Mersen PC91UH15C350TF Protistor High-Speed Fuse, 350A 1500VAC, Size 91 aR, Square Body Flush End with Striker (E076157)

Mersen Protistor® High-Speed Semiconductor Protection Fuse | 350A 1500VAC

The Mersen PC91UH15C350TF (Part Number: E076157) is an ultra-fast square body fuse-link from the Protistor® series, professionally designed for the protection of high-power semiconductor devices. This Size 91 fuse is optimized for 1500VAC systems with a 350A current rating, offering premium protection for SCRs, diodes, thyristors, GTOs, and IGBT devices in power conversion applications.

Utilizing a high-performance URH design, the fuse contains terminal elements made of pure silver die-cut foil, precisely positioned within a ceramic body filled with solidified high-purity sand. This ensures superior clearing speed and extremely low I²t levels to prevent damage to sensitive downstream electronics. The unit features silver-plated brass flush-end contacts with metric threads for high-integrity bolted connections. To ensure system reliability and maintenance efficiency, it is equipped with a mechanical striker that serves as a visual trip indicator and can be integrated with a microswitch for remote fault monitoring.

Key Features:

• High-Speed Protection: aR utilization category specifically tuned for semiconductor short-circuit protection.
• Large Breaking Capacity: Rated to safely interrupt up to 200kA at 1500VAC.
• Optimized Thermal Performance: Low power dissipation (66W at rated current) to minimize heat build-up in industrial cabinets.
• Reliable Indication: Integrated striker system for immediate status verification, supporting field-mountable microswitches.
• Industrial Standard Compatibility: Complies with IEC 60269-4 standards for global semiconductor application acceptance.

Technical Specifications:

• Manufacturer: Mersen (formerly Ferraz Shawmut)
• Series: Protistor® Square Body PSC
• Catalog Number: PC91UH15C350TF
• Item Number: E076157
• Rated Current (In): 350 A
• Rated Voltage (Un): 1500 VAC
• Utilization Category: aR
• Breaking Capacity (I.R.): 200 kA
• Maximum Clearing I²t: 466 kA²s
• Power Dissipation (at In): 66 W
• Fuse Size: 91
• Mounting Type: Flush Ends (Bolted)
• Indication System: Mechanical Striker
• Standards: IEC 60269-4