Why Choose the Mersen B076936 A050URL25T13I Protistor® High-Speed Fuse?
The Mersen B076936, also identified by catalogue number A050URL25T13I, is a compact Protistor® high-speed cylindrical semiconductor fuse with striker. It is specifically designed to protect sensitive power semiconductor devices by rapidly interrupting damaging short-circuit currents in industrial power electronic systems.
As part of the Mersen Protistor® 10 × 38 aR range, this fuse combines fast current-limiting performance with an extremely high breaking capacity. Its low let-through energy helps reduce electrical and thermal stress on components such as IGBTs, thyristors, power diodes and rectifiers, supporting improved equipment reliability and reduced downtime.
With a rated current of 25 A, a rated voltage of 500 V AC and a maximum breaking capacity of 50 kA, the B076936 is suitable for drives, converters, power supplies and industrial control equipment. Its integrated striker provides mechanical fuse-operation indication for compatible fuse holders and monitoring accessories.
Key Advantages
- Ultra-fast aR fuse for power semiconductor short-circuit protection.
- 25 A rated current for industrial power electronic circuits.
- 500 V AC IEC voltage rating.
- High 50 kA breaking capacity for effective fault interruption.
- Integrated mechanical striker supports fuse-status indication.
- Compact 10 × 38 mm cylindrical format for clip-mounted fuse holders.
Key Features
- Mersen Protistor® semiconductor protection fuse.
- Item number: B076936.
- Catalogue number: A050URL25T13I.
- 25 A rated current.
- 500 V AC IEC rated voltage.
- aR utilisation category for partial-range semiconductor protection.
- 50 kA maximum AC breaking capacity.
- Integrated striker indication system.
- Silver-plated copper ferrule terminals.
- Durable ceramic fuse body.
Reliable Protection for Power Semiconductors
High-speed semiconductor fuses such as the Mersen B076936 are designed to interrupt severe fault currents before excessive energy reaches vulnerable electronic components. Their rapid current-limiting action helps minimise damage to semiconductors and surrounding equipment, supporting longer service life and improved system availability.
The aR operating characteristic provides partial-range protection against short-circuit currents. Separate overload protection is normally required elsewhere within the electrical circuit. The integrated striker can also activate compatible indication or monitoring equipment when the fuse operates.
Typical Applications
- Variable frequency drives and motor-control equipment.
- Industrial power converters and rectifiers.
- Inverters and switching power supplies.
- Uninterruptible power supply systems.
- Industrial automation control panels.
- Semiconductor-controlled heating equipment.
- Power electronic assemblies and OEM machinery.
