The M12 4-pin waterproof connector 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 and photoelectric sensor run on automated lines.
What the code letters actually say
| Spec | Value | What it decides |
|---|---|---|
| Type | M12 A-coded, 4 pin | A-code = the general sensor coding; 4 pin covers the standard DC three-wire sensor plus spare |
| Rating | IP67 | Dust-tight, survives immersion short-term – the washdown class |
| Coupling | Screw lock | Vibration-proof connection; no push-pull accidental release |
| Contacts | Gold plated | Low, stable contact resistance for mA-level sensor signals |
| MOQ | 500 pcs | Order male / female, straight / right angle to split the batch |
Selection rules that hold up in practice
- Count the pins the signal needs, then add the spare: a standard DC three-wire sensor uses three – supply, output, ground – and the fourth pin carries the next function or stays as a factory-set spare.
- Right-angle heads for tight panels: the straight body is the default; the right-angle variant saves the cable’s minimum bend radius inside cabinets and on moving carriers.
- Pre-moulded cable or field assembly: pre-moulded wins on IP integrity; field-assemblable wins on spare-parts logistics. Most retrofits standardise on pre-moulded for sensors and keep connectors as the repair stock.
- Most field failures traced to sensors are connector entries: an unsealed thread or an over-torqued gland defeats the IP67 rating of both halves – follow the sensor selection guide guidance and confirm the mating pair before blaming the sensor.
FAQ
Does the 4-pin A-code fit my sensor?
If the sensor is a standard DC three-wire type with an M12 A-coded socket, yes – that is exactly what this connector is built for. Send the sensor datasheet page when you enquire and we confirm before shipping.
Male or female, straight or right angle – how do I split the 500 pcs?
Split freely: the MOQ is on the order total, not per variant. Most users take straight male cords for sensor drops and a smaller batch of female right-angle for panel sides.
How is it priced?
Request a quote – Per piece against quantity and variant split, quoted FOB, CFR or CIF against your destination port.