Description
Littelfuse PSR series high-speed square body fuses are
specially designed for protection of power semiconductor
devices such as diodes, triacs, IGBTs, SCRs, MOSFETs,
and other solid state devices that are typically designed
into power conversion and power conditioning equipment.
Variable frequency drives, inverters, UPS, rectifiers, and
soft-starters are examples of typical equipment designed
with sensitive power semiconductor devices that cannot
withstand any line surge or overcurrent conditions and
require high-speed protection.
Littelfuse POWR-SPEED PSR series products offer
optimized circuit protection at the extremely fast speed
required to protect modern day power conversion devices.
Such products are commonly found in numerous applications
including pulp and paper industries, cranes and heavy-lifting
equipment, processing industries, wastewater treatment
plants, and various large factories and MRO facilities.

Features/Benefits
 Best in class dc performance
 Extremely current limiting  Superior cycling capability
 Global certification cURus, CCC*  Direct bus-bar mount design
 Visual and optional microswitch fuse blown indication
 Low watt-loss design
 Compliance with US and Canadian requirements
 Fast-acting Class aR performance

Applications
 Power conversion devices (UPS, inverter, rectifiers, drives)
 Dc systems (dc common bus, dc injection braking)
 Battery protection application (energy storage systems)
 Electric vehicle charging stations
 Heaters and power supplies

Specifications
Voltage Range Ac: 450 V–1300 V
Dc: 450 V–1000 V
Amperage Range 40 A–2250 A
Interrupting Range Ac: 100 kA–200 kA
Dc: 150 kA
Time Constant 10 ms at IR
Microswitch Yes
Mounting Flush-end style
Material Body: ceramic
Contacts: plated brass
Approvals UL 248-13 Recognized (File: E71611)
cURus (File: E71611)
CCC*
Applicable Standards UL248-13, IEC 60269-4 (Class aR)
Environmental RoHS Compliant, REACH
Operating Temperature -55 °C to +125 °C
Storage Temperature Up to +35 °C with relative humidity
<65 %
Country of Origin Mexico