Mersen PC91UH15C250TF Protistor High-Speed Fuse, 250A 1500VAC, Size 91 aR, Square Body Flush End with Striker (C076155)

Mersen Protistor® High-Speed Semiconductor Protection Fuse | 250A 1500VAC

The Mersen PC91UH15C250TF (Part Number: C076155) is a high-performance square body fuse-link within the Protistor® series, specifically engineered for the ultra-fast protection of power semiconductor devices. This Size 91 fuse is designed for 1500VAC applications with a 250A rating, providing ultimate protection for critical power conversion equipment such as SCRs, diodes, thyristors, GTOs, and IGBTs.

Constructed following the URH design specification, the fuse features pure silver die-cut elements embedded in solidified sand. This technology ensures precise control of arcing characteristics, facilitating extremely low I²t clearing values and a very high breaking capacity of 200kA. The contact surfaces are silver-plated brass with non-magnetic hardware to ensure high conductivity and thermal stability. The fuse is equipped with a low-voltage striker system, serving as a mechanical trip-indicator that can operate a field-mountable microswitch for remote monitoring.

Key Features:

• Ultrafast Semiconductor Protection: aR characteristic provides high-speed response to protect sensitive power electronics.
• High Interrupting Rating: Rated for 200kA at 1500VAC, ideal for protecting high-energy industrial circuits.
• Low Energy Let-Through: Optimized for low I²t to minimize stress on downstream components during faults.
• Integrated Indication: Includes a mechanical striker for immediate visual status and remote signaling compatibility.
• Durable Construction: Built with a ceramic body and silver-plated terminals for reliable performance in demanding environments.

Technical Specifications:

• Manufacturer: Mersen
• Series: Protistor® Size 91 aR
• Catalog Number: PC91UH15C250TF
• Item Number: C076155
• Rated Current: 250A
• Rated Voltage: 1500VAC (IEC)
• Utilization Category: aR (High-speed Semiconductor Protection)
• Breaking Capacity: 200kA
• Clearing I²t at Rated Voltage: 246 kA²s
• Power Dissipation: 47W
• Terminal Type: Flush ends (Metric threads)
• Body Material: High-grade Ceramic
• Dimensions: 51mm (W) x 62mm (H) x 101mm (L)
• Standards Compliance: IEC 60269-4