Why Choose the Mersen W300675 Protistor® High-Speed Fuse?
The Mersen W300675 (A130UD72LI500) is a Protistor® Size 72 high-speed square body semiconductor fuse engineered to provide outstanding protection for modern power electronic equipment against destructive short-circuit currents. Designed for demanding industrial applications, it delivers ultra-fast fault interruption and exceptional current limitation to safeguard valuable semiconductor devices.
Designed specifically for protecting diodes, thyristors and IGBT devices, the W300675 incorporates precision die-cut fuse elements embedded in solidified sand to achieve very low let-through energy (I²t) and high interrupting performance. Silver-plated contact surfaces and non-magnetic hardware ensure dependable long-term operation in critical industrial environments.
The W300675 is ideal for OEM equipment, maintenance and replacement applications where identical electrical ratings and mounting arrangements are required. Always verify the complete part number and electrical characteristics before installation.
Key Advantages
- Ultra-fast aR semiconductor protection.
- Protects IGBTs, thyristors and power semiconductor modules.
- Current-limiting design minimises damaging fault energy.
- High interrupting capacity for demanding industrial applications.
- Integrated striker indicator for fuse status indication.
- Manufactured by Mersen for critical power electronic systems.
Key Features
- Mersen Protistor® Size 72 square body fuse.
- Manufacturer reference W300675.
- Catalogue number A130UD72LI500.
- aR ultra-fast semiconductor protection characteristic.
- Long slotted blade terminals (LI mounting style).
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Low I²t design for enhanced semiconductor protection.
Designed for Critical Semiconductor Protection
The Mersen W300675 has been engineered for modern power conversion equipment requiring rapid fault clearance. Its ultra-fast operating characteristic limits thermal and electrical stress before semiconductor devices reach damaging temperatures, helping maximise equipment reliability while reducing costly downtime.
Its robust ceramic square body construction, silver-plated terminals, non-magnetic hardware and high interrupting capability make it an excellent choice for demanding industrial installations.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters.
- Rectifier equipment.
- Inverter systems.
- UPS installations.
- Renewable energy converters.
- Industrial power electronic equipment.
