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Littelfuse

Littelfuse L75QS125 125A 750V DC High-Speed Fuse

Part Number: L75QS125

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L75QS125 is a 125A 750V DC L75QS high-speed fuse for converters, UPS systems and DC common-bus protection.

Rated Current125A
Rated Voltage750V DC
Breaking Capacity50kA @ 750VDC
PackageTraditional Round Body

Littelfuse L75QS125 is a 125A L75QS high-speed fuse rated 750V DC for semiconductor and power-conversion applications. The current-limiting round-body design carries a 50kA DC interrupting rating, with 2208 A²s pre-arcing I²t and 7069 A²s total clearing I²t. Review the official technical sheet when finalizing circuit protection selection. For cross-reference work, compare its interrupting rating before the terminal style, and verify the approval status against the Littelfuse technical sheet.

Technical Specifications

Part Number
L75QS125
Manufacturer Part Number
L75QS125
Series
L75QS Series
Fuse Type
High-Speed Round-Body DC Semiconductor Fuse
Current Rating
125A
Voltage Rating
750V DC
AC / DC
DC
Breaking Capacity
50kA @ 750VDC
I²t
7069 A²s total @ 750VDC
Pre-arcing I²t
2208 A²s
Total I²t
7069
Operating Temperature
-55°C to +125°C
Package / Dimensions
Traditional Round Body
Mounting
Bolt-Down
Application
DC distribution · EV · Power Electronics · UPS
Standard
UL Recognition
Terminal Type
Bolted Tags
Fuse Speed
Very Fast Acting
Approvals
RoHS · UL Recognized
Certifications
UL Recognized · cURus · RoHS · REACH
Body
Melamine
Caps
Copper alloy
Total clearing I²t
7069 A²s @ 750VDC

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