KRDB Series - Delay On Break Timer

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


Operation (Delay-on-Break)
Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output relay energizes. The time delay begins when the initiate switch is opened. The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied.
Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output.

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)		Output
Form		Storage Temperature (F/C)Time Delay RangeDimensionsStockSamplesCompare
KRDB110.1S12 V dcSPDT-40° to 85°C (-40° to 185°F)0.1 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB112.5S12 V dcSPDT-40° to 85°C (-40° to 185°F)2.5 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB1120M12 V dcSPDT-40° to 85°C (-40° to 185°F)20 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB115M12 V dcSPDT-40° to 85°C (-40° to 185°F)5 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB12012 V dcSPDT-40° to 85°C (-40° to 185°F)0.1 - 10 s onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB12412 V dcSPDT-40° to 85°C (-40° to 185°F)1 - 100 m onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB217S24 V ac/dcSPDT-40° to 85°C (-40° to 185°F)7 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB31120S24 V dcSPDT-40° to 85°C (-40° to 185°F)20 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB415S120 V acSPDT-40° to 85°C (-40° to 185°F)5 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB420120 V acSPDT-40° to 85°C (-40° to 185°F)0.1 - 10 s onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB421120 V acSPDT-40° to 85°C (-40° to 185°F)1 - 100 s onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB422120 V acSPDT-40° to 85°C (-40° to 185°F)10 - 1000 s onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB423120 V acSPDT-40° to 85°C (-40° to 185°F)0.1 - 10 m onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDB424120 V acSPDT-40° to 85°C (-40° to 185°F)1 - 100 m onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
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