Why Choose the Mersen H209307 High-Voltage Fuse?
The Mersen H209307, catalogue number 45DB120V16P, is a high-voltage DIN back-up fuse-link engineered to provide dependable protection for medium-voltage transformers against damaging short-circuit currents. As part of the proven Mersen Limitor®-P range, it delivers reliable current-limiting performance for high-voltage switchgear, transformer feeders and electrical distribution systems.
Rated at 12 kV AC and 16 A, the H209307 rapidly interrupts high fault currents, helping to minimise thermal and mechanical stress on transformers, cables, busbars and associated switchgear. Manufactured using pure silver fuse elements, silver-coated copper end caps and a ceramic body, it provides dependable long-term protection in demanding industrial and utility installations.
The fuse incorporates a standard 80 N striker for operation of compatible switchgear mechanisms or remote indication. Its DIN dimensions of approximately 56 mm diameter and 292 mm length make it suitable for compatible medium-voltage fuse holders.
Key Advantages
- Purpose-designed high-voltage back-up fuse for transformer protection.
- 12 kV AC rated voltage for medium-voltage distribution systems.
- 16 A rated current.
- 63 kA breaking capacity for dependable fault interruption.
- Current-limiting operation helps reduce equipment damage.
- Integrated 80 N striker for switchgear tripping or indication.
- Manufactured using premium ceramic, silver and copper materials.
- Designed to IEC 60282-1 requirements.
Key Features
- Mersen Limitor®-P back-up fuse series.
- DIN high-voltage transformer fuse-link.
- 12 kV AC IEC rated voltage.
- 16 A rated current.
- 63 kA maximum breaking capacity.
- 54 A minimum breaking current.
- 2 kA²s clearing I²t.
- 38 W power dissipation.
- 56 mm fuse diameter.
- 292 mm fuse length.
- 80 N standard striker.
- Pure silver fuse elements with ceramic insulating body.
The Mersen H209307 is a current-limiting back-up fuse specifically designed to protect medium-voltage transformers against high short-circuit currents. Its rapid interruption characteristics help reduce the energy released into the protected installation, improving equipment protection and reducing downtime.
Its integrated striker enables compatible switching devices to disconnect the circuit automatically following fuse operation, improving operational safety and simplifying maintenance procedures.
Typical Applications
- Medium-voltage transformer protection.
- High-voltage switchgear.
- Transformer feeder panels.
- Fuse-switch combination units.
- Industrial electrical distribution systems.
- Utility substations.
- Commercial infrastructure power networks.
