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MERSEN FUSE H 2409P BCKUP 442-56/40 E2409PIB-D144/40
Mersen Z209345 Limitor-P DIN high-voltage back-up transformer fuse rated at 24 kV AC and 40 A with a 63 kA breaking capacity and integrated 80 N striker.
£79.87
Why Choose the Mersen Z209345 High-Voltage Transformer Fuse?
The Mersen Z209345, catalogue reference 45DB240V40P, is a high-performance DIN high-voltage back-up fuse-link developed to provide dependable protection for medium-voltage power transformers. As part of the Mersen Limitor®-P series, it is engineered to safely interrupt high short-circuit currents while minimising thermal and mechanical stress on transformers and associated switchgear.
Rated at 24 kV AC and 40 A, the Z209345 delivers a maximum breaking capacity of 63 kA. Its current-limiting characteristics help reduce fault energy, protecting valuable electrical equipment and improving the reliability of industrial and utility power distribution systems.
Manufactured using a ceramic body, pure silver fuse elements and silver-plated copper terminals, the fuse-link complies with IEC 60282-1. An integrated 80 N standard striker provides reliable operation indication and can actuate compatible switchgear tripping mechanisms.
Key Advantages
- DIN high-voltage back-up fuse-link for transformer protection.
- 24 kV AC rated voltage for medium-voltage systems.
- 40 A rated current for transformer applications.
- 63 kA breaking capacity for dependable fault interruption.
- Current-limiting operation reduces thermal and mechanical fault stress.
- Integrated 80 N striker for indication and switchgear tripping.
- Pure silver fuse elements for dependable long-term performance.
- Designed in accordance with IEC 60282-1.
Key Features
- Mersen Limitor®-P back-up fuse series.
- 24 kV AC IEC rated voltage.
- 40 A rated current.
- 63 kA maximum breaking capacity.
- 130 A minimum interrupting current.
- 22 kA²s clearing I²t.
- 114 W power dissipation.
- Standard 80 N striker.
- Silver-plated copper terminals.
- Ceramic insulating body with pure silver fuse elements.
Reliable Protection for Medium-Voltage Transformers
The Mersen Z209345 rapidly interrupts severe short-circuit currents before they can damage transformer windings, switchgear and associated electrical equipment. Its current-limiting performance helps minimise peak fault current and thermal stress, improving the safety and reliability of medium-voltage power systems.
As a back-up fuse-link, the Z209345 should be coordinated with suitable overload protection devices to provide comprehensive transformer protection in industrial, commercial and utility installations.
Typical Applications
- Medium-voltage transformer protection.
- Industrial electrical distribution systems.
- Utility substations.
- Air insulated switchgear.
- Ring main units.
- Infrastructure and renewable energy installations.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 40 A | |
| Voltage | 24000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-P Back-up Fuses | |
| Model | Z209345 | |
| Catalogue number | 45DB240V40P | |
| Product type | High-voltage DIN back-up fuse-link | |
| Application | Transformer protection | |
| Rated voltage | 24 kV AC | |
| Rated current | 40 A | |
| Frequency | 50 / 60 Hz | |
| Maximum breaking capacity | 63 kA | |
| Minimum interrupting current | 130 A | |
| Clearing I²t | 22 kA²s | |
| Cold resistance | 45 mΩ | |
| Power dissipation | 114 W | |
| Fuse size | Ø56 mm × 442 mm | |
| Mounting type | Clip mounting | |
| Design | VDE T4 | |
| Indication system | Standard striker | |
| Striker force | 80 N | |
| Terminal material | Silver-plated copper | |
| Fuse element material | Pure silver | |
| Body material | Ceramic | |
| Product weight | 2.3 kg | |
| EAN / UPC | 3605340218381 | |
| Compliance | IEC 60282-1, RoHS | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen Z209345 used for?
The Mersen Z209345 is a DIN high-voltage back-up fuse-link designed to protect medium-voltage power transformers against high short-circuit currents.
What are the voltage and current ratings?
The fuse is rated at 24 kV AC with a continuous current rating of 40 A.
What is the breaking capacity?
The Z209345 has a maximum breaking capacity of 63 kA, providing dependable interruption of severe fault currents.
Does the fuse include a striker?
Yes. It incorporates a standard 80 N mechanical striker for operation indication and compatible switchgear tripping functions.
Which standards does the Z209345 comply with?
The fuse is manufactured in accordance with IEC 60282-1 and is designed to the VDE T4 format for medium-voltage transformer protection.
Trusted High-Voltage Protection from Mersen
Mersen Limitor®-P high-voltage fuse-links are trusted by utilities, switchgear manufacturers and industrial engineers worldwide for dependable transformer protection, high fault interruption capability and long service life.
