Mersen PC73UD13C550EF / A300633 Protistor Size 73 aR High-Speed Semiconductor Fuse, 550 A, 1250V AC
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The Mersen PC73UD13C550EF is a premium ultra-fast acting Protistor® square body fuse-link expertly designed for the robust protection of high-power industrial conversion equipment. Operating with precise aR characteristic tolerances, this Size 73 fuse provides exceptional current limitation and superior thermal cycling endurance to safeguard critical semiconductor devices such as diodes, thyristors, and IGBTs. Engineered with an arc-controlling solidified sand architecture and equipped with silver-plated EF style notched blade connections, it reliably interrupts fault currents up to 126 kA to ensure continuous uptime for commercial UPS systems, heavy motor drives, and advanced inverter setups.
| Product ID (MPN) | PC73UD13C550EF |
| Order Code / Item Number | A300633 |
| Product Series | Protistor® Square Body High-Speed Fuses |
| Fuse Size | Size 73 |
| Speed / Characteristic | aR (Ultra-Fast Acting Semiconductor Protection) |
| Rated Current (In) | 550 A |
| Rated Voltage (AC) | 1250 V AC (IEC) / 1300 V AC (UL) |
| Rated Breaking Capacity | 126 kA AC |
| Terminals / Mounting Style | Type EF (Notched Blade Connections) |
| Pre-arcing I²t | 57 kA²s |
| Clearing I²t at Rated Voltage | 465 kA²s |
| Power Dissipation (at In) | 120 W |
| Weight | 1.11 kg |
| Standards & Certifications | IEC 60269-4, VDE 636-23, UL/CSA Recognized (E76491) |
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