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Usage Notes

Reed Glossary

UM-0018 Ultra Miniature Reed Switch

Glass length configurable 7.0 mm or 5.0 mm

Glass sealed on round portion of wire for high seal strength

Flattened leads oriented to contact

RoHS Compliant and Lead-free

7-20 Operate AT band

These highly sensitive, form A reed switches are designed for low power, high speed switching applications, where there is a size restriction. The 5 mm glass version is built for use in very compact applications, and the 7 mm glass version is built for lower contact resistance and can switch higher loads. The flattened lead outs are useful for orienting all reed switches in a batch, in one way, while soldering, welding etc., for maximum in-group sensitivity. The 5.0mm glass version 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.

UM-0018 Ultra Miniature Reed Switch Drawing

All dimensions in mm

Not to be cropped or formed, less than 2.0 mm from the seals

Download this data sheet

Lead Formations

UM-0018-M 5.0 mm reed switches and UM-0018-H 7.0 mm reed switches can be supplied in the standard formations shown below. Do contact us for any other special formations or non-standard bending /forming pitches. More information on these formations and tolerances for the dimensions given below can be found here.

Applications

This reed switch is suitable for use in the following applications and in many others: dentists drills, reed relays, pacemakers and defibrillators, nerve stimulators, spirometers, shock sensors, automobile crash sensors, vane sensors, LEGO sensors, musical greeting cards...

Electrical

Sub Code		M	H
Glass Length	mm	5.0	7.0
Operate Range	AT	7 - 20	7 - 20
Release Range	AT	3 - 18	3 - 18
Contact Rating (max)	W / VA	5.0	10.0
Switching Current (max)	A	0.35	0.5
Carry Current (max)	A	0.5	0.5
DC Switching Voltage (max)	V DC	100	100
AC Switching Voltage (max)	V AC	70	70
Breakdown Voltage (min)	V DC	150	150
Initial Contact Resistance (max)	mΩ	200	200
Insulation Resistance (min)	Ω	10⁹	10⁹
Capacitance (min)	Pf	0.2	0.2

Miscellaneous

Operate Time (max)	ms	0.35
Bounce Time (max)	ms	0.3
Release Time (max)	ms	0.1
Resonance Frequency	Hz	> 2000
Operating Frequency (max)	Hz	500
Operating Temperature	°C	-40 to +120
Shock Resistance (½Sin wave for 11ms)	g	30
Vibration Resistance (10-2000Hz)	g	20
Measurement Test Coil		717 102 003