| Brand | LS ELECTRIC |
|---|---|
| Series | Metasol MC |
| Product Type | Magnetic Contactor (AC coil) |
| Model | MC-18b |
| Part No | MC-18b AC220V |
| Frame Size | 22 AF |
| Number of Poles | 3P |
| Main Contacts | 3 NO |
| Auxiliary Contacts | 1 NO + 1 NC (1a1b) |
| Rated Operational Current AC-3 (200/240 V, 380/440 V) | 18 A |
| Rated Operational Current AC-3 (500/550 V / 690 V) | 13 A / 9 A |
| Motor Rating AC-3 @ 200/240 V | 4.5 kW |
| Motor Rating AC-3 @ 380/440 V | 7.5 kW |
| Motor Rating AC-3 @ 500/550 V and 690 V | 7.5 kW |
| Thermal Current AC-1 (Ith) | 32 A |
| Rated Operational Voltage (Ue) | 690 V AC |
| Rated Insulation Voltage (Ui) | 690 V |
| Rated Impulse Withstand Voltage (Uimp) | 6 kV |
| Coil Voltage | 220 V AC, 50/60 Hz |
| Mechanical Durability | 15 million operations |
| Electrical Durability | 2.5 million operations |
| Max. Operating Rate (AC-3) | 1,800 operations/hour |
| Connection | Screw terminals |
| Mounting | 35 mm DIN rail or screw mounting |
| Dimensions (W x H) | 45 x 73.5 mm |
| Weight | Approx. 0.34 kg |
| Degree of Protection | IP20 |
| Standards | IEC/EN 60947-1, IEC/EN 60947-4-1, UL 508 |
| Matching Overload Relay | MT-32 (direct mounting) |
Product Overview
The LS ELECTRIC Metasol MC-18b is a 3-pole magnetic contactor from the compact 22 AF frame, rated 18 A in AC-3 duty for switching three-phase motors up to 7.5 kW at 380/440 V (4.5 kW at 200/240 V). This version has a 220 V AC, 50/60 Hz coil and includes a built-in 1 NO + 1 NC auxiliary contact for interlocking and signalling, with an AC-1 thermal current of 32 A for resistive loads.
Built to IEC/EN 60947-4-1 and UL 508, the MC-18b offers 15 million mechanical and 2.5 million electrical operations, a 690 V rated insulation voltage and 6 kV impulse withstand. It mounts on a 35 mm DIN rail or by screws, has IP20 finger-safe screw terminals and accepts the MT-32 thermal overload relay directly, making it a convenient building block for DOL starters, star-delta starters and general control panels.
Key Features
- 18 A AC-3 rating, 7.5 kW at 380/440 V
- AC-1 thermal current 32 A
- 220 V AC 50/60 Hz operating coil
- Built-in 1 NO + 1 NC auxiliary contact
- 15 million mechanical / 2.5 million electrical operations
- Compact 45 mm wide body, DIN rail or screw mounting
- Direct mounting of MT-32 thermal overload relay
- Complies with IEC/EN 60947-4-1 and UL 508
Applications
- Direct-on-line (DOL) motor starters
- Star-delta starter panels
- Pump and fan motor control
- Compressor and conveyor control
- HVAC and AHU control panels
- Heating and resistive load switching
- Lighting control panels
- Machine tool and industrial automation panels
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