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The Ferraz Shawmut Protistor Fuse A300058 (690VAC, 350A) is a high-speed semiconductor fuse specially designed for electric vehicles (EVs) and hybrid vehicles. Unlike traditional automotive fuses, this advanced Protistor fuse delivers ultra-fast protection for high-voltage circuits (400V–800V+), safeguarding critical components such as:
Battery pack & charging system – Prevents short-circuit damage, thermal runaway, and fire risks during fast charging.
Drive motor & controller (IGBTs, inverters) – Protects expensive semiconductor devices from destructive short-circuit currents.
Onboard charger (OBC), DC/DC converter, A/C compressor – Ensures reliable overcurrent and short-circuit protection for auxiliary high-voltage systems.
Crash & collision safety – Immediately disconnects the high-voltage circuit to protect passengers and first responders.
With millisecond response time, the Protistor A300058 acts as the “safety guardian” of EV high-voltage systems, ensuring maximum safety and reliability.
✅ Rated Voltage: 690VAC
✅ Rated Current: 350 Amps
✅ Application: EV battery packs, inverters, motor controllers, OBC, DC/DC converters, high-voltage auxiliary systems
This fast-acting semiconductor fuse is widely adopted in new energy vehicles, renewable energy systems, and industrial high-power electronics.
