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MERSEN FUSE 729P CPASJD 45/50,8.442 125 729PCPASJD45/50,8.442125
Mersen Z085582 Limitor aSJB/D high-voltage motor protection fuse-link rated at 7.2 kV AC and 125 A with a 20 N striker for medium-voltage motor applications.
£634.60
Why Choose the Mersen Z085582 High-Voltage Motor Protection Fuse?
The Mersen Z085582, catalogue reference 45ASD72V125P-3, is a high-voltage DIN back-up fuse-link specifically developed to protect medium-voltage motors against short-circuit currents while withstanding the repeated inrush currents associated with motor starting. As part of the proven Mersen Limitor® aSJB/D series, it provides dependable protection for industrial motor circuits, switchgear and motor control applications.
Rated at 7.2 kV AC and 125 A, the Z085582 delivers rapid current-limiting protection that interrupts severe fault currents before they reach their maximum prospective peak. This helps reduce thermal, electrical and mechanical stress on motors, cables and associated switchgear while maintaining reliable system performance.
Constructed using pure silver fuse elements, silver-plated brass end caps and a melamine fibreglass body, the fuse measures 50.8 mm in diameter and 442 mm in length. It incorporates an integrated 20 N striker for operating compatible switchgear mechanisms or providing clear fuse indication after operation.
Key Advantages
- Designed specifically for medium-voltage motor protection.
- 7.2 kV AC voltage rating for industrial motor systems.
- 125 A rated current for demanding motor applications.
- Designed to withstand repeated motor starting currents.
- Current-limiting operation reduces fault energy and equipment damage.
- Integrated 20 N striker for switchgear operation or indication.
Key Features
- Mersen Limitor® aSJB/D motor protection fuse-link.
- Catalogue number: 45ASD72V125P-3.
- Rated voltage: 7.2 kV AC.
- Rated current: 125 A.
- Fuse dimensions: 50.8 mm diameter × 442 mm length.
- Power dissipation: 37 W at 0.7 In.
- Operating I²t: 150 kA²s.
- 20 N trip striker.
- Pure silver fuse elements.
- Melamine fibreglass fuse body.
Reliable Protection for Medium-Voltage Motors
The Mersen Z085582 has been engineered specifically for medium-voltage motor circuits where repeated starting currents require a fuse capable of withstanding high peak currents while still providing rapid interruption of damaging short-circuit faults.
Its current-limiting characteristics reduce the energy released during severe faults, helping extend the service life of motors, switchgear and associated electrical equipment while improving overall system reliability.
Typical Applications
- Medium-voltage motor protection.
- Motor control centres.
- Industrial pumps and compressors.
- Mining and processing plants.
- HV switchgear and motor starters.
- Heavy industrial automation systems.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | High voltage | |
| Current | 125 A | |
| Voltage | 7200 V | |
| Manufacturer | Mersen | |
| Series | Limitor® aSJB/D | |
| Model | Z085582 | |
| Catalogue number | 45ASD72V125P-3 | |
| Product type | High-voltage motor back-up fuse-link | |
| Application | Medium-voltage motor protection | |
| Rated voltage | 7.2 kV AC | |
| Rated current | 125 A | |
| Current type | AC | |
| Minimum breaking current | 630 A | |
| Operating I²t | 150 kA²s | |
| Fuse diameter | 50.8 mm | |
| Fuse length | 442 mm | |
| Power dissipation | 37 W @ 0.7 In | |
| Striker force | 20 N | |
| Fuse-element material | Pure silver | |
| End-cap material | Silver-plated brass | |
| Body material | Melamine fibreglass | |
| Coefficient K | 0.51 (IEC 60644) | |
| Mounting type | DIN clip mounting | |
| Product weight | Approx. 2.2 kg | |
| Standards | IEC 60282-1, IEC 60644, DIN 43625 | |
| Compliance | RoHS compliant | |
| EAN | 3605340070538 |
Frequently Asked Questions
What is the Mersen Z085582 used for?
The Mersen Z085582 is a high-voltage back-up fuse-link specifically designed to protect medium-voltage motors against short-circuit faults.
What are the voltage and current ratings?
The fuse is rated at 7.2 kV AC with a 125 A current rating.
Can this fuse withstand repeated motor starts?
Yes. The Limitor® aSJB/D series is specifically designed to withstand repeated motor starting currents while maintaining effective short-circuit protection.
What are the dimensions of the fuse?
The fuse measures approximately 50.8 mm in diameter and 442 mm in length.
Does the fuse include a striker?
Yes. It incorporates an integrated 20 N striker for operating compatible switchgear or providing fuse indication.
Trusted High-Voltage Motor Protection from Mersen
Mersen Limitor® aSJB/D motor protection fuse-links are trusted worldwide to protect medium-voltage motors, switchgear and industrial power systems with dependable current-limiting performance and reliable operation.
