How do the Littelfuse Littelfuse ECSL Series variants differ?

Littelfuse ECSL Series part numbers differ by delay time, supply voltage and trip range. Use the selection guide above to pick by delay time.

How many Littelfuse Littelfuse ECSL Series part numbers are listed?

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

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

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

Littelfuse ECSL Series

9 variants · Littelfuse

About the Littelfuse Littelfuse ECSL Series series

The Littelfuse Littelfuse ECSL Series series groups 9 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. The listed variants share a common mounting of Chassis Mount, operating temperature of 60 °C and output signal of Relay. Variants differ by delay time, supply voltage and trip range, so you can match the exact delay time your application requires using the selection guide below.

Parameter	ECSL31A	ECSL40AC	ECSL40BH	ECSL41AH	ECSL4HAC	ECSL4HBH
Delay time	0.15 Sec to 7 Sec	0.15 Sec to 7 Sec	0.5 Sec to 50 Sec	0.15 Sec to 7 Sec	0.15 Sec to 7 Sec	0.5 Sec to 50 Sec
Supply voltage	24 VDC	120 VAC	120 VAC	120 VAC	120 VAC	120 VAC
Trip range	2–20 A AC	0.5–5 A AC	0.5–5 A AC	2–20 A AC	5–50 A AC	5–50 A AC

Littelfuse ECSL Series

About the Littelfuse Littelfuse ECSL Series series

Select a variant by

Variant comparison

Shared specifications

Frequently asked questions

All variants

ECSL31A

ECSL40AC

ECSL40BH

ECSL41AH

ECSL4HAC

ECSL4HBH

ECSL6HAC

ECSL41AD

ECSL31A

ECSL40AC

ECSL40BH

ECSL41AH

ECSL4HAC

ECSL4HBH

ECSL6HAC

ECSL41AD