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MERSEN FUSE H 1209UP BCKUP T292-56/25 T1000126
Mersen T1000126 Limitor-PT high voltage DIN back-up fuse rated at 12 kV AC and 25 A with controlled power dissipation and an 80 N striker for transformer protection.
£68.45
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.
Reliable Protection for Medium Voltage Transformers
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.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | High voltage | |
| Current | 25 A | |
| Voltage | 12000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-PT Back-up Fuses with Controlled Power Dissipation | |
| Model | T1000126 | |
| Catalogue number | 45DB120V25PT | |
| EAN | 3605340452990 | |
| Product type | High voltage DIN back-up fuse | |
| Primary application | Transformer protection | |
| Rated voltage | 12 kV AC | |
| Rated current | 25 A | |
| Current type | AC | |
| Fuse size | 56 mm diameter × 292 mm | |
| Maximum AC breaking capacity | 63 kA | |
| Minimum breaking current | 93 A | |
| Clearing I²t | 5.5 kA²s | |
| Cold resistance | 52 mΩ | |
| Power dissipation | 46 W | |
| Mounting type | Clip mounting | |
| Striker | Controlled power dissipation, 80 N | |
| Body material | Ceramic | |
| Fuse element | Pure silver | |
| Terminal material | Silver-plated copper | |
| Weight | Approx. 1.6 kg | |
| Standards | IEC 60282-1 | |
| RoHS compliant | Yes | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen T1000126 used for?
The T1000126 is a high voltage DIN back-up fuse designed to protect medium voltage transformers against damaging short-circuit currents.
What voltage is the T1000126 rated for?
This fuse has a rated operating voltage of 12 kV AC.
What is the current rating of this fuse?
The Mersen T1000126 has a rated current of 25 A.
Does this fuse include a striker?
Yes. It incorporates an integrated 80 N controlled power dissipation striker for coordinated operation with compatible medium voltage switchgear.
What is the breaking capacity of the T1000126?
The fuse provides a maximum AC breaking capacity of 63 kA for dependable interruption of high fault currents.
Trusted for Medium Voltage Transformer Protection
Mersen Limitor®-PT high voltage fuse-links are trusted by utilities, switchgear manufacturers and industrial engineers for dependable transformer protection, controlled power dissipation and reliable operation in medium voltage electrical distribution systems.
