Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE H 1209P GEN PURPOSE 292-78/40 45DG120V40P
Mersen A1000155 Limitor-G DIN high-voltage general purpose fuse rated at 12 kV AC and 40 A with 40 kA breaking capacity and integrated 80 N striker.
£164.09
Why Choose the Mersen A1000155 High-Voltage General Purpose Fuse?
The Mersen A1000155, catalogue number 45DG120V40P, is a premium DIN high-voltage general purpose fuse-link developed for reliable transformer protection in medium-voltage electrical systems. As part of the trusted Mersen Limitor®-G series, it provides dependable protection against both low overcurrents and high short-circuit currents in accordance with IEC 60282-1.
Designed using pure silver fuse elements, silver-plated copper terminals and a durable ceramic body, the A1000155 delivers outstanding electrical performance and long operational life. An integrated 80 N striker provides positive fuse operation indication and can actuate compatible switchgear trip mechanisms for enhanced system safety.
With a 12 kV AC IEC voltage rating, 40 A current rating and a 40 kA breaking capacity, this fuse is ideally suited to protecting distribution transformers, switchgear and medium-voltage power systems where dependable fault protection is essential.
Key Advantages
- Designed for medium-voltage transformer protection.
- 12 kV AC IEC rated voltage.
- 40 A rated current.
- 40 kA breaking capacity.
- General purpose protection against low overcurrents and short circuits.
- Integrated 80 N striker for fuse indication and switchgear operation.
- High-quality ceramic construction with silver-plated terminals.
Key Features
- Mersen Limitor®-G general purpose fuse-link.
- Manufacturer part number: A1000155.
- Catalogue number: 45DG120V40P.
- Rated voltage: 12 kV AC.
- Rated current: 40 A.
- Breaking capacity: 40 kA.
- Fuse dimensions: 78 × 292 mm.
- Integrated striker: 80 N.
- Clip mounting with cylindrical terminals.
- General purpose transformer protection in accordance with IEC 60282-1.
Reliable Protection for Medium-Voltage Transformers
The Mersen A1000155 provides general purpose protection for distribution transformers by interrupting both low overcurrents and severe short-circuit faults before they can damage valuable electrical equipment. Its current-limiting design helps reduce thermal and mechanical stresses throughout the protected installation.
The integrated striker mechanism provides positive mechanical indication following fuse operation and can actuate compatible switchgear tripping devices, helping maintenance engineers quickly identify faults and minimise downtime.
Typical Applications
- Medium-voltage distribution transformers.
- High-voltage switchgear.
- Transformer substations.
- Industrial electrical distribution.
- Utility infrastructure.
- Indoor and outdoor medium-voltage installations.
- Fuse-switch combinations.
Technical Specifications
Tick the specs you need, then view products that match.
| Voltage | 120 V | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 40 A | |
| Manufacturer | Mersen | |
| Series | Limitor®-G | |
| Manufacturer part number | A1000155 | |
| Catalogue number | 45DG120V40P | |
| Product type | DIN high-voltage general purpose fuse | |
| Rated voltage | 12 kV AC IEC | |
| Rated current | 40 A | |
| Breaking capacity | 40 kA | |
| Clearing I²t | 110 kA²s | |
| Power dissipation | 24 W at rated current | |
| Fuse diameter | 78 mm | |
| Nominal fuse length | 292 mm | |
| Mounting type | Clip mounting | |
| Terminal type | Cylindrical | |
| Terminal material | Silver-plated copper | |
| Body material | Ceramic | |
| Striker force | 80 N | |
| Approximate weight | 3.1 kg | |
| EAN | 3605340453287 | |
| Compliance | IEC 60282-1, RoHS compliant | |
| HS Code | 85351000 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen A1000155 used for?
The A1000155 is a general purpose high-voltage fuse designed primarily to protect distribution transformers against low overcurrents and short-circuit faults.
What is the voltage rating?
This fuse has a rated voltage of 12 kV AC.
What is the current rating?
The Mersen A1000155 has a 40 A rated current.
What is the breaking capacity?
The fuse provides a maximum AC breaking capacity of 40 kA.
What does the integrated striker do?
The built-in 80 N striker provides mechanical indication when the fuse operates and can actuate compatible switchgear tripping mechanisms.
Trusted High-Voltage Protection from Mersen
Mersen Limitor®-G high-voltage fuse-links are trusted worldwide by utilities, transformer manufacturers and industrial engineers for dependable protection of medium-voltage transformers and switchgear.
