KRDM Series - Delay On Make Timer

Series: KRDM
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The KRDM 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 KRDM Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life.


Operation (Delay-on-Make)
Upon application of input voltage, the time delay begins. The output is de-energized before and during the time delay. At the end of the time delay, the output relay energizes and remains energized until input voltage is removed.
Reset: Removing 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
KRDM1110S12 V dcSPDT-40° to 85°C (-40° to 185°F)10 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM1130S12 V dcSPDT-40° to 85°C (-40° to 185°F)30 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM12012 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
KRDM12112 V dcSPDT-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
KRDM2110M24 V ac/dcSPDT-40° to 85°C (-40° to 185°F)10 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM215M24 V ac/dcSPDT-40° to 85°C (-40° to 185°F)15 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM22024 V ac/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
KRDM22124 V ac/dcSPDT-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
KRDM22324 V ac/dcSPDT-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
KRDM310.2S24 V dcSPDT-40° to 85°C (-40° to 185°F)0.2 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM4110M120 V acSPDT-40° to 85°C (-40° to 185°F)10 m fixed2 H x 2 W in. (50.8 x 50.8 mm)
KRDM4110S120 V acSPDT-40° to 85°C (-40° to 185°F)10 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM4145S120 V acSPDT-40° to 85°C (-40° to 185°F)45 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM420120 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)Order
KRDM421120 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
KRDM424120 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
KRDM430120 V acSPDT-40° to 85°C (-40° to 185°F)0.1 - 10 s externally adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM433120 V acSPDT-40° to 85°C (-40° to 185°F)0.1 - 10 m externally adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRDM6115M230 V acSPDT-40° to 85°C (-40° to 185°F)15 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
KRDM424 2x2 D.O.M. W/RELAY RoHS No 02/09/2020 PbFree No 02/09/2020 CoC_RoHS9_KRDM424 Yes
02/09/2020
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