Why Choose the Mersen T076308 Protistor® High-Speed Fuse?
The Mersen T076308 is a Protistor® high-speed cylindrical semiconductor fuse designed to provide rapid short-circuit protection for sensitive power semiconductor devices. Identified by the catalogue number FR27UQ69V250T, it is engineered for industrial power electronics including variable speed drives, UPS systems, inverters and power converters operating on AC networks up to 690 V.
Featuring an aR operating characteristic, the T076308 provides partial-range protection for semiconductors such as IGBTs, SCRs, thyristors and diodes. Its extremely fast current-limiting performance helps minimise thermal and mechanical stress during fault conditions, reducing the risk of costly equipment damage.
With a 250 A current rating, 690 V AC rated voltage and a compact 27 × 60 mm cylindrical body, the fuse incorporates an integrated striker indicator for quick identification after operation, simplifying maintenance and reducing downtime.
Key Advantages
- High-speed aR semiconductor fuse for industrial power electronics.
- 250 A rated current.
- 690 V AC rated voltage.
- Integrated striker indicator for fuse status indication.
- Excellent current-limiting characteristics for semiconductor protection.
- High 200 kA breaking capacity.
Key Features
- Mersen Protistor® series.
- Model: T076308.
- Catalogue number: FR27UQ69V250T.
- 250 A rated current.
- 690 V AC rated voltage.
- 27 × 60 mm cylindrical fuse.
- aR operating characteristic.
- 200 kA interrupt rating.
- Integrated striker indicator.
- Holder mounting.
Reliable Protection for Industrial Power Electronics
Protistor® semiconductor fuses are engineered to interrupt high fault currents before excessive energy reaches sensitive semiconductor devices. Their fast-acting performance helps protect valuable equipment, improve system reliability and reduce maintenance costs in demanding industrial environments.
The Mersen T076308 is suitable for OEM equipment, industrial drives, converters and other power electronic systems requiring dependable semiconductor short-circuit protection in accordance with IEC 60269-1 and IEC 60269-4.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Rectifiers.
- Industrial automation equipment.
