Mersen M125F30S 125 A three-pole fusible disconnect switch with right-side operation, designed for compatible FR22 fuse links and industrial circuit isolation.
£425.59
The Mersen M125F30S is a robust 125 A fusible disconnect switch designed to provide dependable load switching, electrical isolation and fuse protection in industrial low-voltage installations. It combines a manually operated switch-disconnector mechanism with compatible fuse links, helping protect downstream equipment against overload and short-circuit conditions.
This model features a three-pole configuration with right-side operation, making it suitable for panel layouts where the operating mechanism must be positioned beside the switching poles. The M125F30S is designed for use with compatible FR22 fuse links, providing a coordinated solution for three-phase circuit protection and isolation.
Manufactured for industrial control panels, machinery and power distribution equipment, the Mersen M125F30S offers reliable switching performance within a compact assembly. Its modular design supports professional panel construction and compatibility with selected Mersen operating handles, shafts and switch accessories.
A fusible disconnect switch combines a load-break switching mechanism with replaceable fuse links. This allows operators to isolate electrical equipment manually while the installed fuses provide protection against excessive current and short-circuit faults.
The Mersen M125F30S is particularly suitable for panel designs requiring a right-side operating mechanism. Its three mechanically linked poles disconnect the phases together, helping create a clearly defined isolation point before inspection, servicing or maintenance work begins.
| Current | 125 A |
|---|---|
| Manufacturer | Mersen |
| Model | M125F30S |
| Product type | Fusible disconnect switch |
| Rated current | 125 A |
| Number of poles | 3 |
| Pole configuration | 3+0 |
| Operating mechanism position | Right side |
| Compatible fuse system | FR22 fuse links |
| Switching function | Load switching and electrical isolation |
| Protection function | Overcurrent protection through installed fuse links |
| Mounting arrangement | Base / panel mounting |
| Operating method | Manual operation with compatible handle |
| Typical application | Three-phase industrial circuit protection and isolation |
| Applicable standard | IEC 60947-3 |
The M125F30S is used for switching, isolating and protecting three-phase electrical circuits in industrial machinery, control panels and power distribution equipment.
The Mersen M125F30S has a rated current of 125 A.
The switch is designed for compatible FR22 fuse links. The fuse rating and utilisation category must be selected to suit the protected circuit and connected equipment.
The 3+0 configuration indicates that the three switching poles are positioned together on one side of the operating mechanism, with the mechanism arranged for right-side operation.
The switch is designed for use with compatible Mersen operating handles and shafts. The required accessories should be selected according to the enclosure and installation arrangement.
Mersen fusible disconnect switches are used by panel builders, OEMs and electrical engineers to provide dependable switching, positive isolation and coordinated fuse protection across industrial electrical systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...
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...