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

UM-0018-H Ultra Miniature Reed Switch

UM-0018-H Ultra Miniature Reed Switch Drawing
UM-0018-H Cropped reed switch UM-0018-H SMD reed switch UM-0018-H Vertical Mount reed switch UM-0018-H Horizontal Mount reed switch

Click thumbnails to view actuating distances.


Glass sealed on round portion of wire for high seal strength  Flattened leads oriented to contact ♦ Sputtered Ruthenium contact ♦ RoHS Compliant and Lead-free ♦ Not Sensitive to ESD ♦ 7-20 Operate AT band 


These highly sensitive, Form A reed switches are designed for low power, high speed switching applications. The 7 mm glass version is built for lower Contact Resistance and can switch higher loads. The flattened leads are useful for orienting all reed switches in a batch, in one way, while soldering, welding etc., for maximum in-group sensitivity. This reed switch is completely Lead-free and conforms to the RoHS directive.


This reed switch is suitable for use in the following applications and in many others: dentists drillsreed relayspacemakers and defibrillatorsnerve stimulatorsspirometers, lightsaberspower showersautomobile crash sensorsvane sensorsLEGO sensorsmusical greeting cards, key in ignition detection, feeding tubes


Glass Length mm 7.0
Operate Range AT 7-20
Release Range AT 3-18
Contact Rating (max) W/VA 10.0
Switching Current (max) A 0.5
Carry Current (max) A 0.5
DC Switching Voltage (max) VDC 100
AC Switching Voltage (max) VAC 70
Breakdown Voltage (min) VDC 150
Contact Resistance (max) 200
Insulation Resistance (min) Ω 109
Capacitance (min) pF 0.2


Operate Time (max) ms 0.35
Bounce Time (max) ms 0.3
Release Time (max) ms 0.1
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

UM-0018-H-(Start Operate AT)-(Finish Operate AT)-(Lead Formation code)

Cropped SMD Vertical Mount Horizontal Mount

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.
UM-0018-H-7-12 denotes 7-12 Operate AT with unmodified leads
UM-0018-H-15-18-S denotes 15-18 Operate AT band with SMD formed leads

Other Special Configurations Available

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

UM-0018-H 10W Ultra Miniature Reed Switches
7.0mm x ø1.80mm, complete data sheet and technical specifications. This Reed Switch supersedes TRA 2212 and TRA 2213 and can be considered a direct equivalent. Customers can safely use UM-0018-H in place of MITI-3V1, ORD 213, KSK-1A80, RI 70, RD-18B, HSR-023R or MKA-07101.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: UM-0018-H
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