Why Choose the Mersen W1000243 Limitor®-PD High Voltage Back-up Fuse?
The Mersen W1000243 is a premium Limitor®-PD high voltage DIN back-up fuse-link engineered for dependable transformer protection in medium voltage electrical distribution systems. Designed in accordance with IEC 60282-1 and VDE 0670 T402, it provides fast, reliable interruption of high fault currents, helping protect transformers and switchgear from costly damage.
As part of the trusted Mersen Limitor®-PD range, this fuse incorporates high purity silver fuse elements, silver-plated copper terminals and a robust ceramic body for exceptional electrical performance and long service life. The integrated 80 N striker provides reliable indication and operation of compatible switchgear mechanisms.
With a rated voltage of 12 kV AC, a 25 A current rating and a compact 56 mm × 292 mm DIN format, the W1000243 is ideally suited for transformer primary protection within industrial substations, utility networks and medium voltage switchgear.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- Manufactured to IEC 60282-1 and VDE 0670 T402.
- 12 kV AC voltage rating for industrial distribution systems.
- 25 A rated current for transformer primary protection.
- Integrated 80 N striker for dependable switchgear indication.
- Premium ceramic construction with silver fuse elements for long operating life.
Key Features
- Mersen Limitor®-PD back-up fuse-link.
- Catalogue number: 45DB120V25PD.
- Rated voltage: 12 kV AC.
- Rated current: 25 A.
- Breaking capacity: 63 kA.
- Fuse dimensions: 56 mm diameter × 292 mm body.
- Integrated 80 N striker mechanism.
- Suitable for DIN medium voltage switchgear and transformer protection.
High voltage back-up fuse-links protect transformers by rapidly clearing high fault currents before they can damage critical electrical equipment. This improves system reliability, enhances operational safety and helps minimise costly downtime across industrial power distribution systems.
The Mersen Limitor®-PD range has been trusted worldwide for decades in substations, transformer installations and medium voltage switchgear, delivering consistent protection and dependable long-term performance.
Typical Applications
- Medium voltage transformer protection.
- Industrial substations.
- Medium voltage switchgear.
- Utility power distribution systems.
- Electrical infrastructure projects.
- Industrial manufacturing facilities.
