Mersen PC73UD13C350EF / W300629 Protistor Size 73 aR High-Speed Semiconductor Fuse, 350 A, 1250V AC
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The Mersen PC73UD13C350EF is a premium ultra-fast acting Protistor® square body fuse-link expertly designed to protect highly sensitive industrial power conversion equipment. Operating within the precise parameters of the aR characteristic class, this Size 73 fuse provides exceptional current limitation and thermal cycling performance, making it completely optimized for the protection of diodes, thyristors, and IGBTs. Housed in a robust arc-controlling solidified sand architecture and fitted 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 and intensive motor drives.
| Product ID (MPN) | PC73UD13C350EF |
| Order Code / Item Number | W300629 |
| Product Series | Protistor® Square Body High-Speed Fuses |
| Fuse Size | Size 73 |
| Speed / Characteristic | aR (Ultra-Fast Acting Semiconductor Protection) |
| Rated Current (In) | 350 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 | 17 kA²s |
| Clearing I²t at Rated Voltage | 140 kA²s |
| Power Dissipation (at In) | 86 W |
| Weight | 1.11 kg |
| Standards & Certifications | IEC 60269-4, VDE 636-23, UL/CSA Recognized (E76491) |
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