Why Choose the Mersen D209303 High Voltage Transformer Fuse?
The Mersen D209303 is a premium high voltage DIN back-up fuse from the trusted Limitor®-P range, specifically engineered to provide reliable protection for medium voltage transformers. Designed in accordance with IEC 60282-1, it delivers dependable interruption of short-circuit currents for high voltage switchgear and electrical distribution systems.
Manufactured using pure silver fuse elements, silver-plated copper end caps and a robust ceramic body, the D209303 provides excellent electrical performance and long service life. Its integrated 80 N striker enables reliable mechanical indication and operation with compatible medium voltage switchgear mechanisms.
With a rated operating voltage of 7.2 kV AC, a rated current of 100 A and a compact 65 mm × 192 mm DIN format, the D209303 is ideally suited for protecting distribution transformers in substations, industrial facilities, renewable energy systems and utility networks.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- 7.2 kV AC IEC rated voltage.
- 100 A rated current.
- 63 kA breaking capacity.
- Integrated 80 N striker for compatible switchgear mechanisms.
- Pure silver fuse elements provide dependable fault interruption.
- Robust ceramic body offers excellent thermal and mechanical strength.
- Suitable for industrial, utility and OEM medium voltage installations.
Key Features
- Manufacturer: Mersen
- Series: Limitor®-P
- Catalogue number: 45DB72V100P
- SKU: D209303
- Rated voltage: 7.2 kV AC
- Rated current: 100 A
- Breaking capacity: 63 kA
- Fuse dimensions: 65 mm diameter × 192 mm length
- Standard 80 N striker.
- DIN VDE T4 design.
- Clip mounting.
The Mersen Limitor®-P range has been developed specifically to protect medium voltage transformers against the damaging effects of high fault currents. Its current-limiting characteristics help minimise thermal and mechanical stress on transformers and associated switchgear, improving equipment reliability and operational safety.
The D209303 is widely used within substations, industrial power distribution systems, renewable energy installations and OEM medium voltage switchgear where dependable transformer protection is essential.
Typical Applications
- Medium voltage transformer protection.
- Utility substations.
- Industrial power distribution.
- Medium voltage switchgear.
- Renewable energy installations.
- Electrical infrastructure projects.
- OEM switchgear assemblies.
- Commercial power distribution.
