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MERSEN FUSE H 2409UP BCKUP T442-56/40 45DB240V40PT
Mersen P1000145 Limitor-PT high voltage DIN back-up fuse rated at 40 A and 24 kV AC, with controlled power dissipation and an integrated 80 N striker for transformer protection.
£80.81
Why Choose the Mersen P1000145 Limitor®-PT High Voltage Transformer Fuse?
The Mersen P1000145, catalogue number 45DB240V40PT, is a high-performance DIN high voltage back-up fuse designed to protect medium-voltage transformers against damaging short-circuit currents. As part of the proven Mersen Limitor®-PT range, it combines dependable current-limiting protection with controlled power dissipation for use in high-voltage switchgear and electrical distribution systems.
This fuse-link is manufactured using pure silver fuse elements, silver-plated copper terminals and a robust ceramic body. These high-quality materials provide consistent electrical performance, effective fault interruption and dependable service in demanding industrial, utility and infrastructure applications.
Rated at 40 A and 24 kV AC, the Mersen P1000145 offers a high 63 kA breaking capacity. Its 56 mm diameter DIN format, clip-mounted installation and integrated 80 N striker support reliable operation with compatible switchgear trip and indication mechanisms.
Key Advantages
- Designed specifically for medium-voltage transformer protection.
- 24 kV AC voltage rating for high-voltage IEC systems.
- 40 A rated current for compatible transformer applications.
- High 63 kA breaking capacity for dependable fault interruption.
- Controlled power dissipation supports installation within enclosed switchgear.
- Integrated 80 N striker for tripping and fuse operation indication.
Key Features
- Mersen Limitor®-PT back-up fuse series.
- Catalogue number 45DB240V40PT.
- 40 A rated current.
- 24 kV AC IEC rated voltage.
- 63 kA maximum breaking capacity.
- 130 A minimum interrupting rating.
- 22 kA²s clearing I²t at rated voltage.
- Integrated striker-type indication system.
- Silver-plated copper cylindrical terminals.
- Durable ceramic insulating body.
Reliable Protection for Medium Voltage Transformers
Medium-voltage transformers require specialised protection capable of limiting severe short-circuit currents before excessive thermal or mechanical damage occurs. The Mersen P1000145 is a current-limiting back-up fuse designed to interrupt high fault currents rapidly while coordinating with additional protective devices within the electrical installation.
The controlled power dissipation design supports efficient operation in enclosed switchgear, while the integrated striker can activate compatible trip mechanisms or signalling devices after the fuse operates. This helps provide safe fault isolation, clear indication and efficient maintenance within medium-voltage systems.
Typical Applications
- Medium-voltage transformer protection.
- High-voltage switchgear and controlgear.
- Electrical substations.
- Industrial power distribution systems.
- Utility transformer installations.
- OEM medium-voltage electrical equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Voltage | 240 V | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 40 A | |
| Manufacturer | Mersen | |
| Series | Limitor®-PT Back-up Fuses with Controlled Power Dissipation | |
| Item number | P1000145 | |
| Catalogue number | 45DB240V40PT | |
| Product type | High voltage DIN back-up fuse | |
| Application | Transformer protection | |
| Rated voltage | 24 kV AC | |
| Rated current | 40 A | |
| Current type | AC | |
| Fuse size | 56 mm diameter × 442 mm nominal length | |
| Mounting type | Clip mounting | |
| Maximum breaking capacity | 63 kA | |
| Minimum interrupting rating | 130 A | |
| Clearing I²t at rated voltage | 22 kA²s | |
| Power dissipation at rated current | 114 W | |
| Design detail | VDE T4 | |
| Indication system | Yes | |
| Indication type | Striker | |
| Striker force | 80 N | |
| Terminal material | Silver-plated copper | |
| Terminal type | Cylindrical | |
| Body material | Ceramic | |
| Standard | IEC 60282-1 | |
| Product weight | approx. 2.3 kg | |
| EAN | 3605340453188 | |
| RoHS compliant | Yes | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen P1000145 used for?
The Mersen P1000145 is a high-voltage DIN back-up fuse designed to protect medium-voltage transformers against damaging short-circuit currents.
What voltage is the P1000145 rated for?
The fuse has a rated operating voltage of 24 kV AC.
What is the current rating of the Mersen P1000145?
The P1000145 has a rated current of 40 A.
Does the P1000145 include a striker?
Yes. It includes an integrated 80 N striker for operating compatible switchgear trip mechanisms or indication systems.
What is the breaking capacity of this fuse?
The Mersen P1000145 has a maximum AC breaking capacity of 63 kA.
Trusted for High Voltage Transformer Protection
Mersen Limitor®-PT high-voltage fuse-links are used by utilities, switchgear manufacturers and industrial engineers to provide dependable short-circuit protection for transformers and medium-voltage electrical distribution systems.
