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Littelfuse ESDR Series

17 variants · Littelfuse

About the Littelfuse ESDR Series

The Littelfuse ESDR Series series groups 17 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 adjustment method of Screwdriver Slot. Variants differ by delay time and supply voltage, so you can match the exact delay time your application requires using the selection guide below. All listed Littelfuse ESDR 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 · 1 Min to 100 Min · 1 Sec to 100 Sec · 10 Min to 1000 Min
Supply voltage
12 VDC · 24 VAC · 24 VDC · 120 VAC

Shared specifications

Mounting
Chassis Mount
Package
Bulk
Timing adjustment method
Screwdriver Slot
Timing initiate method
Input Voltage
Type
Solid State Relay

Variant comparison

ParameterESDR123B4PESDR125A5PESDR420A1ESDR423A3ESDR120B3PESDR221A2
Delay time1 Min to 100 Min10 Min to 1000 Min0.1 Sec to 10 Sec0.1 Min to 10 Min0.1 Min to 10 Min1 Sec to 100 Sec
Supply voltage12 VDC12 VDC120 VAC120 VAC12 VDC24 VAC

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

All variants