KM Series
Subminiature Detect Switch

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The KM series subminiature detect switch is engineered with a reliable contact design and made available to designers with both pretravel and overtravel capabilities. Typically used in alarm systems, computers and as a detector switch application, C&K’s KM series are known for being high quality and compact.

Features and Benefits

  • Reliable contact design
  • Available with pretravel and overtravel

Typical Applications

  • Alarm systems
  • Computers
  • Detector switch application


  • Contact Rating:

    Silver contact material: 0.25 A @ 125 V AC or DC (UL). See datasheet for additional ratings

  • Electrical Life:

    10,000 actuations min. at full load

  • Contact Resistance:

    Below 30 milliohms typ. initial @ 2-4 V DC, 100 mA, for both silver and gold plated contacts

  • Insulation Resistance:

    109 ohms min.

  • Dielectric Strength:

    1,000 Vrms min. @ sea level

  • Operating Temperature:

    –30ºC to 85ºC

= Most Common

Current Rating Circuit Mounting Type Sealing Illumination Switch Function Electrical Life Cycles Voltage Rating - AC Voltage Rating - DC Actuator Type Termination Style Operating Force, Torque Release Force Pretravel Overtravel Packaging
0.4VA (AC/DC) SPDT Thru-hole Unsealed None 10,000 20V 20V
0.25A SPDT Thru-hole Unsealed None 10,000 125V 125V