Support

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. Additionally, PSR series fuses are widely used in high-dc applications such as dc common bus systems, battery energy storage systems, and dc power supplies.

They 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. Such products are also commonly found in Battery energy storage systems, IT infrastructure (data centers that use UPS), critical power application that utilizes UPS, and EHouses used in drilling rigs in oil & gas industry.

Features Benefits Extremely current-limiting PSR series high-speed square body fuses reduce peak let-through current and let-through energy to protect semiconductor components and devices. Indication with micro-switch Visual blown fuse indication on the fuse and optional micro-switch feature offer remote indication/alarm communication. Optimized performance PSR series high-speed square body fuses have a very balanced speed of operation and energy efficiency. Flush end terminals Flush end terminals allow for the fuse to be mounted directly to the bus-bar. RoHS and REACH-compliant PSR series high-speed square body fuses are environmentally friendly.

With the rise of dc applications (including energy storage, EV charging station, and UPS), there is a growing need for enhanced dc protection to safeguard these systems. The PSR series offers the “Best-In-Class” dc protection performance available in the market: increased dc voltage compared to the competition (typically 50V to 100V higher than the competition) and increased dc interrupting rating (typically 20kA to 50 kA higher than the competition).

Littelfuse shares extensive technical information on each product’s datasheet to assist the design process.

Please continue to work with your U.S. Sensor contact for updates on orders and deliveries.

Please check inventory at your preferred distributor online or contact your local sales representative.

Please submit your inquiry for competitor cross information to sales.ussensor@littelfuse.com.

Product and technical information is available at the Littelfuse Temperature Sensors.

Cartridge fuses are cylindrical in shape and have contact points at each end. 

A cartridge fuse is a safety device used to protect electrical equipment and provide circuit protection. Cartridge fuses are available in a wide variety of sizes, amp, and volt ratings up to 600 VAC and 600 Amps.

Cartridge fuses contain a piece of wire that melts when too much current flows through the circuit. When the wire melts, it breaks the circuit which prevents any damage.