Mersen PC91UF15C125TF Protistor High-Speed Fuse, 125A 1500VAC, Size 91 aR, Square Body Flush End with Striker (X076150)

Mersen Protistor® High-Speed Semiconductor Protection Fuse | 125A 1500VAC

The Mersen PC91UF15C125TF (Part Number: X076150) is a high-performance square body fuse-link belonging to the Protistor® series. It is specifically engineered to provide state-of-the-art protection for power semiconductor devices, including SCRs, diodes, thyristors, GTOs, and IGBT devices. Rated for 1500VAC and 125A, this Size 91 fuse is optimal for high-demand power conversion equipment.

Designed with URF technical specifications, the fuse contains pure silver die-cut elements encapsulated in solidified sand. This configuration allows for precise control of arcing characteristics, ensuring a very low I²t clearing value and a massive breaking capacity of 200kA. The construction features silver-plated brass contact surfaces and non-magnetic hardware to ensure maximum conductivity and efficiency. Each unit comes equipped with a low-voltage striker/trip-indicator, capable of triggering a field-mountable microswitch for real-time system monitoring.

Key Features:

• Ultrafast Action: aR utilization category provides high-speed protection for sensitive semiconductor circuits.
• High Interrupting Capacity: Rated at 200kA at 1500VAC, ensuring robust protection under severe fault conditions.
• Premium Materials: Pure silver elements and ceramic body offer high thermal stability and reliability.
• Integrated Indication: Includes a mechanical striker for visual indication and remote signaling via microswitch.
• Low Power Loss: Optimized design results in a power dissipation of only 43W at rated current.

Technical Specifications:

• Brand: Mersen
• Series: Protistor® Size 91 aR
• Model/Catalog No: PC91UF15C125TF
• Item Number: X076150
• Rated Current: 125A
• Rated Voltage: 1500VAC (IEC)
• Utilization Category: aR (High-speed Semiconductor Protection)
• Breaking Capacity: 200kA
• Clearing I²t at Rated Voltage: 15 kA²s
• Power Dissipation: 43W
• Terminal Type: Flush ends (Metric threads)
• Body Material: High-grade Ceramic
• Dimensions: 51mm (W) x 62mm (H) x 101mm (L)
• Standards: IEC 60269-4