KSDS Series - Single Shot Timer

Littelfuse Single Shot Relays
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The KSDS Series is ideal for applications that require momentary start interval timing including dispensing, exposure timing, or pulse shaping. This series is available for both AC and DC voltages. This series is designed for general purpose commercial and industrial applications where a small, cost effective, reliable solid-state timer is required. The factory calibration for fixed time delays is within 5% of the target time delay. The repeat accuracy, under stable conditions, is 0.5% of the selected time delay. Time delays of 0.1 seconds to 1000 minutes are available in 6 ranges. The output is rated 1A steady and 10A inrush. The modules are totally solid state and encapsulated to protect the electronic circuitry.

Operation (Single Shot)
Input voltage must be applied before and during timing. Upon momentary or maintained closure of the initiate switch (leading edge triggered), the output energizes for a measured interval of time. At the end of the delay, the output de-energizes. Opening or reclosing the initiate switch during timing has no affect on the time delay. The output will not energize if the initiate switch is closed when input voltage is applied.
Reset: Reset occurs when the time delay is complete and the initiate switch is opened. Loss of input voltage resets the time delay and output.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Time Delay RangeSample CapableCompare
KSDS1115SP12VDCNO closed during timing5s fixedNo
KSDS23024VACNO closed during timing0.1 - 10s onboard adjustableNo
KSDS320P24VDCNO closed during timing0.1 - 10s externally adjustableNo
KSDS415M120VACNO closed during timing5m fixedNo
KSDS420120VACNO closed during timing0.1 - 10s externally adjustableNo