KSK-1A55 Reed Switches
High Power Reed Switches - KSK-1A55 Reed Switches
High Power Switch, SPST Magnetic Reed Switch, Rated power 50VA, Switching voltage 200VDC, Switching current 0.5A [more]

New Catalog - 2014

Tutorials - Audio Version

3-D Magnetic Mapping
Magnet Interactions
Magnet Technology & Uses
Latching Sensors & Relays
Liquid Level Sensing
Reed, Hall & EM Overview
Reed Switch Technology
Reed Relay as RF Switch Part 1
Reed Relay as RF Switch Part 2


Form A = normally open contact (N. O.)
Form B = normally closed contact (N.C.)
Form C = change over contact (S.P.D.T.)
Form E = Bistable / Latching
AT = Ampere Turns; Parameter that describes magnetic sensitivity.

Reed Switch Resources

Basic Reed Switch
General function and description of Reed Switches.

Electrical Parameters
Basis electrical characteristics of Reed Switches.

Handling Precautions
Proper switch handling techniques and load precautions.

Life Test Data
View life test data for Reed Switches.

Magnetic Field Strength
Ampere Turns (AT) vs. milliTesla (mT).

Magnetic Operation
See how reed switches operate using different magnet positions and motion.

Reed Switch Applications
Reed Switch used in Reed Relays.

Switching Load Precautions
Load switching and contact protection.

Technology Comparison
View a comparision between Reed Switches and micro switches.

Please note: All dimensions represent the maximum glass length followed by the nominal overall lead length unless otherwise specified.