KRDI Series - Interval Timer

Littlefuse Interval Relays
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The KRDI Series is a compact time-delay relay measuring only 2 in. (50.8 mm) square. Its solid-state timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. The KRDI Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life.

Operation (Interval)
Upon application of input voltage, the time delay begins. The output relay energizes during the time delay. At the end of the time delay, the output de-energizes and remains de-energized until input voltage is removed.
Reset: Removing input voltage resets the time delay and the output.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Storage Temperature (F/C)Time Delay RangeSample capableCompare
KRDI12012VDCSPDT-40° to 85°C (-40°F to 185°F)0.1 - 10s onboard adjustableNo
KRDI12112VDCSPDT-40° to 85°C (-40°F to 185°F)1 - 100s onboard adjustableNo
KRDI12212VDCSPDT-40° to 85°C (-40°F to 185°F)10 - 1 000s onboard adjustableNo
KRDI2110S24VAC/DCSPDT-40° to 85°C (-40°F to 185°F)10s fixedNo
KRDI2160S24VAC/DCSPDT-40° to 85°C (-40°F to 185°F)60s fixedNo
KRDI22024VAC/DCSPDT-40° to 85°C (-40°F to 185°F)0.1 - 10s onboard adjustableNo
KRDI32024VDCSPDT-40° to 85°C (-40°F to 185°F)0.1 - 10s onboard adjustableNo
KRDI420120VACSPDT-40° to 85°C (-40°F to 185°F)0.1 - 10s onboard adjustableNo
KRDI424120VACSPDT-40° to 85°C (-40°F to 185°F)1 - 100m onboard adjustableNo