Mersen PC73UD13C800TF / P300511 Protistor Size 73 aR High-Speed Fuse, 800A, 1250VAC
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The Mersen PC73UD13C800TF (Reference Number: P300511) is an ultra-fast-acting Protistor® square body fuse-link designed for the protection of high-power semiconductor devices. Part of the Size 73 series, this fuse is rated for 800A at 1250VAC (IEC), providing essential high-speed interruption during short-circuit faults to safeguard diodes, thyristors, and IGBT modules. Engineered with a high breaking capacity of 126kA and low I²t let-through values, it minimizes thermal and electromagnetic stress on downstream components. The TTF (Tapped Terminal Face) configuration utilizes M12 threaded holes for a direct, high-conductivity connection in heavy-duty industrial power converters and rectifiers.
| Manufacturer | Mersen (Ferraz Shawmut) |
| Catalog Number | PC73UD13C800TF |
| Reference Number | P300511 |
| Fuse Size | Size 73 |
| Rated Current (In) | 800 A |
| Rated Voltage (AC) | 1250 VAC (IEC) / 1300 VAC (UL) |
| Utilization Category | aR (Ultra-fast-acting) |
| Breaking Capacity | 126 kA @ 1250VAC |
| Mounting Type | TTF (M12 Tapped Face) |
| Visual Indicator | Trip-indicator (microswitch adaptable) |
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