Why Choose the Mersen A076935 Protistor® High-Speed Fuse?
The Mersen A076935, catalogue number A050URB20T13I, is a high-speed cylindrical fuse developed for the protection of sensitive power semiconductor devices. Part of the Mersen Protistor® range, this compact 10 × 38 mm fuse uses an ultra-fast aR operating characteristic to limit damaging thermal and electrodynamic energy during short-circuit conditions.
Rated at 20 A and 500 V AC, the A076935 offers a breaking capacity of up to 50 kA. It is suitable for protecting diodes, thyristors, IGBTs, rectifiers and other semiconductor components used within industrial drives, power converters, control systems and electronic power supplies.
An integrated striker indication system provides clear blown-fuse signalling and can support compatible remote indication equipment. The ceramic body, silver-plated copper ferrules and clip-mounted cylindrical format provide dependable electrical performance while allowing straightforward installation in a compatible 10 × 38 mm fuse holder.
Key Advantages
- Ultra-fast protection for sensitive semiconductor devices.
- 20 A rated current for power-electronics applications.
- Suitable for circuits operating at up to 500 V AC.
- 50 kA breaking capacity for dependable fault interruption.
- Low melting and clearing energy helps minimise semiconductor damage.
- Integrated striker provides rapid blown-fuse indication.
- Compact 10 × 38 mm cylindrical construction.
- Compatible with standard clip-mounted fuse holders of the correct rating.
Key Features
- Mersen item number A076935.
- Catalogue designation A050URB20T13I.
- Protistor® high-speed semiconductor fuse.
- Partial-range aR operating characteristic.
- 20 A nominal current rating.
- 500 V AC IEC voltage rating.
- 50 kA maximum AC breaking capacity.
- 10 × 38 mm cylindrical fuse size.
- Integrated striker indication system.
- Clip-mounted installation.
- Ceramic insulating body.
- Silver-plated copper ferrule terminals.
- Compliant with IEC 60269-1 and IEC 60269-4.
- RoHS compliant.
Ultra-Fast Semiconductor Protection
Power semiconductor components can be damaged by excessive current within a fraction of the operating time of a conventional industrial fuse. The Mersen A076935 uses an aR characteristic to interrupt high short-circuit currents rapidly while limiting the amount of energy passed through to the protected equipment.
The fuse is intended for partial-range semiconductor protection and should be coordinated with suitable overload protection where required. Its low I²t values, compact construction and integrated striker make it particularly suitable for equipment where fast fault clearing, efficient maintenance and reduced downtime are essential.
Typical Applications
- Variable-frequency drives.
- Industrial motor drives.
- Power converters and rectifiers.
- Inverters and UPS equipment.
- Soft starters.
- Semiconductor power supplies.
- Industrial automation equipment.
- Renewable-energy conversion systems.
