Littelfuse KRPS Time Delay Relays Series

10 variants · LittelfuseAll Time Delay Relays →

About the Littelfuse KRPS Time Delay Relays Series

The Littelfuse KRPS Time Delay Relays 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 Time Delay Relays Series part numbers are active and orderable.

Select a variant by

Delay time: 0.1 Sec to 10 Sec · 1 Min to 100 Min · 1 Sec to 100 Sec · Fixed, 0.1 Sec · Fixed, 3 Min · Fixed, 60 Min
Supply voltage: 12 to 48VDC · 24 to 240VAC/DC · 120 VAC · 230 VAC
Timing adjustment method: Fixed · Screwdriver Slot
Timing initiate method: Input Voltage · Input Voltage, Trigger Signal

Shared specifications

Mounting: Chassis Mount
Package: Bulk
Type: Mechanical Relay

Variant comparison

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

Request a quote on any Littelfuse KRPS Time Delay Relays Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.