Why Choose the Mersen D076823 Protistor® High-Speed Fuse?
The Mersen D076823 (FR27UD69V125T) is a premium Protistor® high-speed cylindrical semiconductor fuse engineered to provide rapid short-circuit protection for sensitive power semiconductor devices. Featuring an aR operating characteristic, it is specifically designed to protect IGBTs, thyristors, SCRs, diodes and rectifiers used in industrial power electronic equipment. The integrated striker indicator enables fast identification of an operated fuse, helping to minimise maintenance time and system downtime.
Manufactured in accordance with IEC 60269-1 and IEC 60269-4, the FR27UD69V125T features a robust 27 × 60 mm cylindrical design with an exceptionally high interrupting capacity. Its current-limiting design and low energy let-through characteristics help prevent costly damage to power semiconductor devices during fault conditions.
Rated at 125 A with a 690 V AC IEC voltage rating, this Protistor® fuse is ideally suited for industrial drives, UPS systems, power converters, inverters and renewable energy applications where reliable semiconductor protection is essential.
Key Advantages
- High-speed aR semiconductor protection fuse.
- 125 A current rating for industrial power electronics.
- 690 V AC IEC rated voltage.
- Integrated striker indication for rapid maintenance.
- 200 kA AC breaking capacity.
- Low I²t current-limiting performance protects sensitive semiconductor devices.
Key Features
- Mersen Protistor® Size 27 × 60 URGD series.
- Catalogue number: FR27UD69V125T.
- 125 A rated current.
- 690 V AC IEC rated voltage.
- aR operating class for semiconductor short-circuit protection.
- Integrated striker-type blown fuse indicator.
- High interrupting capacity of 200 kA.
- Ceramic body with silver-plated ferrule terminals.
Reliable Protection for Power Electronics
High-speed semiconductor fuses such as the Mersen FR27UD69V125T interrupt fault currents before excessive thermal energy can damage expensive power semiconductor devices. Their low energy let-through characteristics help improve equipment reliability while reducing maintenance costs and production downtime.
The Protistor® range is trusted worldwide for protecting variable frequency drives, industrial inverters, UPS systems, renewable energy installations and power conversion equipment where dependable semiconductor protection is critical.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- Power converters.
- UPS systems.
- Renewable energy equipment.
- Industrial automation and control panels.
