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

MM-1018 Micro Miniature Reed Switch Drawing
MM-1018 Cropped reed switch MM-1018 SMD reed switch MM-1018 Vertical Mount reed switch MM-1018 Horizontal Mount reed switch

Click thumbnails to view actuation distances


Release AT configurable 10.0 mm glass size Omni-polar 10W Contact rating Does not require power for operation Normally Open, Form A contact  Sputtered Ruthenium contact Inert gas filled glass capsule Four formations Tin plated leads  RoHS Compliant and Lead-free  Not Sensitive to ESD


This 10mm long, Form A type, Micro Miniature reed switch is designed for low power, high speed switching applications, and has a cost advantage over the UM-0018 Ultra-miniature series. The flattened leads are useful for orienting the internal blades to face one way while soldering, welding etc., for maximum in-group sensitivity, and the three different Differential types available, cover a wide range of Release AT specific applications. This micro-miniature reed switch can be molded with a 0.25 mm wall around the glass capsule for use in hazardous industrial environments to withstand higher shock and vibration. This reed switch is completely Lead-free and conforms to the RoHS directive. The cropped version 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. Please click on the thumbnails to view the relevant actuating distances for various Operate AT bands. Information on tolerances for these lead formations can be found here. All drawing dimensions in mm.


Differential Code L M H
Operate Range AT 10 – 40 10 – 40 10 – 40
Release Range AT 4 – 20 6 – 25 7.5 – 30
Contact Rating (max) W/VA 10.0 10.0 10.0
Switching Current (max) A 0.5 0.5 0.5
Carry Current (max) A 0.75 0.75 0.75
DC Switching Voltage (max) VDC 100 100 100
AC Switching Voltage (max) VAC 70 70 70
Breakdown Voltage (min) VDC 200 200 200
Contact Resistance (max) 100 120 150
Insulation Resistance (min) Ω 109 109 109
Capacitance (min) pF 0.2 0.2 0.2


Operate Time (max) ms 0.35
Bounce Time (max) ms 0.3
Release Time (max) ms 0.15
Resonance Frequency Hz >2000
Operating Frequency Hz 500
Operating Temperature °C -40 to +120
Shock Resistance (½Sin wave for 11ms) G 30
Vibration Resistance (10-2000Hz) G 20
Test Coil Code 717 102 003

Ordering Code

MM-1018-(Differential Code)-(Start Operate AT)-(Finish Operate AT)-(Lead Formation code)

Cropped SMD Vertical Mount Horizontal Mount

Ordering Code Examples

MM-1018-L-10-15 denotes 10-15 Operate AT with unmodified leads
MM-1018-H-10-15-S denotes low differential in 10-15 Operate AT band with SMD formed leads
Please check our AT band FAQ for help on release AT codes

Other Special Configurations Available

Lower Static Contact Resistance
Dynamic Contact Resistance Limit
Higher Insulation Resistance
Special Release Limits
Gold plated leads


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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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