ABB 170M5388 Fuse-Link: PC72UD13C250T 690V AC/DC High-Speed Fuse

Technical Specifications

Main Features and Advantages

The ABB 170M5388​ fuse excels through its exceptional current-limiting performance. Under short-circuit conditions, it operates with extreme speed, interrupting the fault current before it reaches its prospective peak. This current-limiting action drastically reduces the thermal and electrodynamic stress on the entire power circuit, which is the primary mechanism for protecting vulnerable semiconductors. The fuse’s precisely calibrated time-current characteristic ensures that it provides reliable protection for overloads while remaining stable during harmless inrush currents, such as those experienced during motor starting or capacitor charging. The PC72UD13C250T​ is designed with a high breaking capacity, meaning it can safely interrupt the maximum prospective fault current available in an industrial power system without sustaining damage or presenting a safety hazard, a critical feature for maintaining system integrity.Stable Performance and Robust Construction: A key advantage of the 170M5388​ fuse-link is its stability and consistency. The use of a ceramic body and quartz sand filler ensures excellent arc quenching properties and provides high mechanical strength and thermal endurance. This construction prevents the fuse characteristics from drifting over time or due to normal operating temperature cycles, guaranteeing that the protection remains coordinated with the semiconductor throughout the equipment’s lifespan. The fuse element is designed for low power loss, contributing to overall system efficiency. Furthermore, the ABB 170M5388​ is engineered for clear functional separation; when it operates, the fusible element vaporizes completely, providing a definitive and visible indication of operation (often supplemented by a mechanical striker pin for remote alarm signaling). This reliability and diagnostic capability make it an indispensable safety component, ensuring that a faulted fuse is easily identified and replaced, restoring protection to the system.

Application Field

The ABB 170M5388 (PC72UD13C250T)​ high-speed fuse is predominantly deployed in the power circuits of medium to high-power frequency converters and drives. In an AC drive, it is typically installed on the DC bus link or directly in the input rectifier stage to protect the diodes and the DC link capacitors from catastrophic short-circuit faults. This application is critical in industries like mining, where drives powering conveyors and crushers are subject to demanding conditions, and in water treatment plants for large pump controls. The 170M5388​ ensures that an internal fault in the drive’s power section is isolated, preventing damage from propagating to the incoming supply or causing extensive internal destruction.Beyond VFDs, this fuse is essential in DC drive systems, protecting the thyristors in the converter bridges. It is also a standard protection device in soft starters for large motors, AC/DC rectifier units for DC power supplies, and Uninterruptible Power Supply (UPS) systems. In renewable energy, the ABB 170M5388​ can be found in the power conversion stages of solar inverters and wind turbine converters. Essentially, any industrial application utilizing power electronics for controlled conversion of electrical power—including metal processing (rolling mills), plastics extrusion, and test benches—relies on high-speed fuses like the PC72UD13C250T. Its 690V rating makes it suitable for standard industrial 400V/480V three-phase systems with an appropriate safety margin, safeguarding the significant capital investment in power electronic equipment and preventing expensive production downtime due to semiconductor failure.