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Littelfuse 777H Series

4 variants · Littelfuse

About the Littelfuse 777H Series

The Littelfuse 777H Series series groups 4 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 temp operating max of 70 °C. 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. All listed Littelfuse 777H Series part numbers are active and orderable.

Select a variant by

Delay time
0 to 999 s · 0.2 to 500 s
Supply voltage
200 to 480VAC · 340 to 480VAC · 380 to 480VAC
Trip range
1–800 A · 2–90 A · 2–800 A

Shared specifications

Mounting
Chassis Mount
Package
Bulk
Temp operating max
70 °C
Temp operating min
-20 °C

Variant comparison

Parameter777-HRG-P2777-HVR-KW/HP-P2777-HVR-LR-P2777-HVR-SP
Delay time0 to 999 s0 to 999 s0 to 999 s0.2 to 500 s
Supply voltage200 to 480VAC340 to 480VAC380 to 480VAC340 to 480VAC
Trip range2–90 A2–800 A1–800 A2–800 A

Request a quote on any Littelfuse 777H Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.

All variants