{"id":1852,"date":"2026-10-29T07:56:29","date_gmt":"2026-10-29T07:56:29","guid":{"rendered":"https:\/\/kaivoy.com\/guides\/m12-connector-selection-guide\/"},"modified":"2026-10-29T07:56:29","modified_gmt":"2026-10-29T07:56:29","slug":"m12-connector-selection-guide","status":"publish","type":"page","link":"https:\/\/kaivoy.com\/es\/guides\/m12-connector-selection-guide\/","title":{"rendered":"M12 Connector Selection Guide: A-Code, IP67 and Wiring"},"content":{"rendered":"

The M12 4-pin waterproof connector<\/a> is the connection standard for sensors, actuators and field wiring where the joint has to survive washdown and weather. Screw coupling, moulded body, IP67 – it is the fitting at both ends of almost every proximity sensor<\/a> and photoelectric sensor run on automated lines.<\/p>\n\n\n\n

What the code letters actually say<\/h2>\n\n\n\n
Spec<\/th>Value<\/th>What it decides<\/th><\/tr><\/thead>
Type<\/td>M12 A-coded, 4 pin<\/td>A-code = the general sensor coding; 4 pin covers the standard DC three-wire sensor plus spare<\/td><\/tr>
Rating<\/td>IP67<\/td>Dust-tight, survives immersion short-term – the washdown class<\/td><\/tr>
Coupling<\/td>Screw lock<\/td>Vibration-proof connection; no push-pull accidental release<\/td><\/tr>
Contacts<\/td>Gold plated<\/td>Low, stable contact resistance for mA-level sensor signals<\/td><\/tr>
MOQ<\/td>500 pcs<\/td>Order male \/ female, straight \/ right angle to split the batch<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Selection rules that hold up in practice<\/h2>\n\n\n\n