
Series: PSR Flush End
PSR Flush End Series – High-Speed Semiconductor Fuse, Square Body
The PSR Flush End series is a POWR-SPEED® high-speed, square body fuse specifically designed for the protection of power semiconductor devices such as diodes, triacs, IGBTs, SCRs, MOSFETs, and other solid-state devices that are typically used in power conversion and power conditioning equipment. Variable frequency drives, inverters, UPS, rectifiers, and soft-starters are examples of 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. These products are commonly found in pulp and paper industries, cranes and heavy-lifting equipment, processing industries, wastewater treatment plants, and various large factories and MRO facilities.
- Extremely current-limiting
- Global certification cURus, CCC*, IEC
- Low watt-loss design
- POWR-SPEED® technology
- Best-in-class dc performance
- Superior cycling capability
- Visual and optional microswitch fuse blown indication
- Compliance with US and Canadian requirements
- Fast-acting Class aR performance
- Direct bus-bar mount design
- 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
PSR Flush End Parts
Filters
Part Number | Actions | Current Rating (Continuous) in Amps | Interrupting Rating | Opening | Case Size | Amp Code (Part Number) | Agency Approvals |
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Part Number | Actions | Current Rating (Continuous) in Amps | Interrupting Rating
| Opening | Case Size | Amp Code (Part Number) | Agency Approvals | |
---|---|---|---|---|---|---|---|---|
40 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 40 | UR / CUR / CCC / CE | |||
50 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 50 | CCC / CE / UR / CUR | |||
63 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 63 | CCC / CE / CUR / UR | |||
80 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 80 | CCC / UR / CE / CUR | |||
100 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 100 | CCC / UR / CE / CUR | |||
125 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 125 | CCC / UR / CE / CUR | |||
160 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 160 | UR / CCC / CE / CUR | |||
200 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 200 | UR / CCC / CE / CUR | |||
250 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 250 | UR / CCC / CE / CUR | |||
315 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 315 | UR / CCC / CE / CUR | |||
350 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 350 | CCC / UR / CE / CUR | |||
400 | 200 kA @ 700 Vac | Very Fast-Acting (FF) | 30 | 400 | CCC / UR / CUR / CE |
PSR Flush End Applications
- Power conversion devices (UPS, inverter, rectifiers, drives)
- Dc systems (dc common bus, dc injection braking)
- Battery protection application (energy storage systems)
- EV charging stations
- Heaters and power supplies
Series: PSR Flush End Resources

POWR-SPEED Fuse Cross Reference Guide - Mandarin

POWR-SPEED Fuse Cross Reference Guide
Consult this chart when you need to find a high-speed fuse made by Littelfuse to replace one made by a different company.

POWR-SPEED® and PSR Series High-Speed Fuses
See why these devices make good choices for protecting motor drive and power management circuits from damaging overcurrent surges.