M8 Waterproof Aviation Connector Set 3–8 Pin – Male Female Straight Right Angle Flange

Description

M8 Waterproof Aviation Connector Set – 3–8 Pin Male/Female Plug & Socket (Straight / Right Angle / Flange Mount)

M8 circular connectors (IEC 61076-2-104) are the compact standard for industrial sensor and actuator wiring where the larger M12 footprint is impractical. This set provides matched male plug and female socket pairs in 3 through 8-pin configurations, with three mounting/exit styles: straight cable exit, 90° right-angle cable exit, and panel-mount flange socket — covering the full range of M8 installation scenarios from cable-to-cable connections to panel bulkhead interfaces.

Key Specifications

Thread: M8 × 1.0mm pitch
Pin Configurations: 3, 4, 5, 6, 8 pin (select above)
Mount/Exit Styles: Straight, 90° right angle, panel flange (select above)
IP Rating: IP67 (mated)
Contact Material: Copper alloy, gold-plated
Housing Material: PA66 nylon or zinc alloy (variant dependent)
Current Rating: 3A per pin
Voltage Rating: 250V AC/DC
Operating Temperature: -25°C to +85°C
Panel Cutout (flange mount): 8mm diameter hole
Termination: Solder cup or screw clamp (variant dependent)

M8 Pin Assignment Standards

M8 A-coded connectors follow IEC 60947-5-2 for sensor wiring:

3-pin: Pin 1 = +24V (brown), Pin 3 = 0V GND (blue), Pin 4 = Output (black). Note: 3-pin M8 uses pins 1, 3, 4 — no pin 2.
4-pin: Pin 1 = +24V (brown), Pin 2 = Output 2 / n.c. (white), Pin 3 = 0V GND (blue), Pin 4 = Output 1 (black).
5-pin: Pin 1 = +24V, Pin 2 = Output 2, Pin 3 = 0V GND, Pin 4 = Output 1, Pin 5 = Shield/PE.
8-pin: Device-specific — verify against sensor or actuator datasheet.

Straight vs Right Angle vs Flange — Mount Style Selection

Straight cable exit: Cable exits along the connector axis. Best for open installations with clearance behind the sensor. Lowest profile at the connector body.
90° right angle: Cable exits perpendicular to the connector axis. Essential for sensors mounted close to walls, panels, or adjacent components. Reduces cable bend stress and allows tighter installation spacing.
Panel flange mount: Fixed socket installed in a panel or enclosure wall. Provides a permanent bulkhead interface for field-replaceable cable assemblies. Requires an 8mm panel hole. Used in control panels, junction boxes, and equipment enclosures.

What Questions Does This Product Answer?

"What is the difference between M8 and M12 connectors?" — M8 uses an 8mm thread and 3A per pin rating; M12 uses a 12mm thread and 4A per pin rating. M8 is used for miniature sensors where M12 is physically too large. They are not interchangeable — the threads will not mate.
"Can M8 connectors carry 24V DC power?" — Yes. M8 connectors are rated for 250V AC/DC. For 24V DC sensor supply, the 3A per pin rating is the limiting factor — verify total current draw of the connected device does not exceed 3A per pin.
"How do I assemble a solder-cup M8 connector?" — Use a temperature-controlled iron at 320–350°C. Tin each solder cup first, then insert the pre-tinned wire and apply heat briefly (1–2 seconds). Do not overheat — the M8 housing is small and heat transfers quickly to the plastic insulator. Use heat-shrink over each joint before assembling the backshell.
"What is the minimum bend radius for M8 sensor cables?" — Static installation: 5× cable OD minimum. Dynamic flex (continuous movement): 10× cable OD minimum. M8 cables use 0.25mm² conductors that fatigue faster than larger M12 cables — respect the bend radius to prevent conductor fracture.

Typical Applications

Miniature proximity sensors: Inductive and capacitive sensors with M8 bodies on packaging machines, assembly lines, and conveyor systems
Fiber optic amplifiers: M8 connection to fiber optic sensor heads
Compact photoelectric sensors: Through-beam and diffuse sensors in tight mounting locations
Panel bulkhead interfaces: Flange mount sockets in control panel walls for field-replaceable sensor cables
Robotics: End-of-arm tooling sensor connections, compact I/O interfaces