M12 Sensor Connector 4 5 8 Pin Panel Back Mount Waterproof Flange Socket A-Code Male Female

Description

M12 Sensor Connector – 4/5/8 Pin Panel Back Mount Waterproof Flange Socket, A-Code

M12 A-code panel back mount flange sockets (IEC 61076-2-101) for industrial sensor, automation, and fieldbus panel wiring. The flange mount design allows the socket to be permanently fixed to a control panel, junction box, or equipment enclosure — creating a standardized, IP67-rated connection point for field device cables. A-code is the most common M12 coding for general-purpose sensor and actuator connections (4-pin and 5-pin) and Ethernet (8-pin). The threaded coupling nut on the mating cable connector provides vibration-resistant locking.

Key Specifications

Standard: IEC 61076-2-101 (M12 circular connector)
Coding: A-code (general sensor/actuator and Ethernet)
Pin Configurations: 4, 5, 8 pin (select above)
IP Rating: IP67 (mated)
Current Rating: 4A per contact (4/5-pin); 0.5A per contact (8-pin Ethernet)
Voltage Rating: 30V DC (signal); 60V AC (power)
Mount: Panel back mount with flange (M12 thread through panel)
Coupling: M12 threaded coupling nut on mating connector

M12 A-Code Pin Assignment Standards

4-pin A-code (standard sensor): Pin 1 = +V supply (brown), Pin 2 = Output A (white), Pin 3 = GND (blue), Pin 4 = Output B (black) — IEC 60947-5-2 standard for 4-wire PNP/NPN sensors
5-pin A-code (standard actuator): Pin 1 = +V supply, Pin 2 = Output A, Pin 3 = GND, Pin 4 = Output B, Pin 5 = PE (protective earth)
8-pin A-code (Ethernet): Standard Ethernet T568B wiring — used for 100BASE-TX and 1000BASE-T industrial Ethernet (PROFINET, EtherNet/IP)

M12 Coding Guide — A vs B vs D vs X

A-code (this product): General sensor/actuator (4/5-pin) and Ethernet (8-pin). The most common M12 coding. Keying prevents mating with B, D, or X coded connectors.
B-code: PROFIBUS fieldbus. 5-pin. Keyed differently from A-code to prevent incorrect mating with sensor connectors.
D-code: 100BASE-TX Ethernet (4-pin). Smaller than A-code 8-pin Ethernet. Used in some PROFINET and EtherNet/IP applications.
X-code: 10GBASE-T Ethernet (8-pin). For high-speed industrial Ethernet applications requiring 10Gbps.

Frequently Asked Questions

What panel cutout size is required for M12 flange sockets?

M12 flange sockets require a 12mm diameter panel hole for the connector body. The flange overlaps the hole and is secured by a nut from the rear (or by screws through the flange, depending on the specific socket design). Panel thickness: typically 1–6mm. For thicker panels, use a socket with a longer threaded body or countersink the panel hole.

What is the difference between front mount and back mount M12 sockets?

Front mount: the socket body is inserted from the front of the panel; the nut tightens from the rear. The connector face is flush with or slightly proud of the panel front. Back mount (this product): the socket body is inserted from the rear of the panel; the flange sits against the rear panel surface. The connector face protrudes through the panel to the front. Back mount provides a cleaner front panel appearance and is preferred for control panels where aesthetics matter.

Can I use A-code 8-pin M12 sockets for PROFINET?

Yes. PROFINET uses standard Ethernet (100BASE-TX or 1000BASE-T) over M12 A-code 8-pin connectors. The wiring follows standard Ethernet T568B color coding. Verify that the cable and connector are rated for the required Ethernet speed — Cat5e cable and connectors for 100BASE-TX; Cat6 or better for 1000BASE-T.

Typical Applications

Factory automation: Sensor and actuator connection points on control panels and junction boxes
Industrial Ethernet: PROFINET, EtherNet/IP panel connection points (8-pin A-code)
Machine building: Standardized sensor connection interfaces on machine panels
Food & beverage: Washdown-rated sensor connection points in food processing equipment panels
Robotics: End-of-arm tooling connection interfaces on robot cell panels