Why Choose the Mersen B220824 High-Speed Fuse?
The Mersen B220824 (D120GC75V50TF) is a high-performance Protistor® square body semiconductor fuse designed to provide fast and dependable protection for power semiconductors, converters and DC electrical systems. Engineered for demanding industrial applications, this high-speed fuse offers outstanding fault current limitation while helping safeguard sensitive semiconductor devices from short-circuit damage.
Part of the proven Mersen Protistor® Size 120 gR 750 V DC series, the B220824 is ideal for railway traction equipment, auxiliary power circuits, battery energy storage systems and industrial power conversion applications. Its square body construction, low power dissipation and high interrupting capability provide reliable long-term performance in critical installations.
With a 50 A current rating, 750 V DC IEC voltage rating and gR operating class, the B220824 delivers full-range semiconductor protection. An integrated striker indicator simplifies maintenance by providing clear fuse status indication when replacement is required.
Key Advantages
- High-speed semiconductor protection fuse for DC power applications.
- 50 A current rating for power electronic equipment.
- 750 V DC IEC voltage rating for demanding industrial systems.
- gR full-range protection for semiconductor devices.
- Integrated striker indicator for easy maintenance.
- Low I²t performance helps minimise damage during fault conditions.
Key Features
- Mersen Protistor® Size 120 series.
- Square body high-speed fuse.
- 50 A rated current.
- 750 V DC IEC rated voltage.
- gR operating class.
- Flush end connections with metric threads.
- Integrated striker indication.
- Designed for railway and industrial DC power systems.
Reliable Protection for DC Power Electronics
High-speed semiconductor fuses are specifically designed to protect sensitive electronic devices from high fault currents. Their rapid operation and low let-through energy help minimise equipment damage, reduce downtime and improve the reliability of industrial power systems.
The Mersen Protistor® range is widely specified for protecting converters, inverters, rectifiers, battery systems and railway equipment where dependable semiconductor protection is essential for continuous operation.
Typical Applications
- Railway traction systems.
- Auxiliary DC power circuits.
- Industrial power converters.
- Battery energy storage systems.
- Variable speed drives and inverters.
- Semiconductor protection in industrial automation.
