How do the Littelfuse Littelfuse KRPS Series variants differ?

Littelfuse KRPS Series part numbers differ by delay time, supply voltage, timing adjustment method and timing initiate method. Use the selection guide above to pick by delay time.

How many Littelfuse Littelfuse KRPS Series part numbers are listed?

10 Littelfuse Littelfuse KRPS Series part numbers are listed, each with specifications and a datasheet where available.

How do I get pricing and lead time for Littelfuse Littelfuse KRPS Series?

Request a quote (RFQ) for any Littelfuse KRPS Series part number and we confirm price, availability and lead time per line — including end-of-life and hard-to-find variants.

Littelfuse KRPS Series

10 variants · Littelfuse

About the Littelfuse Littelfuse KRPS Series series

The Littelfuse Littelfuse KRPS Series series groups 10 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Every variant in the range shares a common mounting of Chassis Mount, package of Bulk and type of Mechanical Relay. Variants differ by delay time, supply voltage and timing adjustment method, so you can match the exact delay time your application requires using the selection guide below. All listed Littelfuse KRPS Series part numbers are active and orderable.

Parameter	KRPS4160MM	KRPSD22M	KRPS913MB	KRPSD21B	KRPSD21M	KRPSD22S
Delay time	Fixed, 60 Min	1 Sec to 100 Sec	Fixed, 3 Min	0.1 Sec to 10 Sec	0.1 Sec to 10 Sec	1 Sec to 100 Sec
Supply voltage	120 VAC	12 to 48VDC	230 VAC	12 to 48VDC	12 to 48VDC	12 to 48VDC
Timing adjustment method	Fixed	Screwdriver Slot	Fixed	Screwdriver Slot	Screwdriver Slot	Screwdriver Slot
Timing initiate method	Input Voltage, Trigger Signal	Input Voltage, Trigger Signal	Input Voltage, Trigger Signal	Input Voltage, Trigger Signal	Input Voltage, Trigger Signal	Input Voltage, Trigger Signal

Littelfuse KRPS Series

About the Littelfuse Littelfuse KRPS Series series

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Variant comparison

Shared specifications

Frequently asked questions

All variants

KRPS4160MM

KRPSD22M

KRPS913MB

KRPSD21B

KRPSD21M

KRPSD22S

KRPSD25S

KRPSA21RE

KRPSA22B

KRPSA10.1SFT

KRPS4160MM

KRPSD22M

KRPS913MB

KRPSD21B

KRPSD21M

KRPSD22S

KRPSD25S

KRPSA21RE

KRPSA22B

KRPSA10.1SFT