Why Choose the Mersen L300758 Protistor® High-Speed Fuse?
The Mersen L300758, catalogue number PC33UD45V2500TF, is a Protistor® Size 33 square body high-speed semiconductor fuse designed to provide outstanding protection for high-power semiconductor equipment. Featuring an ultra-fast aR operating characteristic, it delivers rapid interruption of short-circuit currents to protect IGBTs, thyristors, diodes and other sensitive power semiconductor devices.
Built for demanding industrial power conversion systems, the L300758 combines exceptionally high current capability with low let-through energy and a high breaking capacity. It features flush bolted terminals (TF), reinforced silver-plated contacts and precision fuse elements embedded in solidified silica for dependable long-term performance.
With a 2500 A current rating, 450 V AC IEC and 500 V AC UL voltage ratings, the Mersen L300758 is ideally suited to large variable speed drives, industrial converters, soft starters, UPS systems and other heavy-duty semiconductor power applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 2500 A current rating for very high-power applications.
- 450 V AC IEC / 500 V AC UL voltage capability.
- Low I²t characteristics minimise semiconductor damage.
- 200 kA AC breaking capacity.
- Flush reinforced bolted terminals for secure installation.
- Silver-plated contacts ensure excellent conductivity.
- Designed specifically for high-performance power electronics.
Key Features
- Mersen Protistor® Size 33 series.
- Catalogue number: PC33UD45V2500TF.
- 2500 A rated current.
- 450 V AC IEC / 500 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Flush bolted terminals (TF).
- Silver-plated contact surfaces.
- Square body ceramic construction.
- Reinforced terminal design.
Designed for Heavy-Duty Semiconductor Protection
Protistor® semiconductor fuses are engineered to interrupt extremely high fault currents before expensive semiconductor devices suffer catastrophic damage. Their ultra-fast operation and low energy let-through characteristics maximise equipment reliability while reducing maintenance costs in demanding industrial power conversion systems.
The robust ceramic square body, reinforced terminals, precision fuse elements and high interrupting capacity make the Mersen L300758 an ideal choice for protecting high-current converters, industrial drives and heavy-duty power electronic installations.
Typical Applications
- Large variable speed drives.
- Industrial power converters.
- High-power rectifiers.
- UPS systems.
- DC drive systems.
- Heavy industrial motor control.
- IGBT, thyristor and diode protection.
