Description
The L75QS series is a next generation high-speed fuse
for the protection of power semiconductor devices and is
designed in the traditional round body bolted style package.
L75QS series high-speed fuses rated at 750 V dc are
extremely current limiting and are used to protect power
converters, drives and control circuit applications. Designed
with lower I2t performance characteristics, these fuses
provide balanced performance to extend longevity while
lowering potentially damaging heat energy to the devices
being protected.
In addition L75QS series fuses have been designed with a
universal mounting option to meet customer requirements
for installation into a variety of application configurations.
Littelfuse POWR-SPEED products offer optimized circuit
protection at the extremely fast speed required to protect
modern day, sensitive, high-power semiconductor devices.

Features
Compliance with US and Canadian requirements
Traditional North American bolted style dimensions
750 V dc performance
Direct bus-bar mount or stud mount design
Halogen free, RoHS and REACH compliant

Applications
Power converters (inverters, rectifiers)
Power supplies, UPS
EV charging stations
Variable speed drives
Dc common bus

Specifications
Voltage Rating Dc: 750 V
Amperage Rating 35–800 A
Interrupting Rating Dc: 50 kA
Time Constant 10 ms
Material Body: Melamine
Caps: Copper Alloy
Approvals UL Recognized (E71611)
cURus (E71611)
Environmental RoHS compliant, REACH
Country of Origin Mexico
Operating Temperature -55 °C to +125 °C
Storage Temperature Up to 35 °C with relative humidity <65 %