Why Choose the Mersen P300623 Protistor® High-Speed Fuse?
The Mersen P300623 is a premium Protistor® Size 72 high-speed semiconductor fuse designed to provide ultra-fast protection for modern power electronic equipment. Engineered for demanding industrial applications, it protects diodes, thyristors and IGBT devices against damaging short-circuit and overcurrent conditions while helping maximise equipment reliability and minimise downtime.
Part of the advanced Mersen Protistor® Size 72 series, the P300623 features a robust square ceramic body with open slot blade terminals and an integrated striker indicator. Manufactured using die-cut silver fuse elements embedded in solidified sand, it delivers exceptionally low let-through energy and outstanding fault interruption performance for critical semiconductor protection applications.
Rated at 500 A with a 1250 V AC (IEC) / 1300 V AC (UL) voltage rating, the P300623 is ideally suited to industrial drives, UPS systems, renewable energy equipment, power converters and other high-performance electrical installations requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 500 A current rating for high-power industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Protects diodes, thyristors and IGBT devices.
- 126 kA AC breaking capacity.
- Integrated striker indicator for simplified maintenance.
Key Features
- Mersen Protistor® Size 72 series.
- Catalogue number: PC72UD13C500EF.
- 500 A rated current.
- 1250 V AC IEC / 1300 V AC UL operating voltage.
- aR ultra-fast semiconductor protection characteristic.
- Open slot blade terminals.
- Integrated striker indicator.
- Silver-plated contacts with square ceramic body construction.
Reliable Protection for Power Electronics
The Mersen P300623 has been developed for demanding power conversion equipment where semiconductor devices require rapid fault clearance. Its low I²t performance helps minimise thermal stress during fault conditions, reducing the risk of costly equipment damage and extending the service life of protected components.
Suitable for OEM installations and maintenance replacements, the P300623 provides dependable protection in industrial environments where high-speed semiconductor protection is essential for safe and reliable operation.
Typical Applications
- Variable speed drives (VSDs).
- Industrial power converters.
- Renewable energy inverter systems.
- Uninterruptible power supplies (UPS).
- Motor drives and soft starters.
- Industrial automation and power distribution equipment.
