| Parameter | MC-18a /4 |
| Model / Series | MC-18a/4 (Metasol series) |
| Main contacts | 4 × NO (4P) |
| Auxiliary contacts | Variant: 1 NO + 1 NC |
| Rated current (AC-3) | ≈18 A |
| Coil/control voltage | AC and DC coil variants available |
| Rated operational voltage (Ue) | Up to 690 V |
| Rated insulation voltage (Ui) | ~690–1000 V |
| Dimensions (W×H×D) | Slightly deeper/taller than 3P version; verify PN |
| Mounting | DIN-rail or screw |
| Standards / Certifications | IEC 60947-4-1, UL-508 |
4-pole magnetic contactor based on the MC-18a frame: 18 A rating per pole, useful where neutral or an extra pole must be switched (same accessory/coil options as MC-18a).
The Polar Energy Assessment:
Same small footprint and long electrical life as MC-18a, but with an added pole for neutral switching or multi-circuit control. Ideal for compact panels that must isolate neutral or handle specific wiring rules. Keep an eye on slightly increased depth/weight vs 3-pole variants.
Product images are for illustrative purposes only and may not exactly match the actual item. All specifications and technical details should be verified using the official catalogs and datasheets provided by the respective manufacturer, as discrepancies may exist on this website.
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