C&K Components: Silent Detect Switch with Wide-Angle and Radial Actuation

Thursday, April 10, 2008

C&K Components, a leading international supplier of tact
switches, toggle, rocker and pushbutton switches, and smart card interconnect devices, has
developed a versatile silent detect switch with a variety of orientations. Designated the KSJ
Series, the single pole, single throw, normally open detect switch features high actuation
tolerances along with silent and linear operation during actuation with no tactile effect.
“The features of this detect switch, including straight and vertical orientations, extended
actuation periods, and high actuation tolerances, as well as silver and gold platings for various
environments, provide designers with a high degree of flexibility,” said Eric Grange, Product
Manager for C&K Components. “Coupled with the ‘ghost’ silent actuation mechanism and
designed for end-of-stroke use, the switch is ideal for applications ranging from automotive to
industrial to computer peripherals.”
As an automotive-grade product, typical applications for the KSJ Series switch include
retractable dashboard LCD end of stroke detection, defroster positioning in HVAC rotating
buttons, and passenger airbag switches. The switch is also suitable for computer infrastructures
and industrial electronics, such as rotating and sliding button end of stroke position detection.

The top or side actuated KSJ Series detect switch features long actuation periods of up to 2000
hours under 85°C which ensure higher time at ambient temperature. The spherical actuator
ensures ±30 degree operation (actuation force angle offset) and has extended travel with a
maximum stroke of 1.2mm. The switch is designed with flux sealing and 100K actuation
endurance, and has a feedback of 1N.
Voltage range for the detect switch is 20mV to 32VDC and current ranges from 1mA to 50mA.
Contact resistance is less than 100mO, with a bounce time of less than 1ms. Power ratings are
1VA for the silver plating and 0.2VA for the gold plating. Operating temperature ranges from
-40°C to +85°C (silver plating) and -40°C to +125°C (gold plating).

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