Mersen PC91UK15C225TF Protistor High-Speed Fuse, 225A 1500VAC, Size 91 aR, Square Body Flush End with Striker (B076154)

Mersen Protistor® High-Speed Semiconductor Protection Fuse | 225A 1500VAC

The Mersen PC91UK15C225TF (Part Number: B076154) is a high-performance square body fuse-link from the Protistor® series, engineered for the ultra-fast protection of power semiconductor devices. This Size 91 fuse is specifically designed for 1500VAC applications with a rated current of 225A, making it an essential component for modern power conversion equipment including SCRs, diodes, thyristors, GTOs, and IGBTs.

Constructed with the URK design specification, the fuse features pure silver die-cut elements encapsulated in high-stability solidified sand. This internal architecture provides precise control over arcing characteristics, ensuring high breaking capacity (200kA) and low I²t values to minimize downstream damage during fault conditions. The unit is built with silver-plated brass contact surfaces and non-magnetic materials to maintain high electrical efficiency. For operational monitoring, it includes an integrated mechanical striker (trip-indicator) that can trigger a field-mountable microswitch for remote fault detection.

Key Features:

• Semiconductor Grade Protection: aR utilization category optimized for high-speed clearing of fault currents.
• Extreme Breaking Capacity: Rated for 200kA at 1500VAC, providing robust protection in high-power industrial circuits.
• Advanced Internal Design: Features silver die-cut elements and a ceramic body for superior thermal and electrical stability.
• Status Indication: Equipped with a built-in striker to provide immediate visual confirmation and optional remote signaling.
• Flush End Mounting: Metric thread flush ends ensure a secure, low-resistance bolted connection.

Technical Specifications:

• Manufacturer: Mersen
• Catalog Number: PC91UK15C225TF
• Item Number: B076154
• Rated Current (In): 225A
• Rated Voltage (Un): 1500VAC (IEC)
• Utilization Category: aR
• Breaking Capacity: 200kA
• Clearing I²t (at 1500V): 78 kA²s
• Power Dissipation: 58.5W
• Indication: Striker System
• Terminal Type: Flush ends (Metric threads)
• Size: Size 91
• Body Material: Ceramic
• Total Weight: 0.789 kg
• Standards Compliance: IEC 60269-4