Retrig Single Shot Timers Series - Retrig Single Shot Timers

Series: Retrig Single Shot Timers
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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 KRD9 Series microcontroller timing circuit provides excellent repeat accuracy and stability. Cost effective approach for OEM applications that require small size, isolation, reliability, and long life.


Operation (Retriggerable Single Shot)
Function Type A (Output Initially De-energized): Input voltage must be applied prior to and during timing. When the initiate switch is closed, (momentary or maintained) the output energizes and the time delay starts. On completion of the delay, the output de-energizes. The unit will time out if S1 remains in the open or closed position for the full time delay. Re-closing the initiate switch resets the time delay and restarts timing; the output remains energized. The output will not energize if the initiate switch is closed when input voltage is applied.

Function Type B (Output Initially Energized): Upon application of input voltage, the output energizes and the time delay starts. At the end of the time delay, the load de-energizes. The unit will time out if S1 remains in the open or closed position for the full time delay. Closing (re-closing) the initiate switch resets the time delay and restarts timing; the output remains energized.
Reset: The time delay and the output are reset when input voltage is removed.

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		Max. Output
Voltage (V)		Storage Temperature (F/C)Time Delay RangeDimensionsStockSamplesCompare
KRD9120B12 V dcSPDT250-40° 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
KRD92115MA24 V ac/dcSPDT250-40° to 85°C (-40° to 185°F)15 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRD92115MB24 V ac/dcSPDT250-40° to 85°C (-40° to 185°F)15 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRD9220B24 V ac/dcSPDT250-40° 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
KRD93115MA24 V dcSPDT250-40° to 85°C (-40° to 185°F)15 m fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
KRD9423B120 V acSPDT250-40° 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
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
KRD92115MA TIMER-RETRIG SSHOT 24VAC/DC RoHS No 08/18/2021 PbFree No 08/18/2021 Yes
08/18/2021
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