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.
The PSR series with bolted blades is designed and tested
to IEC 60269-4.
Littelfuse POWR-SPEED® PSR series products offer
optimized circuit protection at the extremely fast speed
required to protect modern day power conversion devices.
Available in bolted blade style termination (typical in North
American market) with visual blown fuse indication standard
on all fuses and optional micro-switch for external indication.

Features/Benefits
 Best in class dc performance  Extremely current limiting
 Superior cycling capability
 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 Rating Ac: 450 V–1300 V
Dc: 450 V–1000 V
Amperage Rating 40 A–2250 A
Interrupting Rating Ac: 100 kA–200 kA
Dc: 150 kA
Time Constant 10 ms at IR
Microswitch Yes
Mounting Bolted blade style
Material Body: ceramic
Contacts: plated copper
Approvals UL 248-13 Recognized (File: E71611)
cURus (File: E71611)
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