Why Choose the Mersen T1000126 High Voltage DIN Back-up Fuse?
The Mersen T1000126 is a high performance Limitor®-PT high voltage DIN back-up fuse engineered to provide reliable short-circuit protection for medium voltage transformers. Identified by catalogue number 45DB120V25PT, it features controlled power dissipation, making it ideal for modern switchgear where reduced heat generation and dependable long-term performance are essential.
Designed in accordance with IEC 60282-1, the Limitor®-PT range uses a ceramic fuse body, pure silver fuse elements and silver-plated copper end caps to deliver consistent current-limiting performance. The integrated 80 N controlled power dissipation striker enables reliable operation with compatible switchgear whilst helping to minimise thermal stress within enclosed installations.
Rated at 12 kV AC with a 25 A current rating, the T1000126 has a 56 mm diameter and 292 mm overall length. It is ideally suited to transformer protection in utility substations, industrial power distribution systems and medium voltage switchgear.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 12 kV AC rated voltage.
- 25 A rated current.
- Controlled power dissipation reduces heat build-up within switchgear.
- 63 kA breaking capacity for dependable fault interruption.
- Integrated 80 N striker for coordinated switchgear operation.
Key Features
- Mersen Limitor®-PT series.
- High voltage DIN back-up fuse.
- 12 kV AC IEC rated voltage.
- 25 A rated current.
- 56 mm diameter × 292 mm fuse size.
- 63 kA maximum AC breaking capacity.
- Controlled power dissipation technology.
- Integrated 80 N striker.
- Ceramic body with pure silver fuse elements.
- Clip-mounted DIN construction.
High voltage back-up fuses rapidly interrupt damaging short-circuit currents before excessive thermal and mechanical forces can damage transformers, switchgear and associated electrical equipment. Their current-limiting characteristics help reduce equipment stress whilst improving installation reliability.
The Mersen T1000126 combines dependable fault interruption with controlled power dissipation technology, making it particularly suitable for enclosed medium voltage switchgear where minimising internal heating is important for long-term performance.
Typical Applications
- Medium voltage transformer protection.
- Distribution substations.
- Industrial power distribution systems.
- Medium voltage switchgear.
- Renewable energy installations.
- Utility electrical networks.
