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MERSEN FUSE H 2409P BCKUP 442-56/1 45DB240V1P
Mersen A1000109 Limitor-P DIN high-voltage transformer back-up fuse rated at 24 kV AC and 1 A, with a 56 x 442 mm ceramic body and integrated 80 N striker.
£57.94
Why Choose the Mersen A1000109 High-Voltage Transformer Fuse?
The Mersen A1000109, catalogue number 45DB240V1P, is a high-performance DIN high-voltage back-up fuse developed for the protection of transformers against damaging short-circuit currents. Part of the established Mersen Limitor®-P series, it is designed for dependable use in high-voltage switchgear, controlgear and electrical distribution systems.
Rated at 24 kV AC and 1 A, the A1000109 provides current-limiting protection for sensitive transformer circuits. Its rapid fault-clearing performance helps reduce the peak current, thermal energy and mechanical stress imposed on transformers and associated high-voltage equipment during a short circuit.
The fuse features a robust ceramic body, pure silver fuse elements and silver-coated copper end caps for reliable electrical performance. Measuring approximately 56 × 442 mm, it also incorporates a standard 80 N medium striker for fuse-operation indication and actuation of compatible switchgear mechanisms.
Key Advantages
- Designed specifically for high-voltage transformer protection.
- 24 kV AC rated voltage for medium-voltage distribution systems.
- 1 A rated current for sensitive transformer circuits.
- High current limitation helps reduce short-circuit energy.
- Fast fault interruption protects transformers and switchgear.
- Integrated 80 N striker for indication and mechanical actuation.
- Suitable for indoor and outdoor high-voltage equipment.
- Robust ceramic construction for dependable service life.
Key Features
- Mersen Limitor®-P high-voltage back-up fuse.
- Manufacturer part number: A1000109.
- Catalogue number: 45DB240V1P.
- Rated voltage: 24 kV AC.
- Rated current: 1 A.
- Fuse diameter: Approximately 56 mm.
- Fuse length: Approximately 442 mm.
- Striker type: Standard medium striker.
- Striker force: 80 N.
- DIN-format fuse-link for compatible high-voltage fusegear.
Reliable Protection for High-Voltage Transformers
The Mersen A1000109 is a back-up fuse designed to interrupt high short-circuit currents in transformer circuits. Its current-limiting action restricts the peak fault current before it reaches its full prospective value, helping protect transformer windings, cables and high-voltage switchgear from severe electrical and mechanical damage.
As a back-up fuse, the A1000109 must be coordinated with suitable switching and protective equipment to cover the complete required current range. Correct fuse selection should consider the transformer rating, system voltage, inrush current and the requirements of the associated switchgear.
Typical Applications
- High-voltage distribution transformer protection.
- Medium-voltage switchgear and controlgear.
- Transformer substations.
- Industrial power distribution systems.
- Utility and infrastructure installations.
- Indoor and outdoor high-voltage equipment.
- Fuse-switch combinations for transformer circuits.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Voltage | 240 V | |
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 1 A | |
| Manufacturer | Mersen | |
| Series | Limitor®-P | |
| Manufacturer part number | A1000109 | |
| Catalogue number | 45DB240V1P | |
| Product type | DIN high-voltage transformer back-up fuse | |
| Rated voltage | 24 kV AC IEC | |
| Rated current | 1 A | |
| Current type | AC | |
| Fuse diameter | Approximately 56 mm | |
| Fuse length | Approximately 442 mm | |
| Striker force | 80 N | |
| Striker travel | Approximately 30 mm | |
| Fuse element material | Pure silver | |
| End-cap material | Silver-coated copper | |
| Body material | Ceramic | |
| Mounting format | DIN cylindrical fuse-link | |
| Application | High-voltage transformer protection | |
| EAN | 3605340452822 | |
| RoHS status | Compliant | |
| Applicable standards | IEC 60282-1, VDE 0670 Part 4 and DIN 43625 | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen A1000109 used for?
The A1000109 is a high-voltage back-up fuse designed to protect transformers and associated switchgear against the effects of short-circuit currents.
What is the rated voltage of the Mersen A1000109?
The fuse has a rated voltage of 24 kV AC in accordance with IEC requirements.
What is the rated current of this fuse?
The Mersen A1000109 has a rated current of 1 A.
What are the dimensions of the A1000109?
The fuse measures approximately 56 mm in diameter and 442 mm in length.
What does the 80 N striker do?
The integrated medium striker provides mechanical indication when the fuse operates and can actuate a compatible switchgear tripping or signalling mechanism.
Is the A1000109 a full-range fuse?
No. It is a back-up fuse intended to interrupt high fault currents. It must be correctly coordinated with suitable protective or switching equipment for complete circuit protection.
Trusted High-Voltage Protection from Mersen
Mersen Limitor®-P high-voltage fuse-links are used by transformer manufacturers, switchgear builders, utilities and industrial engineers to provide dependable short-circuit protection in medium-voltage power systems.
