Why Choose the Mersen P300232 Protistor® High-Speed Fuse?
The Mersen P300232 is a premium Protistor® Size 33 high-speed semiconductor fuse engineered to deliver ultra-fast protection for sensitive power electronic equipment. Designed specifically for industrial applications, it safeguards diodes, thyristors, IGBTs and other semiconductor devices from damaging short-circuit and overcurrent conditions while helping maximise equipment reliability and minimise downtime.
As part of the advanced Mersen Protistor® Size 33 series, the P300232 combines high interrupting capacity with exceptionally low let-through energy, making it an ideal solution for variable speed drives, UPS systems, power converters, inverters and industrial automation equipment. Silver-plated contacts and robust square body construction ensure dependable long-term performance in demanding electrical environments.
With a rated current of 800 A and a 690 V AC IEC / 700 V AC UL voltage rating, the P300232 features long slotted blade terminals with an integrated striker indicator for straightforward installation and maintenance in industrial power distribution and semiconductor protection systems.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 800 A current rating for high-power industrial equipment.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors, diodes and other semiconductor devices.
- High 200 kA interrupting capacity for improved system protection.
- Integrated striker indicator simplifies maintenance and fuse monitoring.
Key Features
- Mersen Protistor® Size 33 series.
- Catalogue number: A070UD33LI800.
- 800 A rated current.
- 690 V AC IEC / 700 V AC UL operating voltage.
- aR ultra-fast semiconductor protection characteristic.
- Long slotted blade terminals.
- Integrated striker indicator.
- Silver-plated contacts with ceramic square body construction.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before expensive power electronic components can be damaged. The Mersen Protistor® range provides exceptionally low I²t values and rapid fault clearance, helping extend equipment life while reducing maintenance costs and production downtime.
The P300232 is widely specified by OEMs and industrial engineers for protecting variable speed drives, inverters, rectifiers, UPS systems and power conversion equipment operating in demanding industrial environments.
Typical Applications
- Variable speed drives (VSDs).
- Industrial power converters.
- Uninterruptible power supplies (UPS).
- Motor drives and soft starters.
- Rectifiers and inverters.
- Industrial automation and power distribution systems.
