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Mersen A065UD73TTI1800 / R300878 Protistor Size 73 aR Semiconductor Protection Fuse, 600V AC (IEC) / 650V AC (UL), 1800A
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$600.00 USD
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The Mersen A065UD73TTI1800 is a Protistor® Size 73 aR ultra-fast acting square body semiconductor protection fuse-link rated at 1800 A and 600 VAC (IEC) / 650 VAC (UL). Featuring 1/2"-13 unified coarse threaded terminals (TTI type), it delivers superior current limiting performance with a very low pre-arcing I²t of 2040 kA²s for maximum protection of diodes, thyristors, and IGBT devices. UL/CSA Recognized (E76491) and IEC 60269-4 compliant, this fuse is designed for inverters, motor drives, and UPS systems operating at 690 V or less.
| Product ID (MPN) | A065UD73TTI1800 |
| Item Number | R300878 |
| Brand | Mersen |
| Series | Protistor® Size 73 |
| Product Type | Semiconductor Protection Fuse-Link, Square Body, High-Speed AC |
| Speed / Characteristic | aR (Ultra-Fast Acting, Current Limiting) |
| Rated Current (In) | 1800 A |
| Rated Voltage AC — IEC | 600 V |
| Rated Voltage AC — UL | 650 V |
| Rated Breaking Capacity AC | 200 kA |
| Pre-Arcing I²t | 2040 kA²s |
| Clearing I²t at Rated Voltage | 7150 kA²s |
| Power Dissipation at In | 206 W |
| Terminal Type | TTI — 1/2"-13 Unified Coarse Threaded Terminals (Ø 46 mm boss, Ø 1/2" UNC thread) |
| Body Size | 73 (Square Body) |
| Dimensions (W × H × D) | 73 ± 1.4 mm × 107.6 mm × 78.5 mm |
| Terminal Boss Diameter | Ø 46 mm |
| Terminal Overall Length | 74 +2/−0.8 mm |
| Anti-Rotation Holes | 2× Ø5 mm |
| Contact Surface | Silver Plated; Non-Magnetic Hardware |
| Trip Indicator | Low Voltage Trip-Indicator compatible; Field-Mountable Microswitch optional |
| Weight | 1.25 kg |
| Package Quantity | 1 |
| UL/CSA Certification | UL/CSA Recognized — E76491 ✓ |
| Standards | IEC 60269-4; VDE 636-23 (aR Class); CCC GB 13539.4 (Asia); CE Marking (≤1000 VAC) |
| Applications | Protection of Inverters, Motor Drives, UPS Systems; Diodes, Thyristors, IGBT Devices; ≤690 V Equipment |
| Datasheet Reference | DS-PFC67AB73-17-1224_EN |
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