Mersen S085622 Limitor aSJB/D DIN high voltage back-up fuse-link for medium voltage motor protection, rated at 7.2 kV AC and 315 A with a 50 kA breaking capacity and 20 N striker.
£1,342.08
The Mersen S085622 is a high-performance DIN high voltage back-up fuse-link developed to protect medium voltage motors against damaging short-circuit currents. Part of the established Mersen Limitor® aSJB/D series, it is specifically designed to withstand the repeated peak currents generated during motor starting while providing rapid fault interruption when required.
Manufactured for demanding industrial power systems, the S085622 uses silver-plated copper fuse elements, silver-plated brass terminals and a durable melamine fibreglass body. This robust construction supports reliable electrical performance, effective current limitation and a long operational life in high voltage switchgear and motor control applications.
With a rated voltage of 7.2 kV AC and a rated current of 315 A, the Mersen S085622 is suitable for protecting large medium voltage motors. Its DIN-format construction has an 88 mm diameter, a 442 mm fuse length and an integrated 20 N striker for operation with compatible switchgear tripping or indication mechanisms.
Medium voltage motor fuse-links must tolerate the substantial inrush currents produced during motor starting without operating unnecessarily. The Mersen S085622 is designed to support these repeated peak currents while responding rapidly to serious short-circuit faults that could otherwise damage motor windings, cables, contactors and associated switchgear.
As a back-up fuse-link, the S085622 is primarily intended for high-current short-circuit protection and should be coordinated with suitable overload protection. When the fuse operates, its integrated striker can actuate a compatible switchgear trip mechanism or provide an indication that the fuse-link requires replacement.
| Manufacturer | Mersen |
|---|---|
| Series | Limitor® aSJB/D Back-up Fuses |
| Model | S085622 |
| Catalogue number | 45ASD72V315P-3 |
| Product type | DIN high voltage motor protection back-up fuse-link |
| Primary application | Medium voltage motor protection |
| Rated voltage | 7.2 kV AC |
| Rated current | 315 A |
| Maximum AC breaking capacity | 50 kA |
| Minimum breaking current | 1,900 A |
| Total clearing I²t at rated voltage | 2,000 kA²s |
| Heat dissipation at 0.7 × rated current | 60 W |
| Fuse diameter | 88 mm |
| DIN fuse length | 442 mm |
| Overall product length | 508 mm |
| Striker force | 20 N |
| Indication system | Striker |
| Mounting type | Clip mounting |
| Terminal type | Cylindrical |
| Fuse element material | Silver-plated copper |
| Terminal material | Silver-plated brass |
| Body material | Melamine fibreglass |
| Product weight | Approx. 6.1 kg |
| EAN / UPC | 3605340071054 |
| RoHS compliant | Yes |
The Mersen S085622 is a high voltage back-up fuse-link designed to protect medium voltage motors and associated switchgear against damaging short-circuit currents.
The fuse-link has a rated voltage of 7.2 kV AC and a rated current of 315 A.
The Mersen S085622 has a maximum AC breaking capacity of 50 kA.
Yes. It incorporates a 20 N striker for operation with compatible switchgear tripping or indication mechanisms.
The S085622 is a back-up fuse-link intended primarily for high short-circuit current protection. It should be coordinated with suitable overload protection selected for the motor and switchgear installation.
Mersen Limitor® high voltage motor fuse-links are widely specified by switchgear manufacturers, utilities and industrial engineers for dependable short-circuit protection and reliable operation during repeated motor starting cycles.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...