Sub Miniature Reed Switch, SM-1322
Features
Release AT Configurable. Ruthenium contact. 14.0 mm Glass length. Normally Open. Inert gas filled. 4 types of Lead Formations.
Benefits
Omni-polar. Does not require power for operation. Sputtered Contact. RoHS Compliant. Not ESD Sensitive.
📝Description
The SM-1322 Sub Miniature Reed Switch, designed in a Form A configuration, features a robust 2.25 mm diameter glass with enhanced wall thickness, ensuring superior glass-to-metal seals. This construction makes it particularly well-suited for general-purpose applications in high-volume settings where minimal shock and vibration tolerance are essential, such as in toys and other consumer electronics. Its center contact design further extends its utility, making it suitable for coil applications where reliability in electrical contact is paramount.
To accommodate diverse application needs, this sub miniature reed switch offers three distinct Release AT ranges, providing flexibility to match specific operational requirements. For applications requiring higher voltage handling capabilities, a specially sputtered contact variant is available, optimized for switching up to 230 VAC line voltages, ensuring safe and efficient operation in varied electrical environments.
In terms of assembly and integration, the cropped version of the SM-1322 is tailored for compact installations within smaller plastic housings, offering ease of integration through direct soldering onto cables. For PCB-based applications, the SMD version supports reflow soldering processes, facilitating efficient and reliable integration onto surface-mount technology boards. Additionally, vertical and horizontal mount versions cater to through hole PCB configurations, providing flexibility in installation orientation based on specific project requirements.
These versatile features collectively position the SM-1322 Sub Miniature Reed Switch as a dependable choice across industries such as consumer electronics, automotive components, and industrial controls. Its combination of robust design, flexible contact configurations, and adaptable mounting options ensures consistent performance and reliability in demanding applications, meeting the stringent standards of modern electronic devices and systems.
Magnets for Actuating Reed Switches and Reed Sensors
 |
Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized
Continue reading
Sep 3, 2024 |
Actuation Distances for SM-1322 Reed Switches
 |
For easy selection of AT band and Magnet for an application, we offer Actuation distances for the SM-1322 Sub Miniature Reed Switch in
Continue reading
Sep 3, 2024 |
⚡️Electrical
| Contact Form | A | |
| Contact Rating (max) | W/VA | 10.0 |
| Switching Current (max) | A | 0.5 |
| Carry Current (max) | A | 1.50 |
| DC Switching Voltage (max) | VDC | 180 |
| AC Switching Voltage (max) | VAC | 130 |
| Breakdown Voltage (min) | VDC | 200 |
| Contact Resistance (max) | mΩ | 150 |
| Insulation Resistance (min) | Ω | 1011 |
| Capacitance (typ) | pF | 0.2 |
📊Miscellaneous
| Operate Time (max) | ms | 0.50 |
| Bounce Time (max) | ms | 0.15 |
| Release Time (max) | ms | 0.15 |
| Resonance Frequency (typ) | Hz | >2000 |
| Operating Frequency (max) | Hz | 500 |
| Operating Temperature | °C | -40 to +200 |
| Shock Resistance (½Sin wave for 11ms) | G | 50 |
| Vibration Resistance (10-2000Hz) | G | 20 |
| Test Coil Number | 717 102 002 |
⚙️Ordering Code
SM-1322-(Release AT Code)-(Operate Band)-(Formation Code)
| Release AT Code | L | M | H | |
| Operate Band | AT | 10-40 | 10-40 | 10-40 |
| Corresponding Release Band | AT | 4-20 | 6-25 | 7.5-30 |
| Formation Code | Lead Type |
| Full Length Leads | |
| C | Cropped |
| S | SMD |
| H | Horizontal Mount |
| V | Vertical Mount |
Examples: SM-1322-L-15-19 denotes Low Release in 15-19 Operate Band (AT) with Full Length leads. SM-1322-H-10-15-S denotes High Release AT in 10-15 Operate band (AT) with SMD Formed leads.
Other Special Configurations: Lower Static Contact Resistance, Dynamic Contact Resistance Limit, Higher Insulation Resistance, Special Release Limits, Gold plated leads.
🛠️Usage Notes
Here are some of the recommended usage notes to ensure maximum durability of this Sub Miniature Reed Switch. The complete usage notes are available here.
Ampere Turn Selection for your Application
 |
Selecting the appropriate Ampere Turn (AT) or magnetic sensitivity for a Reed Switch, Reed Sensor, or Magnet Sensor is crucial in any
Continue reading
Jul 24, 2024 |
Handling of Reed Switches
 |
Handling of Reed Switches Reed Switches, Reed Sensors, and Magnet Sensors are delicate devices prone to developing micro cracks in
Continue reading
Jun 17, 2024 |
Soldering of Reed Switches
 |
Soldering Reed Switches and Reed Sensors requires meticulous handling to safeguard these delicate components against inadvertent damage.
Continue reading
Jun 17, 2024 |
Ferro-magnetic Parts
 |
Reed Switches utilize a nickel-iron alloy, sputter coated with additional Ruthenium to render it ferromagnetic while maintaining low
Continue reading
Jun 17, 2024 |
Encapsulation and Potting
 |
Encapsulation Nozzle When potting or encapsulating reed switch assemblies in custom housings, the choice of materials plays a critical
Continue reading
Jun 17, 2024 |
Protection Circuits for Reed Switches
 |
It is assumed that the ideal reed switch load is a Resistive Load, but it is almost impossible to reduce any load to purely resistive.
Continue reading
Jun 17, 2024 |
🧰Applications
Although we can never restrict the use of a reed switch to a particular field, the following is a list of some of the applications that the SM-1322 Sub Miniature Reed Switch is known to perform well.
Treadmill Safety Using Reed Switches
 |
Treadmill safety is important and accidents are a common concern in gyms and home fitness settings, especially when the belt continues
Continue reading
Jul 14, 2025 |
Ice Maker Water Level Monitoring using Reed Sensors
 |
Ice makers—whether standalone units or integrated into refrigerators—require a steady water supply to ensure ice does not run out.
Continue reading
Jun 25, 2025 |
Bowling Alley Pinsetter Positions monitored with Reed Sensors
 |
In bowling alleys, the pinsetter performs two critical movements: the first lifts, straightens, and holds standing pins that were not
Continue reading
Oct 20, 2024 |
Dialysis Machine Flow Rate Sensing Using Reed Sensors
 |
Dialysis machines are life-saving devices used to filter waste and excess fluids from the blood when the kidneys are unable to function
Continue reading
Oct 26, 2024 |
Chill Water Flow Sensing Using Reed Switches
 |
In industrial equipment, such as sputtering machines, maintaining optimal temperatures for critical components is paramount. Specific
Continue reading
Sep 3, 2024 |
Side Stand Sensing on Motorcycles and Two Wheelers
 |
Motorcycles, Scooters and other motorized E-bikes have a side stand and a main stand under the chassis. A quick and easy motion of the
Continue reading
Sep 3, 2024 |
Reed switches and Reed Sensors in Barcode Scanners
 |
Barcode scanners in supermarkets can be clicked on to a docking system that is integrated with the check-out conveyor belt. This helps in
Continue reading
Sep 3, 2024 |
Brake Sensing Using Reed Sensors
 |
Brake sensing in an automobile serves as a critical safety feature, signalling to vehicles behind when the vehicle is slowing down.
Continue reading
Sep 3, 2024 |
Reed Sensors in Automobile Power windows
 |
In modern automobiles, the convenience of raising or lowering power windows is facilitated by buttons located near the seats or on the
Continue reading
Sep 3, 2024 |
Fuel Pumps Use Reed Switches to measure Volume of fuel
 |
Fuel pumps represent inherently hazardous environments where even the slightest error can precipitate a catastrophic fire. Given this
Continue reading
Sep 3, 2024 |
Gear speed and Direction sensing Using Reed Switches
 |
Gear speed and direction sensing is something that's required when operating machinery at high speeds, even in manual mode. In mechanical
Continue reading
Sep 3, 2024 |
Ferrous Metal Detection Sensors are Built with Reed Switches
 |
In heavy machine automation, where the use of magnets is impractical due to the presence of bulky ferromagnetic components, Reed
Continue reading
Sep 3, 2024 |
Electronics Kits Use Reed Switches
 |
Reed switches play a crucial role in numerous electronics kits and hobby projects, serving as fundamental components for exploring
Continue reading
Sep 3, 2024 |
Reed switches and Float switches in Water tank control
 |
Water scarcity is a pressing issue in many urban areas worldwide, emphasizing the importance of efficient water management systems,
Continue reading
Sep 3, 2024 |
Blowers Use Reed Switches to detect drop in Flow-rate
 |
Blowers, also known as centrifugal fans, find extensive application across various fields for air or gas movement, serving purposes
Continue reading
Sep 3, 2024 |
Explosive Areas Need Reed Switches to safely switch Circuits
 |
Explosive areas use special enclosures that are essential components across various industries such as petroleum, gas, chemical, mining,
Continue reading
Sep 3, 2024 |
Door and Window Security in Smart Homes Using Magnet Sensors
 |
Ensuring the security of doors and windows is paramount for homeowners, both when they are away and when they are at home. In modern
Continue reading
Sep 3, 2024 |
Wind Vanes Use Reed Switches for Direction Sensing
 |
A weather vane, a timeless instrument, serves the vital purpose of indicating wind direction. Its simple yet effective design typically
Continue reading
Sep 3, 2024 |
Pressure Gauges are Digitised with Reed Switches
 |
Pressures gauges serve as critical tools for measuring and displaying fluid pressure, indispensable across various industrial and
Continue reading
Sep 3, 2024 |
Anemometers Use Magnet Sensors record Data
 |
Anemometers serve as indispensable tools for measuring wind speed, pivotal in a wide array of applications including weather forecasting
Continue reading
Sep 3, 2024 |
Underwater currents in Lakes measured using Flow Meters
 |
The dynamics of underwater currents in lakes and other aquatic ecosystems are influenced by a multitude of factors, ranging from
Continue reading
Sep 3, 2024 |
Anti-lock braking system (ABS) Use Reed Sensors
 |
The Anti-lock Braking System (ABS) represents a pivotal safety feature utilized not only in vehicles but also in aircraft. In the realm
Continue reading
Sep 3, 2024 |
Fluid level monitoring on Automobiles Using Reed Switches
 |
In today's automobiles, providing comprehensive information on various fluid levels is essential for maintaining vehicle performance and
Continue reading
Sep 3, 2024 |
Dish Washer spray arm jam detection with Reed Sensors
 |
The spray arms of a dish washer move axially in order to clean dishes and cutery by utilizing high pressure hot water and detergent. This
Continue reading
Sep 3, 2024 |
Dish Washer and Washing Machine Fluid Level Sensing
 |
Dish Washer models are equipped with smaller reservoirs for fluids such as detergents which are essential for their continuous operation.
Continue reading
Sep 3, 2024 |
Reed sensors in Telephone Hook and Handsets
 |
Even though the telephone hook was ubiquitous in the 80s and 90s even every home or office, it has been replaced with cellular phones or
Continue reading
Sep 3, 2024 |
Fluid Metering Using Reed Sensors
 |
In many major cities, utility companies or gated communities manage the distribution of piped water and Liquefied Petroleum Gas (LPG) to
Continue reading
Sep 3, 2024 |
Magnet sensors for Tension Monitoring in Coil Winders
 |
Coil Winder Coil Winders help wind bobbins with Copper wire and these bobbins are used in various applications such as in reed relay
Continue reading
Sep 3, 2024 |
Reed switches in Reed Relays for Fax Machines
 |
A Facsimile Machine or Fax Machines enable the transmission of documents over telephone lines. Although these machines gained maximum
Continue reading
Sep 3, 2024 |