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Littelfuse KRDB Time Delay Relays Series

14 variants · Littelfuse

About the Littelfuse KRDB Time Delay Relays Series

The Littelfuse KRDB Time Delay Relays Series series groups 14 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 timing initiate method of Input Voltage, Trigger Signal. 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 KRDB Time Delay Relays Series part numbers are active and orderable.

Select a variant by

Delay time
0.1 Min to 10 Min · 0.1 Sec to 10 Sec · Fixed, 0.1 Sec · Fixed, 2.5 Sec · Fixed, 5 Min · Fixed, 5 Sec · Fixed, 7 Sec · Fixed, 20 Min · Fixed, 20 Sec · Fixed, 60 Sec · Fixed, 180 Sec
Supply voltage
12 VDC · 24 VAC/DC · 24 VDC · 120 VAC
Timing adjustment method
Fixed · Screwdriver Slot

Shared specifications

Mounting
Chassis Mount
Package
Bulk
Timing initiate method
Input Voltage, Trigger Signal
Type
Mechanical Relay

Variant comparison

ParameterKRDB115MKRDB420KRDB423KRDB110.1SKRDB21180SKRDB217S
Delay timeFixed, 5 Min0.1 Sec to 10 Sec0.1 Min to 10 MinFixed, 0.1 SecFixed, 180 SecFixed, 7 Sec
Supply voltage12 VDC120 VAC120 VAC12 VDC24 VAC/DC24 VAC/DC
Timing adjustment methodFixedScrewdriver SlotScrewdriver SlotFixedFixedFixed

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

All variants