Why Choose the Mersen H076620 Protistor® High-Speed Fuse?
The Mersen H076620 is a high-performance Protistor® cylindrical semiconductor fuse designed to protect sensitive power electronic components in demanding DC circuits. Rated at 50 A and 440 V DC, it provides rapid fault interruption to help limit the thermal and electrical energy transferred to semiconductor devices during overload and short-circuit conditions.
Part of the Mersen Protistor® 14 × 51 mm gLB series, the H076620 offers full-range protection for power semiconductors while supporting selective coordination with other distribution circuit fuses. Its extremely high interrupting capability makes it suitable for installations where rapid fault clearance and dependable protection are essential.
The fuse incorporates an integrated striker indicator, silver-plated copper contacts and a robust ceramic body. Its compact, clip-mounted cylindrical design enables straightforward installation in compatible fuse holders within rectifiers, inverters, uninterruptible power supplies, railway auxiliary circuits and industrial motor control equipment.
Key Advantages
- High-speed gLB semiconductor protection characteristic.
- 50 A rated current for demanding power electronic circuits.
- 440 V DC voltage rating for industrial DC systems.
- Provides protection against overload and short-circuit currents.
- Integrated striker enables clear fuse-operation indication.
- Compact cylindrical design supports simple installation and replacement.
Key Features
- Mersen Protistor® high-speed fuse series.
- 50 A rated current.
- 440 V DC rated operating voltage.
- gLB operating characteristic.
- 14 × 51 mm cylindrical fuse format.
- Integrated striker indication system.
- Clip mounting for compatible cylindrical fuse holders.
- Silver-plated copper contacts.
- Durable ceramic fuse body.
- RoHS compliant.
High-Speed Protection for Power Electronic Equipment
Power semiconductor components can be damaged by excessive fault energy before conventional circuit protection has time to operate. The Mersen H076620 is engineered to clear overload and short-circuit currents rapidly, helping reduce electrical and thermal stress on diodes, thyristors, rectifiers and other sensitive semiconductor assemblies.
Its gLB characteristic provides full-range protection while helping engineers achieve selective coordination between protective devices. The integrated striker also simplifies fault identification and may be used with compatible signalling or switching accessories to support maintenance and system monitoring.
Typical Applications
- Industrial rectifiers.
- Power inverters and converters.
- Uninterruptible power supply systems.
- Railway traction auxiliary circuits.
- Reduced-voltage motor starters.
- Industrial DC power supplies.
- Protection of diodes, thyristors and semiconductor modules.
