Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 170M5388 (PC72UD13C250T) |
| Manufacturer | ABB (Protistor 170M series) |
| Order Code | 3AUA0000090404 |
| Product Type | High-speed semiconductor protection fuse link (aR class) |
| Rated Current (In) | 250 A |
| Rated Voltage (Un) | 1250 V AC (IEC) / 1300 V AC (UL); commonly applied on 690 V AC drive systems |
| Breaking Capacity | 100 kA at rated voltage |
| Utilisation Category | aR, partial-range breaking per IEC 60269-4 |
| Pre-Arcing I²t | 6500 A²s |
| Total Clearing I²t | 38 500 A²s at 1000 V; 51 500 A²s at 1250 V |
| Watt Loss | 65 W at rated current |
| Fuse Size / Body Style | Size 2, square body, flush-end contacts (BKN type) |
| Contact Type | Silver-plated copper flush-end blades, M10 fixing, 74.3 mm centre distance |
| Status Indication | Centre Type K striker pin for microswitch / remote alarm |
| Dimensions | 168 × 124 × 80 mm (body approx. 61 × 75 × 77 mm) |
| Net Weight | 743.5 g |
| Operating Temperature | -25 °C to +70 °C (derating required at elevated temperature) |
| Standards | IEC 60269-4, UL 248-13, CE marked, cULus, RoHS compliant |
Main Features and Advantages
Ultra-fast clearing with very low let-through energy: The defining characteristic of the ABB 170M5388 is its exceptionally low pre-arcing I²t of 6500 A²s combined with a total clearing I²t of 38 500 A²s at 1000 V. Because the thermal damage a semiconductor suffers is proportional to the energy it absorbs, this low let-through value is what allows a 250 A device to protect an IGBT module that would be destroyed in under ten milliseconds. The silver fusible element is profiled so that melting begins at precisely defined constriction points, which makes the response predictable and repeatable rather than dependent on ambient conditions.Arc containment and mechanical integrity: The ABB 170M5388 uses a high-strength ceramic body filled with graded quartz sand. When the element vapourises, the sand absorbs and cools the metallic vapour, so the arc is extinguished inside the body. There is no external venting of hot gas or ionised particles into the cubicle, which protects adjacent control wiring, PLC modules and busbar insulation during a 100 kA interruption. The ceramic housing also resists the mechanical shock of the pressure rise, preventing body rupture at maximum fault levels.Thermal and installation efficiency: With a watt loss of 65 W at rated current, the ABB 170M5388 keeps its contribution to cabinet heat load manageable, an important consideration in sealed IP54 drive enclosures where every watt must be removed by the cooling design. Silver-plated flush-end contacts bolted directly onto the busbar give low and stable contact resistance over the service life, avoiding the localised hot spots and premature ageing that plague clamp-type installations.System integration and diagnostics: The integrated Type K centre striker converts a purely passive protection event into an active diagnostic signal. When the ABB 170M5388 operates, the pin extends and actuates an optional microswitch, feeding a digital input on the drive control board, PLC card or DCS remote I/O. Maintenance staff receive an unambiguous fuse-blown indication instead of having to interpret a vague drive fault code, which measurably reduces mean time to repair.
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