5 variants · Littelfuse
The Littelfuse Littelfuse ECS4 Series series groups 5 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, operating temperature of 60 °C and output signal of Relay. Variants differ by delay time and trip range, so you can match the exact delay time your application requires using the selection guide below. All listed Littelfuse ECS4 Series part numbers are active and orderable.
| Parameter | ECS40A | ECS40AC | ECS41BH | ECS4HBH | ECS41A |
|---|---|---|---|---|---|
| Delay time | 0.15 Sec to 7 Sec | 0.15 Sec to 7 Sec | 0.5 Sec to 50 Sec | 0.5 Sec to 50 Sec | 0.15 Sec to 7 Sec |
| Trip range | 0.5–5 A AC | 0.5–5 A AC | 2–20 A AC | 5–50 A AC | 2–20 A AC |
Request a quote on any Littelfuse ECS4 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.
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