is a change-over type of contact having three leads. Read More
  • Form D
    A Form D or Make Before Break type of reed contact is a change-over type of contact having three leads. Read More
  • Form E
    A Form E type or latching, or bi-stable type of reed contact, stays in the last energized state. A magnet of opposite polarity changes its state. Read More
  • Four-terminal Sensing
    Kelvin Sensing uses separate pairs of current-carrying and voltage-sensing electrodes to make more accurate measurements. Read More
  • g
  • Gauss
    Gauss is the CGS unit of magnetic induction. The equivalent SI unit is Tesla, and 1 Gauss = 10^-4 Tesla. Read More
  • Gilbert
    Gilbert is the CGS unit of magneto-motive force. The equivalent SI unit is Ampere-turn, and 1 Gilbert = 10/4π or 0.7958 AT. Read More
  • Glass to Metal Seal
    Glass to metal seals are what intimately and hermetically seal metal parts within a glass housing or tube. Read More
  • Gold
    Gold is a soft yellow metal and is sometimes used as an under-layer in reed switches, but can cause some sticking. Read More
  • h
  • Hall Effect Sensor
    A Hall Effect Sensor is a transducer which varies its output voltage in response to changes in an external magnetic field. Read More
  • Hard Ferrite
    A Hard Ferrite is a type of Ferrite where magnetism is inherent in it, and does not require an external field to stay magnetized. Read More
  • Helmholtz Coil
    A Helmholtz coil is a device named after a German scientist, for producing a region of nearly uniform magnetic field. Read More
  • Hermetic
    Hermetic describes a type of closure or seal that is complete and airtight and isolated from the atmosphere. Read More
  • Hexavalent Chromium
    Hexavalent chromium refers to chemical compounds of Chromium in the +6 oxidation state that is recognized as a human carcinogen. Read More
  • Homogenous Materials
    A homogeneous material is defined as either a raw material or a material applied during the construction of a product. Read More
  • Hysteresis
    Differential of a reed contact, measure in AT is the difference between it operate AT and its release AT. Read More
  • i
  • Incremental Resistance
    Dynamic Contact Resistance measured in milli-ohms, is the electrical resistance of closed contacts, when the contact is in continuous operation under load. Read More
  • Inductive Load
    An inductive load is type of load made of wound or coiled wire, for example transformers or coils, that causes inrush current. Read More
  • Inert Gas
    An inert gas is one which does not react with other elements, for example Noble gases and Nitrogen. Read More
  • Inrush Current
    Inrush Current or Surge Current, is the maximum instantaneous input current drawn by a device when first turned on. Read More
  • Insulation Resistance
    Insulation resistance, measured in Ohms, is the electrical resistance measured between open terminals of a reed contact. Read More
  • Internet of Things
    The Internet of Things, or IoT, refers to physical objects that require an IP address, and collect information for a service. Read More
  • IoT
    The Internet of Things, or IoT, refers to physical objects that require an IP address, and collect information for a service. Read More
  • Iridium
    Irridium is a a very dense, hard, brittle, silvery-white metal and is sometimes used as a contact material in reed switches. Read More
  • k
  • Kelvin Sensing
    Kelvin Sensing uses separate pairs of current-carrying and voltage-sensing electrodes to make more accurate measurements. Read More
  • l
  • Lamp Load
    A lamp load is a type of load that generates Inrush current when lighting up. Reed Switches need protection for such loads. Read More
  • latching
    A Bi-stable is an electronic circuit that has two stable states. Latching type of reed contacts are bi-stable. Read More
  • LED
    A Light Emitting Diode or LED, is a semiconductor device that emits light when an electrical current is passed through it. Read More
  • Level Switch
    A Float Switch is an assembly of a reed contact and an external magnet encapsulated in a foamed float, to sense a fluid level. Read More
  • Level Transducer
    A Level Sensor is an assembly that is a PCB assembly fitted inside a tank, consisting of multiple reed switches and resistors. Read More
  • Level Sensor
    A Level Sensor is an assembly that is a PCB assembly fitted inside a tank, consisting of multiple reed switches and resistors. Read More
  • Life Test
    A Life Test is the process of testing a product by subjecting it to conditions in excess of its normal service parameters in an effort to uncover faults. Read More
  • Light Emitting Diode
    A Light Emitting Diode or LED, is a semiconductor device that emits light when an electrical current is passed through it. Read More
  • Line Voltage
    Alternating Current or AC is a type of flow of electric charge which periodically reverses direction. Example mains supply. Read More
  • Line Voltage
    Line Voltage is the potential difference between line and neutral phases of a three phase Mains Electricity AC supply. Read More
  • Low Differential
    Close Differential or Low Differential is the term used to denote a reed contact with a differential of minimum 70%. Read More
  • Low Hysteresis
    Close Differential or Low Differential is the term used to denote a reed contact with a differential of minimum 70%. Read More
  • m
  • Magnet
    A Magnet is a type of material, primarily of an Iron alloy, that has its component atoms so ordered, that it exhibits magnetism. Read More
  • Magnet Performance
    Maximum Energy Product or BHmax of a magnet, is the product of its B Field and H field and is a measure of it strength. Read More
  • Magnet Sensor
    A Magnet Sensor is a device that uses a reed switch, and is encapsulated in a housing for easy mounting or clamping. Read More
  • Magnetic Induction
    Magnetic Flux is a measure of the strength of a magnetic field over a given area, and is expressed in Weber. Read More
  • Magnetic Shunt
    A Magnetic Shield or a Shunt, is a material of high magnetic permeability, that is used to protect circuits from external magnetic fields. Read More
  • Magnetic Field Strength
    Magnetic Field Strength is the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow. Read More
  • Magnetic Flux
    Magnetic Flux is a measure of the strength of a magnetic field over a given area, and is expressed in Weber. Read More
  • Magnetic Ordering Temperature
    Magnetic Ordering Temperature is the temperature above which a Ferri-magnetic material becomes Para-magnetic. Read More
  • Magnetic Permeability
    Magnetic Permeability is the ability of a material to get magnetized and hold magnetism in the presence of a magnetic field. Read More
  • Magnetic Saturation
    Magnetic saturation exists when an increase of magnetization applied to a reed contact does not increase the magnetic flux through. Read More
  • Magnetic Shield
    A Magnetic Shield or a Shunt, is a material of high magnetic permeability, that is used to protect circuits from external magnetic fields. Read More
  • Magneto-motive Force
    Magneto-motive force is a quantity representing the line integral of the magnetic intensity around a closed line. Read More
  • Make
    Operate or Make is defined as the closing of open contacts. The operate of a reed contact is measured in Ampere-Turns. Read More
  • Make Before Break
    A Form D or Make Before Break type of reed contact is a change-over type of contact having three leads. Read More
  • Maximum Switching Power
    Contact Rating, in Watts, is the maximum power a reed contact can switch. Loads other than resistive will require contact protection. Read More
  • Maximum Energy Product
    Maximum Energy Product or BHmax of a magnet, is the product of its B Field and H field and is a measure of it strength. Read More
  • Maxwell
    Maxwell is the CGS system unit of magnetic flux. The equivalent SI unit is Weber, and 1 Maxwell = 10^-8 Webers. Read More
  • Mercury
    Mercury is a heavy, silvery metal that is liquid at room temperature and atmospheric pressure, and when ingested, is poisonous. Read More
  • Mercury Switch
    A Tilt Switch is a reed switch based device which gives out a signal at a pre-defined tilt angle. Read More
  • MGOe
    MegaGauss-Oersted is the CGS unit of the Maximum Energy product (BHmax) of a magnet, which is a measure of stored energy. Read More
  • MKS
    The MKS is a physical system of units that expresses any given measurement using the Metre, Kilogram, and/or Second. Read More
  • Molybdenum
    Molybdenum is a silvery white metal used as a contact material in reed switches for switching high current loads. Read More
  • n
  • NC
    A normally closed or NC type of electrical contact is one that normally allows electricity to flow until it is signaled to open. Read More
  • NdFeB
    NdFeB is a rare-earth magnet made from an alloy of Neodymium, Iron and Boron to form the Nd2Fe14B tetragonal structure. Read More
  • Normally Closed
    A Form B or normally closed type of reed contact stays in a closed state until actuated with an external magnet or coil. Read More
  • Normally Open
    A Form A or Normally Open type of contact stays in an "open" state until actuated with an external magnet or coil. Read More
  • Normally Closed
    A normally closed or NC type of electrical contact is one that normally allows electricity to flow until it is signaled to open. Read More
  • Normally Open
    A normally open or NO type of contact is one that normally does not allows electricity to flow until it is signaled to close. Read More
  • o
  • OAT
    Operate Ampere-Turn, also known as Pull-in, is a measure in Ampere-turns, of the point at which a reed contact opens. Read More
  • Oersted
    Oersted is the CGS system unit of magnetic field strength. The equivalent SI unit is Ampere-turn/metre. Read More
  • Omni-polar
    An omni-polar device is a component that can fully function with either pole of a magnet. It is not polarity sensitive. Read More
  • Operate
    Operate or Make is defined as the closing of open contacts. The operate of a reed contact is measured in Ampere-Turns. Read More
  • Operate AT
    Operate Ampere-Turn, also known as Pull-in, is a measure in Ampere-turns, of the point at which a reed contact opens. Read More
  • Operate Range
    Operate Range or Pull-in Range is the range of available or possible operate AT values for a reed switch or a reed sensor. Read More
  • Operate Time
    The time interval, measured in ms, from coil energization, to the closing of a normally open reed contact. Read More
  • Operating Frequency
    Operating Frequency of a reed contact, measured in Hertz (Hz), is the maximum speed at which it can be operated. Read More
  • Operating Temperature
    The temperature limit over which a reed contact or magnet will cease to meet specified operating parameters. Read More
  • Over-drive
    Over-drive, is the extra Ampere-turn applied to a reed contact after closure, before measurement of Contact Resistance. Read More
  • p
  • Palladium
    Palladium is a rare silvery-white metal and is sometimes plated as an under layer in reed switches. Read More
  • para-magnetic
    Para-magnetism is exhibited by materials that tend to become magnetized when a magnetic field is present, but lose it when absent. Read More
  • Para-magnetism
    Para-magnetism is exhibited by materials that tend to become magnetized when a magnetic field is present, but lose it when absent. Read More
  • PCB
    A Printed Circuit Board is a thin board made of a laminate material on which conductive pathways are etched or "printed". Read More
  • Plating
    Electroplating or Plating is a process of depositing a thin coating of metal on a conductive surface. Read More
  • Polarity Sensitive
    Polarity sensitive devices are those which require only a specific polarity of magnet to get them to change state. Read More
  • Potting
    Potting or encapsulation is a process of filling a housing with an electronic assembly with a compound that sets after curing, for resistance to shock and vibration, and for exclusion of moisture and corrosive agents. Read More
  • Pressing
    Pressing or Stamping is a process by which metals in the shape of wires or sheets are formed using a tool or a die. Read More
  • Printed Circuit Board
    A Printed Circuit Board is a thin board made of a laminate material on which conductive pathways are etched or "printed". Read More
  • Proximity Sensor
    A Magnet Sensor is a device that uses a reed switch, and is encapsulated in a housing for easy mounting or clamping. Read More
  • Pull-in Range
    Operate Range or Pull-in Range is the range of available or possible operate AT values for a reed switch or a reed sensor. Read More
  • r
  • RAT
    Release AT, also known as Drop-out, is a measure in Ampere-turns, of the point at which a reed contact opens. Read More
  • Re-closure
    Re-closure of a reed contact, measured in AT, is the second closure which occurs after further magnetic energization of an already open, NC reed contact. Read More
  • Reed Blade
    A Reed blade, is one of the two flattened parts that form the cantilever and current carrying parts of a reed switch. Read More
  • Contact
    Contact is the current-carrying parts of a reed contact that engage or disengage to close or open electrical circuits. Read More
  • Reed Relay
    A Reed Relay is a device having single or multiple Reed Switches within a coil that help switch higher loads. Read More
  • Reed Sensor
    A reed sensor is a device using a reed switch, having additional functionality such as improved shock resistance, etc. Read More
  • Reed Switch
    A reed switch is a passive device consisting of two reed blades sealed inside a glass tube, that operates when brought near a magnet. Read More
  • Release
    Release or Break is defined as the opening of closed contacts. Release of Reed contacts is measured in Ampere-Turns. Read More
  • Release AT
    Release AT, also known as Drop-out, is a measure in Ampere-turns, of the point at which a reed contact opens. Read More
  • Release Range
    Release Range or Drop-out Range is the range of available or possible release AT values for a reed switch or reed sensor. Read More
  • Release Time
    Release time of a reed contact, measured in ms, is the time interval from coil de-energization to the opening or change over. Read More
  • Remanence
    Remanence is the magnetization left behind in a ferro-magnetic material after an external magnetic field is removed. Read More
  • Resistive Load
    A Resistive Load is a type of load that contains no inductance or capacitance, for example, incandescent light bulbs. Read More
  • Resonant Frequency
    Resonance frequency of a reed contact, measured in Hertz, is the maximum operating frequency that a reed contact can withstand. Read More
  • Rhodium
    Rhodium is a hard silvery-white metal having resistance to corrosion, and is used as a contact material in reed switches. Read More
  • RoHS
    RoHS or Restriction of Hazardous Substances, originated in the EU and restricts the use of specific hazardous materials. Read More
  • Ruthenium
    Ruthenium is a a hard silvery-white metal having a high melting point and excellent wear resistance. Read More
  • s
  • Saturation
    Magnetic saturation exists when an increase of magnetization applied to a reed contact does not increase the magnetic flux through. Read More
  • Shielded Cable
    A shielded cable is one with one or more cables inside, enclosed by a layer that shields the cables from external electrical noise. Read More
  • Shock Resistance
    Shock resistance of a reed contact, is the acceleration limit and sine-wave duration in milli-seconds that an open reed contact can withstand without changing state. Read More
  • SI
    SI is an acronym for Système International d'Unités or the International System of units which is the Metric System. Read More
  • Silver
    Silver is a soft, white, transition metal having the highest electrical and thermal conductivity of any metal. Read More
  • Single Inline Package
    A Single Inline Package or SIP is a chip or device package that contains only a single row of connection pins that are soldered. Read More
  • Single Pole Double Throw
    A Single Pole Double Throw switch is a type of that has a single input and can connect to a dual outputs. Read More
  • Single Pole Single Throw
    A Single Pole Single Throw switch is a type of switch that has a single input and can connect to a single output. Read More
  • SIP
    A Single Inline Package or SIP is a chip or device package that contains only a single row of connection pins that are soldered. Read More
  • SmCo
    SmCo is a rare earth magnet made from an alloy of Samarium and Cobalt to form SmCo5 or Sm2Co17 compounds. Read More
  • SMD
    A Surface-mount Device is an electronic component that mounts on the surface of a printed circuit board. Read More
  • SMT
    Surface-mount Technology is a design standard for electronic circuits where components are mounted directly onto the surface of a PCB. Read More
  • Soft Ferrite
    A Soft Ferrite is a type of Ferrite where permanent magnetism is not inherent, and requires an external field to magnetize it. Read More
  • Soldering
    Soldering is the process of joining two or more metals together by melting and flowing a filler metal with a lower melting point. Read More
  • Soldering Dwell
    Dwell time during soldering, is the amount of time a component's lead is in contact with a solder wave or the tip of a hand soldering Iron. Read More
  • SPDT
    A Single Pole Double Throw switch is a type of that has a single input and can connect to a dual outputs. Read More
  • SPST
    A Single Pole Single Throw switch is a type of switch that has a single input and can connect to a single output. Read More
  • Sputtering
    Sputtering is a process that uses ions of an inert gas to dislodge atoms from the surface of a target, and have them deposited on a substrate. Read More
  • Stamping
    Pressing or Stamping is a process by which metals in the shape of wires or sheets are formed using a tool or a die. Read More
  • Static Contact Resistance
    Static contact resistance, measured in milli-ohms, is the electrical resistance of a reed contact in closed state. Read More
  • Surface-mount Device
    A Surface-mount Device is an electronic component that mounts on the surface of a printed circuit board. Read More
  • Surface-mount Technology
    Surface-mount Technology is a design standard for electronic circuits where components are mounted directly onto the surface of a PCB. Read More
  • Surge Current
    Inrush Current or Surge Current, is the maximum instantaneous input current drawn by a device when first turned on. Read More
  • Switching Current
    Switching current of a reed contact, measured in Amperes, is the maximum current a reed contact can switch. Read More
  • Switching Frequency
    Switching frequency, measured in Hertz (Hz), is the maximum frequency at which a reed contact can operate with no loss in pulses. Read More
  • Switching Voltage
    Switching voltage of a reed contact, measured in volts, is the maximum voltage a reed contact can switch. Read More
  • t
  • Tesla
    Tesla is the SI unit of magnetic flux density. The equivalent CGS system unit is Gauss, and 1 Tesla = 10^4 Gauss. Read More
  • Test Coil
    Test Coil is an assembly consisting of one or more windings on a bobbin and is used to measure the AT of a reed contact. Read More
  • Thermal EMF
    The EMF generated by a reed contact when the reed contact unit is subjected to a temperature differential. Read More
  • Thermal Ferrite
    A Thermal Ferrite is special Ferrite compound which changes from being Ferro-magnetic to Para-magnetic, at its Curie Point. Read More
  • Thermal Reed Switch
    A Thermal Reed Switch is an assembly consisting of a Reed Switch, a Thermal Ferrite and magnets that can sense a set temperature. Read More
  • Tilt Switch
    A Tilt Switch is a reed switch based device which gives out a signal at a pre-defined tilt angle. Read More
  • Tin
    Tin is a chemical element with symbol Sn (Stannum in Latin) and atomic number 50. It is used on Reed Switch leads. Read More
  • Tungsten
    Tungsten is a hard metal which is used as a contact material in reed switches due to its resistance to damage by arcing. Read More
  • u
  • Ultrasonic Welding
    Ultrasonic Welding is the process of joining two plastic work pieces by using high frequency acoustic vibrations Read More
  • v
  • Vacuum Deposition
    Vacuum Deposition is process of depositing a thin film under vacuum or a low-pressure plasma environment on a substrate. Read More
  • Variable Contact Resistance
    Variable Contact Resistance is the difference between the lowest and the highest Contact Resistance of multiple readings. Read More
  • VCR
    Variable Contact Resistance is the difference between the lowest and the highest Contact Resistance of multiple readings. Read More
  • Vibration Resistance
    Vibration resistance of a reed contact, is the acceleration level and frequency range that an open or closed reed contact can withstand without changing state. Read More
  • w
  • Weber
    Weber is the SI unit of magnetic flux. The equivalent CGS system unit is Maxwell, and 1 Weber = 10^8 Maxwell. Read More
  • Welding
    Welding is the process of joining two metals or plastics by heating the surfaces to the point of melting, and uniting them. Read More