M12 4-Pin Connector
From Standard Connections to Custom Cable Assemblies
A-coded, B-coded and D-coded M12 4-pin connectors for sensors, automation equipment, industrial Ethernet and custom machine wiring. Cable assemblies, panel receptacles, PCB connectors and field-wireable options manufactured in Dongguan.
M12 4-Pin Product Structures
Cable assemblies, cable-end connectors, panel receptacles and PCB structures are shown here. Choose the closest type and we confirm the remaining details.
Produced and Checked in Our Dongguan Factory
The page below shows our connector assembly, cable processing, electrical testing and waterproof inspection capabilities.
View Factory & TestingCoding is selected according to the signal, fieldbus or industrial Ethernet application.
Choose the Structure That Matches Your Equipment
Browse the main M12 4-pin structures we manufacture. Open any card to see where it is used, available configurations and when that structure is usually selected.
Overmolded Cable Assembly
Ready-to-install single-ended or double-ended 4-pin cables for sensors, actuators and industrial equipment.
Typical Applications
Sensors, actuators, I/O boxes and factory automation equipment.
Available Options
Male / female · straight / angled · A/B/D-coded · PVC/PUR · single- or double-ended.
Best For
Ready-to-install machine wiring where field termination is not required.
Field-Wireable Connector
Screw or spring termination options for maintenance, equipment wiring and on-site installation.
Typical Applications
Machine maintenance, on-site installation and field replacement.
Available Options
Screw / spring · metal / plastic · straight / angled · multiple cable-entry sizes.
Best For
Installations that need termination or service directly on site.
Solder or Crimp Cable Connector
Cable-end plugs and sockets for projects that require soldered or crimped contact termination.
Typical Applications
Custom cable builds, equipment leads and compact cable-side interfaces.
Available Options
Solder / crimp · male / female · metal / plastic · shielded options by model.
Best For
Projects that require cable-side assembly without full overmolding.
Panel-Mount Receptacle
Front- or rear-mount male and female receptacles for control cabinets, junction boxes and equipment housings.
Typical Applications
Control cabinets, junction boxes, controllers and machine housings.
Available Options
Front / rear mount · male / female · solder / PCB / wire lead depending on structure.
Best For
Creating a fixed M12 interface on the equipment side.
PCB-Mount Connector
Board-level straight or right-angle connector structures for controllers, sensor modules and compact equipment.
Typical Applications
Controllers, sensor modules, I/O devices and compact electronic equipment.
Available Options
Straight / angled · PCB / solder · different mounting threads and footprints by model.
Best For
Board-level integration where space and footprint must be controlled.
Male-to-Female Extension Cable
Extension cable assemblies with confirmed pin-to-pin wiring for sensors, I/O boxes and machine interfaces.
Typical Applications
Sensors, actuators, I/O boxes and machine-interface extensions.
Available Options
Custom length · straight / angled ends · PVC/PUR · shielded options by application.
Best For
Extending an existing M12 connection without changing the equipment interface.
Open-Wire Cable or Custom Harness
M12 cable with stripped wires, ferrules, terminals or another connector according to your wiring requirement.
Typical Applications
Control cabinets, machine wiring, sensor leads and custom harness integration.
Available Options
Open wire · ferrules · terminals · second connector · custom wire colors and pin mapping.
Best For
Projects that need M12 on one side and a customized termination on the other.
D-Coded Industrial Ethernet Cable
Shielded 4-pin D-coded cable and receptacle options for industrial Ethernet connections.
Typical Applications
Industrial Ethernet, machine vision, controllers and networked automation equipment.
Available Options
D-coded · shielded cable · cable / panel interface · custom length and second end.
Best For
4-pin industrial Ethernet links that require a rugged M12 interface.
Key Configuration Options at a Glance
Coding
A / B / D
Interface
Male / Female
Termination
Cable / Solder / PCB / Screw
Wiring
Standard / Custom Pinout
Installation
Cable / Panel / PCB
Cable
PVC / PUR / Shielded
M12 4-Pin Projects Across Industrial Applications
Four customer projects showing how M12 4-pin connector and cable configurations were applied in automation, machine vision, outdoor equipment and robotics.
Customer Project
Germany Automation Sensor Project
M12 A-Coded 4-Pin Overmolded Cable Assembly
Project
Automated production line sensor connection
Requirement
A compact field connection was required between photoelectric sensors and the control system. The customer needed quick sensor replacement while keeping machine-side wiring simple.
Solution
Straight female M12 A-coded 4-pin connector with PUR cable and open-wire tail. Cable length, wire colors and pin assignment were matched to the equipment wiring layout.
Customer Project
Netherlands Machine Vision Project
M12 D-Coded 4-Pin Shielded Ethernet Cable
Project
Industrial camera and controller connection
Requirement
The machine-vision system required stable Ethernet communication in a production environment with electrical interference and limited cable-routing space.
Solution
A shielded D-coded M12 cable assembly was selected, with cable length, connector orientation and shielding structure matched to the machine layout.
Customer Project
Spain Outdoor Industrial Equipment Project
M12 4-Pin Waterproof Cable + Panel Receptacle
Project
Outdoor sensor and control connection
Requirement
The connection point was exposed to moisture, dust, temperature changes and equipment vibration.
Solution
A molded M12 cable assembly with matching panel receptacle was selected for the equipment interface, with waterproof performance verified under the applicable test condition.
Customer Project
South Korea Robotics & AGV Project
M12 A-Coded 4-Pin PUR Cable Assembly
Project
Moving sensor connection for robotic equipment
Requirement
The cable was exposed to repeated movement, vibration and tight routing around moving equipment.
Solution
PUR cable with an angled M12 connector structure was used to improve routing and reduce mechanical stress at the cable entry.
IP67 Waterproof Test Reports for M8 & M12 Connectors
Waterproof performance should be verified on the actual connector structure and mating condition. The four report images below document IP67 waterproof verification for NITAI M8 and M12 connector products and can be opened at full size.
From Requirement to Production in Three Steps
Review Requirement
Photo, drawing, existing sample or product specification.
Confirm Drawing / Sample
Interface, dimensions, wiring, cable and material direction.
Production & Testing
Manufacturing, inspection, applicable testing and shipment.
See How the Connector Is Made and Checked
NITAI was founded in 2012 in Dongguan. Our team manufactures industrial connectors and terminal blocks, with connector assembly, cable processing, molding and testing handled through our production workflow.
Cable and Contact Work
Cable preparation, contact termination and pin-to-wire checks are handled according to the confirmed configuration.
Connector Assembly
Shell, insert, sealing and connection components are assembled for the selected product structure.
Electrical Checks
Continuity, insulation and contact checks are applied according to the product and project requirements.
Waterproof Verification
Ingress-protection testing is performed for applicable models and properly mated configurations.
Waterproof Evidence
IP67 Test Records Available
M8 and M12 IP67 waterproof test report images are shown above as direct test evidence for applicable connector configurations.
View IP67 Test Reports →Production Details We Control
Common Questions About M12 4-Pin Projects
Can you identify an M12 4-pin connector from a photo?
Are all M12 4-pin connectors wired the same way?
Can you make both standard products and custom cable assemblies?
Can you match an old cable or installed machine connection?
Is every M12 4-pin connector IP67 or IP68?
Do I need a complete drawing before asking for a quote?
Can cable length, material, shielding and pinout be customized?
Send Your M12 4-Pin Requirement for Review
You do not need to complete every technical field before contacting us. Send the information already available and we will identify what still needs confirmation.
Request a Specification Review
Required fields are kept short. Upload one product photo, drawing or PDF directly with your inquiry.