Why Choose the Mersen J209308 High Voltage DIN Back-up Fuse?
The Mersen J209308 is a high quality DIN high voltage back-up fuse engineered to protect medium voltage transformers from the damaging effects of short-circuit currents. As part of the proven Mersen Limitor®-P series, it provides dependable fault interruption for high voltage switchgear, substations and industrial power distribution systems.
Manufactured in accordance with IEC 60282-1, the J209308 uses pure silver fuse elements, silver-coated copper end caps and a durable ceramic body to deliver excellent current-limiting performance and long operational life. The integrated 80 N striker enables operation with compatible switchgear trip mechanisms for enhanced system safety.
With a rated voltage of 12 kV AC, a rated current of 20 A and compact 56 mm × 292 mm DIN dimensions, the Mersen J209308 is ideally suited for transformer protection in utility, commercial and industrial medium voltage installations.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage for high voltage distribution systems.
- 20 A current rating for compatible transformer applications.
- Integrated 80 N striker for compatible switchgear mechanisms.
- Current-limiting design helps reduce fault energy and equipment damage.
- Manufactured using premium ceramic, silver and copper materials.
Key Features
- Mersen Limitor®-P high voltage DIN back-up fuse.
- Catalogue number: 45DB120V20P.
- 12 kV AC rated voltage.
- 20 A rated current.
- 56 mm diameter × 292 mm length.
- Integrated 80 N thermal striker.
- Designed in accordance with IEC 60282-1.
- Suitable for transformer and switchgear protection.
Medium voltage back-up fuses rapidly interrupt high prospective fault currents before they can damage transformers and associated switchgear. Their current-limiting characteristics reduce thermal and mechanical stress, helping improve equipment reliability and minimise downtime.
The Mersen Limitor®-P range has been trusted worldwide for transformer protection in substations and industrial electrical networks. The integrated striker mechanism allows operation with compatible switchgear to provide additional system protection following fuse operation.
Typical Applications
- Medium voltage transformer protection.
- Utility substations.
- Industrial electrical distribution systems.
- High voltage switchgear.
- Power distribution infrastructure.
- OEM medium voltage equipment.
