Littelfuse KRD9 Series

6 variants · LittelfuseAll Time Delay Relays →

About the Littelfuse KRD9 Series

The Littelfuse KRD9 Series series groups 6 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 KRD9 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, 15 Min
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

Parameter	KRD9120B	KRD92115MA	KRD92115MB	KRD93115MA	KRD9220B	KRD9423B
Delay time	0.1 Sec to 10 Sec	Fixed, 15 Min	Fixed, 15 Min	Fixed, 15 Min	0.1 Sec to 10 Sec	0.1 Min to 10 Min
Supply voltage	12 VDC	24 VAC/DC	24 VAC/DC	24 VDC	24 VAC/DC	120 VAC
Timing adjustment method	Screwdriver Slot	Fixed	Fixed	Fixed	Screwdriver Slot	Screwdriver Slot

Request a quote on any Littelfuse KRD9 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.