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 We offer a range of magnets in different sizes and shapes, specially selected to...Continue reading ->

Actuation Distances for MM-1018 Reed Switches

MM-1018 actuation distances On/Off distances for the 10.0 mm MM-1018 reed switch having cropped, SMD, Horizontal Mount...Continue reading ->


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...Continue reading ->

Product Handling

Dropping Reed switch Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro...Continue reading ->

Manual Soldering

Soldered Reed switch Manual Soldering of reed switch leads may be required when using custom plastic housing...Continue reading ->

Ferro-magnetic parts

Ferromagnetic parts Using Ferro-magnetic mounting parts or screws within a 100 mm vicinity of a reed switch will...Continue reading ->

Potting and Encapsulation

Dispensing unit As some potting compounds cure over 24 hours, the glass seals should be protected....Continue reading ->

Reed Contact Protection Circuits

Inductive Load Protection Circuit When a reed switch is to be connected to an inductive load or a...Continue reading ->


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 The motor which drives the glass up or down has a multi-pole ring magnet...Continue reading ->

Reed sensors to control Automobile Sun-roofs

automotive sunroof An automotive sun-roof, usually made of tinted glass, is a movable panel that can...Continue reading ->

Magnet sensors in End position sensing in Cylinders and Pistons

Reed switches in pneumatic linear slide Most pneumatic cylinders, pistons, linear slides and rotary actuators are manufactured with inbuilt magnets...Continue reading ->

Reed switches in Safety Vane applications

conveyor belt Optic sensor lenses need to be exceptionally clean for vane sensing applications. A reed...Continue reading ->

Reed switches in Electronics and Science Kits

Reed switches in science kits Reed Switches are used in many science and electronic kits for experimenting on various...Continue reading ->

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 tracks usually count the number of laps by having a small...Continue reading ->

Reed switches in Model Train Tracks

Reed switches in signal moduling in model train track Reed Switches are placed under train tracks near a junction and each train is...Continue reading ->

Reed switches in LEGO Sensors

Reed switches in LEGO sensor Reed Switches can be built into LEGO bricks to sense position and rotation. Position...Continue reading ->

Reed Switches and Reed Sensors in Digital Fishing Reels

Reed switch usage in electric fishing reel Electric fishing reels are equipped with reed sensors which generate pulse on rotation of...Continue reading ->

Reed sensors in Emergency lamp holders

Reed switches in emergency lamp When emergency lamps are taken off their holders, a buzzer should sound. The lamp...Continue reading ->

Reed switches and Reed sensors in Pressure Gauges

Reed switches in bourdon tube pressure gauge Bourdon tube pressure gauges are fitted with a magnet on the Bourdon tube itself...Continue reading ->

Reed sensors in Accurate level sensing of fluids

Reed switches in fluid level sensing Special reed sensors with an integrated resistor can be mounted on PCBs to give...Continue reading ->

Magnet sensors in Low fluid level monitoring

Reed switches in low fluid level monitoring Wind screen viper fluid, brake oil, power steering oil, and radiator coolant tanks can...Continue reading ->

Reed switches in Seatbelt lock sensing

Reed switches in seat belt locking system In some cars, the seat belts need to be "clicked" in, or the display...Continue reading ->

Reed sensors in Accurate fuel level sensing

Reed switches in fuel level sensing Special reed sensors with an integrated resistor can be mounted on PCBs to give...Continue reading ->

Reed switches as Impact sensors for triggering airbags

Accidental Airbag Prevention Statistics say almost 80% of automobiles use reed switch based crash sensors for triggering...Continue reading ->

Reed switches in Washing machine vibration detection

Reed switches in washing machine Reed Switches are used for building bi-directional vibration sensors. These sensors can detect if...Continue reading ->

Reed sensors in Electric Toothbrushes

Reed switches in electric toothbrush Electric toothbrushes use Reed Sensors to sense change in direction when switching from the...Continue reading ->

Reed switches in Reed Relays for Fax Machines

Fax machine Reed Switch based Reed Relays continue to be used in Fax Machines for switching...Continue reading ->
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
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