Mersen PC73UD13C450EF / Y300631 Protistor Size 73 aR High-Speed Semiconductor Fuse, 450 A, 1250V AC
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The Mersen PC73UD13C450EF is a premium ultra-fast acting Protistor® square body fuse-link expertly engineered to safeguard precision industrial power conversion equipment. Operating within the strict performance parameters of the aR characteristic class, this Size 73 fuse delivers industry-leading current limitation and exceptional thermal cycling endurance for the optimal protection of sensitive diodes, thyristors, and IGBTs. Housed in a robust 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 high-power motor drives, inverters, and critical enterprise UPS systems.
| Product ID (MPN) | PC73UD13C450EF |
| Order Code / Item Number | Y300631 |
| Product Series | Protistor® Square Body High-Speed Fuses |
| Fuse Size | Size 73 |
| Speed / Characteristic | aR (Ultra-Fast Acting Semiconductor Protection) |
| Rated Current (In) | 450 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 | 35.5 kA²s |
| Clearing I²t at Rated Voltage | 290 kA²s |
| Power Dissipation (at In) | 100 W |
| Weight | 1.11 kg |
| Standards & Certifications | IEC 60269-4, VDE 636-23, UL/CSA Recognized (E76491) |
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