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MERSEN FUSE Switch.fus 1250A 4-4A 0+3 pos. M1250D03
Mersen M1250D03 1250 A DIN fusible disconnect switch with a three-pole 0+3 configuration, designed for DIN size 4 fuse links and high-current industrial power isolation.
£3,040.93
Why Choose the Mersen M1250D03 DIN Fusible Disconnect Switch?
The Mersen M1250D03 is a heavy-duty DIN fusible disconnect switch designed for dependable switching, isolation and fuse protection in high-current industrial electrical systems. Rated at 1250 A, it combines a manually operated load-break switch with compatible DIN fuse links to provide both circuit isolation and overcurrent protection within one coordinated assembly.
This model features a three-pole 0+3 configuration, with the three switching poles positioned on the right-hand side of the operating mechanism. It is designed to accept DIN size 4 fuse links, making it suitable for substantial three-phase loads in switchboards, industrial distribution systems and large machinery installations.
The M1250D03 offers robust construction, double-break switching contacts and clear manual isolation for demanding applications. When installed with a compatible Mersen operating handle and shaft, the switch can be operated externally from the enclosure door, helping personnel isolate equipment safely before inspection or maintenance.
Key Advantages
- Heavy-duty 1250 A fusible disconnect switch for high-current installations.
- Combines load switching, circuit isolation and fuse protection.
- Accepts compatible DIN size 4 fuse links.
- Three-pole 0+3 configuration for three-phase electrical systems.
- Robust construction suitable for industrial switchboards and machinery.
- Compatible with selected Mersen external handles, shafts and accessories.
Key Features
- Mersen M-series DIN fusible disconnect switch.
- 1250 A rated current.
- Three mechanically linked switching poles.
- Three poles positioned on the right-hand side of the operating mechanism.
- Designed for DIN size 4 fuse links.
- Double-break switching contact design.
- Manual load-break and isolation operation.
- Designed for base mounting inside an electrical enclosure.
High-Current Switching and Fused Circuit Protection
A fusible disconnect switch combines a manually operated isolation device with fuse links selected to protect the connected circuit. This arrangement allows the Mersen M1250D03 to disconnect all three phases together while the installed fuses provide protection against overload and short-circuit conditions according to their characteristics.
Its 1250 A rating and DIN size 4 fuse compatibility make the M1250D03 suitable for major distribution circuits and large industrial loads. A compatible external operating mechanism can provide accessible switching from outside the enclosure while the switch body and fuse links remain protected within the panel.
Typical Applications
- Industrial low-voltage switchboards.
- Main power distribution systems.
- Large machinery and production equipment.
- Motor control centres.
- Industrial process and manufacturing plants.
- OEM power distribution and control panels.
Technical Specifications
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| Current | 1250 A | |
|---|---|---|
| Poles | 3-pole | |
| Device Type | Accessory | |
| Manufacturer | Mersen | |
| Model | M1250D03 | |
| Product type | Fusible disconnect switch | |
| Switch family | Mersen M-series low-voltage switches | |
| Rated current | 1250 A | |
| Number of poles | 3 | |
| Pole configuration | 0+3 | |
| Pole position | Three poles on the right side of the operating mechanism | |
| Fuse system | DIN fuse links | |
| Compatible fuse size | DIN size 4 | |
| Switching function | Load breaking and electrical isolation | |
| Protection function | Overcurrent protection with correctly selected fuse links | |
| Mounting arrangement | Base / panel mounting | |
| Operating method | Manual operation with compatible handle and shaft | |
| Contact design | Double break | |
| Applicable standard | IEC 60947-3 | |
| Barcode | 3605340558326 |
Frequently Asked Questions
What is the Mersen M1250D03 used for?
The M1250D03 is used for high-current load switching, three-phase electrical isolation and fused circuit protection in industrial switchboards, machinery and power distribution systems.
What is the current rating of the M1250D03?
The Mersen M1250D03 has a rated current of 1250 A.
Which fuse links are compatible with the M1250D03?
The switch is designed to accept compatible DIN size 4 fuse links. The fuse rating and utilisation category must be selected to suit the circuit and connected equipment.
What does the 0+3 configuration mean?
The 0+3 configuration indicates that the switch has no poles on one side of the operating mechanism and three switching poles on the right-hand side.
Does the M1250D03 include an external operating handle?
The switch body is designed for use with selected Mersen operating handles and shafts. The required accessories should be chosen separately according to the enclosure and installation arrangement.
Trusted for High-Current Power Distribution
Mersen fusible disconnect switches are used by panel builders, OEMs and electrical engineers to provide reliable switching, positive isolation and coordinated fuse protection across demanding industrial power systems.
