Mersen M315E03 315 A three-pole IEC non-fused load break switch with a 0+3 configuration for industrial power distribution, machinery and electrical circuit isolation.
£398.77
The Mersen M315E03 is a heavy-duty 315 A three-pole IEC non-fused load break switch designed for reliable switching and electrical isolation in industrial low-voltage power distribution systems. It provides dependable load-making and load-breaking performance for substantial three-phase circuits used within switchboards, machinery and electrical distribution assemblies.
Featuring a 0+3 pole configuration, the M315E03 switches all three phase conductors simultaneously while providing no additional switched neutral pole. Its robust base-mounted construction makes it suitable for panel builders and OEM manufacturers requiring a compact yet durable isolation solution for demanding industrial environments.
With a rated operational current of 315 A, the Mersen M315E03 is suitable for incoming supplies, outgoing feeders, motor control centres and production equipment. As a non-fused switch, it allows suitable fuses or circuit breakers to be selected separately according to the fault level, cable size and protection requirements of the installation.
Load break switches provide a controlled means of connecting, disconnecting and isolating electrical circuits under normal operating conditions. The Mersen M315E03 switches all three phases together, creating a clearly defined isolation point before inspection, servicing or maintenance work begins.
Because the M315E03 does not contain fuse links, appropriate upstream or downstream overcurrent and short-circuit protection must be provided separately. This allows engineers to select protective devices that match the prospective fault current, conductor size and load characteristics of the installation.
| Current | 315 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Model | M315E03 |
| Product type | IEC non-fused load break switch |
| Rated operational current | 315 A |
| Rated operating voltage | Up to 1,000 V AC, subject to application ratings |
| Frequency | 50 / 60 Hz |
| Number of poles | 3 |
| Pole configuration | 0+3 |
| Fuse protection | Non-fused |
| Mounting type | Base mounted |
| Operation | Front operated with compatible handle and shaft |
| Switching function | Load making, load breaking and circuit isolation |
| Applicable standard | IEC 60947-3 |
The M315E03 is used to switch and isolate three-phase electrical circuits in industrial switchboards, machinery and low-voltage power distribution systems.
The Mersen M315E03 has a rated operational current of 315 A.
The 0+3 configuration means the switch has three switched phase poles and no additional switched neutral pole.
No. The M315E03 is a non-fused load break switch, so suitable fuse or circuit-breaker protection must be provided separately.
The switch is normally base mounted inside an industrial switchboard or electrical enclosure and operated using compatible Mersen handle and shaft accessories.
Mersen IEC load break switches are widely specified by panel builders, OEM manufacturers and industrial electrical engineers for dependable switching, safe circuit isolation and reliable performance in demanding power distribution applications.
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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...
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...