Why Choose the Mersen A076820 Protistor® High-Speed Fuse?
The Mersen A076820, catalogue number FR27UD69V63T, is a Protistor® high-speed cylindrical semiconductor fuse designed to provide exceptionally fast protection for sensitive power semiconductor devices. Manufactured in a compact 27 × 60 mm cylindrical format, this aR-class fuse is specifically engineered for protecting diodes, thyristors, IGBTs and other semiconductor components against damaging short-circuit currents.
Rated at 63 A with a 690 V AC IEC voltage rating, the fuse delivers an extremely high breaking capacity of 200 kA. An integrated striker indicator enables rapid identification of a blown fuse and supports remote indication systems for improved maintenance efficiency and reduced equipment downtime.
Complying with IEC 60269-1 and IEC 60269-4, the Mersen Protistor® series is trusted worldwide for protecting power electronic equipment used in industrial drives, renewable energy systems, UPS installations and converter technology where rapid fault interruption is essential.
Key Advantages
- Specially designed for semiconductor protection.
- 63 A current rating.
- 690 V AC IEC voltage rating.
- 200 kA breaking capacity for outstanding fault protection.
- Ultra-fast aR operating characteristic.
- Integrated striker indicator for blown fuse indication.
- Compact 27 × 60 mm cylindrical design.
- Suitable for demanding industrial power electronics.
Key Features
- Mersen part number A076820.
- Catalogue designation FR27UD69V63T.
- Protistor® semiconductor protection fuse.
- High-speed aR characteristic.
- 63 A current rating.
- 690 V AC IEC rating.
- 27 × 60 mm cylindrical body.
- Integrated striker indication.
- Ceramic body construction.
- Silver-plated copper ferrule terminals.
- Clip-mounted installation.
- RoHS compliant.
Fast Protection for Power Electronics
Semiconductor devices require protection that operates significantly faster than conventional industrial fuses. The Mersen A076820 is engineered with an aR characteristic to interrupt high fault currents before excessive thermal energy can damage expensive semiconductor components, helping maximise equipment reliability and minimise downtime.
Its compact cylindrical design, high interrupting capacity and integrated striker make it an excellent choice for modern power conversion equipment where rapid fault detection and dependable protection are essential.
Typical Applications
- Variable frequency drives (VFDs).
- Power converters.
- Industrial inverters.
- UPS systems.
- Soft starters.
- Renewable energy converters.
- Semiconductor power supplies.
- Industrial motor control equipment.
