Mersen A130UD73TTI315 / Z301046 Protistor Fuse, 315A 1250VAC, High-Speed Square Body Size 73

The Mersen A130UD73TTI315 (Z301046) is a high-speed square body fuse-link from the Protistor® Size 73 series. This ultra-fast acting fuse is specifically engineered to provide state-of-the-art protection for power semiconductor devices, including diodes, thyristors, and IGBTs. It is designed for high-voltage power conversion applications where rapid clearing of fault currents and low let-through energy (I²t) are critical for circuit integrity.

Key Features

• Semiconductor Grade Protection: Utilization category "aR" ensures ultra-fast response times to protect sensitive electronic components from overcurrent damage.
• High Power Capacity: Rated for 315A and up to 1300VAC (UL), making it suitable for heavy industrial power conversion environments.
• Superior Arc Control: Constructed with die-cut elements embedded in solidified sand, which effectively controls arcing characteristics to achieve a high interrupting rating of 126kA.
• Enhanced Connectivity: Features silver-plated brass contact surfaces and non-magnetic hardware for low resistance and reliable electrical performance.
• Integrated Monitoring: Includes a built-in mechanical striker that provides visual fault confirmation and is compatible with field-mountable microswitches for remote signaling.
• Standardized Mounting: Equipped with flush-end terminals and UNC threads for secure bolted installation in standardized equipment designs.

Technical Specifications

• Manufacturer: Mersen
• Catalogue Number: A130UD73TTI315
• Item Number: Z301046
• Current Rating: 315A
• Voltage Rating: 1250VAC (IEC) / 1300VAC (UL)
• Breaking Capacity: 126kA at Rated Voltage
• Utilization Category: aR (High-Speed Semiconductor Protection)
• Fuse Size: 73
• Terminal Type: Flush Ends (UNC Threads)
• Melting I²t: 12 kA²s
• Clearing I²t: 95 kA²s (At Rated Voltage)
• Power Dissipation: 84W at Rated Current
• Body Material: High-Grade Ceramic
• Indicator System: Striker Included