Why Choose the Mersen S220954 High-Speed Semiconductor Fuse?
The Mersen S220954 is a premium Protistor® square body high-speed semiconductor fuse designed to provide exceptional protection for power semiconductor devices operating in demanding DC applications. As part of the proven Mersen Protistor® Size 122 gR 750 VDC series, it delivers rapid fault interruption to minimise damage to sensitive components while maximising system reliability.
Developed for railway power systems, industrial converters and DC power electronics, the S220954 combines low I²t performance, high breaking capacity and low power dissipation. Its square body construction with flush metric threaded terminals and integrated striker allows straightforward installation while ensuring dependable operation in harsh industrial environments.
With a rated current of 500 A and a 750 V DC IEC voltage rating, the Mersen S220954 is ideally suited to protecting IGBTs, thyristors, diodes and other semiconductor devices used in high-power DC applications.
Key Advantages
- High-speed semiconductor protection fuse for demanding DC applications.
- 500 A current rating for high-power equipment.
- 750 V DC IEC voltage rating for industrial power systems.
- Ultra-fast gR characteristic helps minimise damage to semiconductor devices.
- Integrated striker mechanism for fuse operation indication.
- 100 kA DC breaking capacity provides dependable fault interruption.
Key Features
- Mersen Protistor® Size 122 gR series.
- 500 A rated current.
- 750 V DC IEC rated voltage.
- 100 kA DC breaking capacity.
- Square body construction with flush metric threaded terminals.
- Integrated striker for blown fuse indication.
- Low I²t design for superior semiconductor protection.
- Suitable for railway, industrial and power conversion systems.
Reliable Protection for High-Power Electronics
High-speed semiconductor fuses are specifically engineered to protect sensitive power electronic devices against damaging short circuits. Their extremely fast response limits fault energy, helping reduce equipment damage, minimise downtime and extend the operational life of critical components.
The Mersen Protistor® range is widely trusted by engineers for railway traction systems, industrial DC drives, renewable energy installations, UPS systems and other demanding power conversion applications requiring dependable semiconductor protection.
Typical Applications
- Railway traction and auxiliary power systems.
- Industrial DC drives and converters.
- Battery energy storage systems.
- UPS and backup power equipment.
- Renewable energy power conversion systems.
- Protection of IGBTs, thyristors and semiconductor modules.
