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

MM-1018 Micro Miniature Reed Switch

This 10.0 mm long, Form A type Micro Miniature reed switch is designed for moderate power, low load applications. The fast operate time lends itself to high speed switching applications also. This Reed Switch has a cost advantage over the UM-0018 Ultra-miniature series. Leads are flattened for orienting the internal blades to face one way while soldering or welding and the three different Release AT types available, cover a wide range of Release AT specific applications. The cropped version of this Micro Miniature Reed Switch is suitable for smaller plastic housings and can be soldered to cables, the SMD version is suitable for reflow on PCBs, and the vertical and horizontal mount versions are suitable for mounting on through hole PCBs.

  • Drawing of MM-1018 Micro Miniature Reed Switch with Full Length Leads
  • Drawing of MM-1018 Reed Switch with Cropped Leads
  • Drawing showing SMD Formed Leads
  • Drawing Showing Leads formed for Horizontal Mounting
  • Drawing of showing Leads formed for Vertical Mounting


Release AT Configurable. Ruthenium contact. 10.0 mm Glass length. Normally Open. Inert gas filled. 4 types of Lead Formations.



Omni-polar. Does not require power for operation. Sputtered Contact. RoHS Compliant. Not ESD Sensitive.

Cylindrical and Rectangular Magnets

Standard magnets-RRE Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading ->

Nov 18, 2020

Actuation Distances for MM-1018 Reed Switches

MM-1018 actuation distances For easy selection of AT band and Magnet for an application, we offer Actuation distances for the MM-1018 Reed Switch in cropped, SMD, Continue reading ->

Nov 25, 2020


Contact FormA
Contact Rating (max)W/VA10.0
Switching Current (max)A0.5
Carry Current (max)A0.75
DC Switching Voltage (max)VDC100
AC Switching Voltage (max)VAC70
Breakdown Voltage (min)VDC200
Contact Resistance (max)150
Insulation Resistance (min)Ω109
Capacitance (typ)pF0.2


Operate Time (max)ms0.35
Bounce Time (max)ms0.3
Release Time (max)ms0.15
Resonance Frequency (typ)Hz>2000
Operating Frequency (max)Hz500
Operating Temperature°C-40 to +120
Shock Resistance (½Sin wave for 11ms)G30
Vibration Resistance (10-2000Hz)G20
Test Coil Number717 102 003

Ordering Code

MM-1018-(Release AT Code)-(Operate Band)-(Formation code)

Release AT CodeLMH
Operate BandAT10-4010-4010-40
Corresponding Release BandAT4-206-257.5-30
Formation CodeLead Type
Full Length Leads
HHorizontal Mount
VVertical Mount

Examples: MM-1018-L-10-14 denotes Low Release in 10-14 Operate Band (AT) with Full Length leads. MM-1018-H-12-18-S denotes High Release in 12-18 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 MM-1018 Reed Switch. The complete usage notes are available here.

Ampere Turn Selection

Reed Sensor Manufacturer Cross Reference For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or Continue reading ->

Aug 27, 2020

Product Handling

Dropping Reed switch Reed Switch Handling Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro cracks in the glass Continue reading ->

Aug 31, 2020

Manual Soldering

Soldered Reed switch Soldering of Reed Switches and Reed Sensors requires some care to ensure that these delicate devices are not inadvertently damaged. Damage Continue reading ->

Nov 10, 2020

Ferro-magnetic parts

Ferromagnetic parts Reed Switches use an alloy of Nickel and Iron with a few other elements that make the alloy Ferro-magnetic and having a low Remanence. Continue reading ->

Sep 4, 2019

Potting and Encapsulation

Dispensing unit Epoxy dispensing Nozzle When potting or encapsulating reed switch assemblies in custom housings, selection of materials are important. Continue reading ->

Sep 4, 2019

Reed Contact Protection Circuits

Inductive Load Protection Circuit 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 ->

Aug 31, 2020


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 this MM-1018 Micro Miniature Reed Switch is known to perform well.

Reed Sensors in Automobile Power windows

Car power window Automobile Power Window These days, most automobile windows can be raised or lowered using buttons near the seats or on the inside of Continue reading ->

Nov 7, 2020

Reed sensors to control Automobile Sun-roofs

automotive sunroof Automobile Sun Roof An automotive sun-roof, usually made of tinted glass, is a movable panel that can be opened or closed, fully or Continue reading ->

Nov 7, 2020

Magnet sensors in End position sensing in Cylinders and Pistons

Reed switches in pneumatic linear slide Linear Actuator In industrial automation, cost effectiveness is the key to running a successful operation in today's world of Continue reading ->

Nov 7, 2020

Reed switches in Safety Vane applications

conveyor belt Conveyor Vane The automation industry depends on feeding systems which feed parts of different shapes into the assembly machine. The Continue reading ->

Nov 7, 2020

Reed switches in Electronics and Science Kits

Reed switches in science kits Science Kit Reed Switches are used in many electronics and science kits for experimenting on various circuits and scientific phenomena. Continue reading ->

Nov 7, 2020

Reed switches and Reed sensors in Lap counter in slot car racing tracks

Reed switches in lap counter in slot car racing Slot Car Racing Slot car racing (also called slot racing) is a competitive hobby of racing with powered miniature autos which are Continue reading ->

Nov 7, 2020

Reed switches in Model Train Tracks

Reed switches in signal moduling in model train track Model Railway Today modelers create model railway layouts as a hobby, recreating real locations and periods throughout history. Railway Continue reading ->

Nov 7, 2020

Reed switches in LEGO Sensors

Reed switches in LEGO sensor Lego Mindstorms Lego Mindstorms is a hobby kit developed and manufactured by Lego for building programmable robots that use a Continue reading ->

Nov 7, 2020

Reed Switches and Reed Sensors in Digital Fishing Reels

Reed switch usage in electric fishing reel Fishing Gear Digital Fishing reels are an improvement over the standard, well-proven fishing reel and rod used for winding and stowing Continue reading ->

Nov 7, 2020

Reed sensors in Emergency lamp holders

Reed switches in emergency lamp Emergency Lamps Emergency lamps are rechargeable battery powered lamp that automatically turn on when there is a mains power outage. Continue reading ->

Nov 7, 2020

Reed switches and Reed sensors in Pressure Gauges

Reed switches in bourdon tube pressure gauge Pressure Gauge A pressure gauge is an instrument used to display the pressure of a fluid. The most widely used type of pressure gauge Continue reading ->

Nov 7, 2020

Reed sensors in Accurate level sensing of fluids

Reed switches in fluid level sensing Fuel Gauge In ships and yachts, it is not only necessary to monitor the exact volume of fuel, but also the volume of the sewage and the Continue reading ->

Nov 7, 2020

Reed switches in Seatbelt lock sensing

Reed switches in seat belt locking system Seat Belt Lock Seat belts are vehicle safety device used to secure the occupants of a vehicle against harmful movement that may result Continue reading ->

Nov 7, 2020

Magnet sensors in Low fluid level monitoring

Reed switches in low fluid level monitoring Fluid Low Level Automobiles these days need to provide a wide range of information on the various liquid levels ranging from wind Continue reading ->

Nov 7, 2020

Reed sensors in Accurate fuel level sensing

Reed switches in fuel level sensing Fuel Level Automobile fuel gauges are used to display the volume of fuel in the tank. These gauges require a potentiomteric feedback Continue reading ->

Nov 7, 2020

Reed switches as Impact sensors for triggering airbags

Accidental Airbag Prevention Airbags Statistics say almost 80% of automobiles use reed switch based crash sensors for triggering airbags. A ring magnet is mounted Continue reading ->

Nov 7, 2020

Reed switches in Washing machine vibration detection

Reed switches in washing machine Washing Machine Reed Switches are used in bi-directional vibration sensors. These sensors are used in Washing machines to detect Continue reading ->

Nov 6, 2020

Reed sensors in Electric Toothbrushes

Reed switches in electric toothbrush Electric Toothbrush Electric toothbrushes are designed to make the brush head and bristles move in rapid motions, either in a Continue reading ->

Nov 6, 2020

Reed switches in Reed Relays for Fax Machines

Fax machine Fax Machine A Facsimile Machine or Fax Machine enables the transmission of documents over telephone lines. Although these machines Continue reading ->

Nov 6, 2020

MM-1018 10W Micro Miniature Reed Switches
10.0 mm x ø1.80mm, Flattened leads, complete data sheet and technical specifications. This Reed Switch supersedes TRA 2021 and THA 2021 and can be considered a direct equivalent. Customers can safely use MM-1018 in place of MDSR-10, ORD211, KSK-1A87, RI 60, RD-9, HSR-067R or MKA-10110.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: MM-1018
4.2 based on 13 reviews