The Bussmann 170M5459 is a high-performance current-limiting fuse designed for high-voltage applications up to 5.5kV. As industrial equipment becomes more power-intensive, this 170M series fuse has become a go-to solution for engineers seeking reliable overcurrent protection in demanding environments. With a compact 30mm diameter design, it delivers exceptional 200kA interrupting capacity while maintaining UL and IEC certifications.
In a recent steel plant retrofit project, the 170M5459 demonstrated its value by protecting a 4,000kW induction furnace power supply. When a thyristor module failed during startup, the fuse cleared the 18kA fault current within 3 milliseconds, preventing cascading damage to $2M worth of power electronics. Maintenance teams particularly appreciate its dual indicator pins that provide visual confirmation of operation – a critical feature when troubleshooting complex systems.
Renewable energy applications also benefit from this fuse’s wide temperature tolerance (-50°C to +125°C). A solar farm in Arizona reported 99.98% uptime after upgrading to 170M5459 fuses in their 1,500V DC combiner boxes, where traditional fuses failed prematurely due to desert temperature swings. The nickel-plated brass end caps ensure stable conductivity even in high-humidity coastal wind turbine installations.
Data centers are now adopting this model for 480V UPS systems. Lab tests show the 170M5459 withstands 100,000+ operational cycles with less than 5% resistance drift, outperforming comparable fuses by 40% in lifespan. Its sand-filled construction provides arc suppression that meets NFPA 79 safety standards for industrial machinery.
With 85% of surveyed electrical engineers prioritizing maintenance-free components, the 170M5459’s sealed design eliminates contamination risks in dusty manufacturing environments. Its 170ms minimum melting time at 500% rated current makes it ideal for coordinating with circuit breakers in selective coordination schemes. For OEMs developing next-gen power converters, this fuse’s 550A continuous rating supports higher density designs without sacrificing protection margins.
