M8 Sensor Connector 3 4 5 Pin Panel Back Mount Waterproof Flange Socket A-Type Male Female

Description

M8 Sensor Connector – 3/4/5 Pin Panel Back Mount Waterproof Flange Socket, A-Type

M8 circular connectors (IEC 61076-2-104) in panel back mount flange socket configuration for compact industrial sensor and automation panel wiring. The M8 thread (8mm diameter) provides a smaller panel footprint than M12 — ideal for high-density sensor connection panels where space is limited. The flange mount design permanently fixes the socket to the panel, creating a standardized IP67-rated connection point for field sensor cables. A-type coding is the standard for general-purpose sensor and actuator connections.

Key Specifications

Standard: IEC 61076-2-104 (M8 circular connector)
Coding: A-type (general sensor/actuator)
Pin Configurations: 3, 4, 5 pin (select above)
IP Rating: IP67 (mated)
Current Rating: 4A per contact (3/4-pin); 2A per contact (5-pin)
Voltage Rating: 30V DC (signal)
Mount: Panel back mount with flange
Panel Hole: 8mm diameter

M8 vs M12 Panel Sockets — When to Use M8

M8 (this product): 8mm thread, 4A per contact, up to 5 pins. For compact panels with high sensor density where M12 sockets would not fit. Use when sensor current is below 4A and the panel space per connection point is limited.
M12: 12mm thread, 4–8A per contact, up to 17 pins. Larger, more robust. The dominant standard for industrial sensor panels. Use for most industrial automation applications unless panel space is severely constrained.
Selection rule: Use M8 only when M12 physically does not fit. M12 provides better mechanical robustness, higher current capacity, and wider accessory availability.

M8 A-Type Pin Assignment

3-pin: Pin 1 = +V supply (brown), Pin 3 = GND (blue), Pin 4 = Signal output (black) — IEC 60947-5-2 standard for 3-wire PNP/NPN sensors
4-pin: Pin 1 = +V, Pin 2 = Output A (white), Pin 3 = GND, Pin 4 = Output B (black)
5-pin: Pin 1 = +V, Pin 2 = Output A, Pin 3 = GND, Pin 4 = Output B, Pin 5 = PE
Always verify against the specific sensor datasheet — some sensors use non-standard pin assignments.

Frequently Asked Questions

What panel cutout is required for M8 flange sockets?

M8 flange sockets require an 8mm diameter panel hole. The flange overlaps the hole and is secured by a nut from the rear (or screws through the flange). Panel thickness: typically 1–4mm. The smaller panel hole compared to M12 (12mm) allows higher connection density on compact panels.

Are M8 and M12 connectors interchangeable?

No. M8 (8mm thread) and M12 (12mm thread) connectors are different sizes and are not interchangeable. M8 cable connectors will not mate with M12 panel sockets, and vice versa. Always verify the connector size before ordering replacement sockets or cable connectors.

Can I use M8 connectors for 24V DC sensor applications?

Yes. The 30V DC rating covers standard 24V DC industrial sensor supply voltages. The 4A per contact rating (3/4-pin) supports most 24V proximity sensor and photoelectric sensor current requirements (typical sensor current: 100–200mA). For actuators drawing more than 4A, use M12 connectors.

Typical Applications

High-density sensor panels: Compact control panels with many sensor connection points
Factory automation: Proximity sensor and photoelectric sensor panel connections
Machine building: Compact actuator and valve connections in space-constrained machines
Robotics: End-of-arm tooling sensor connections where M12 is too large
Food & beverage: Washdown-rated sensor panel connections in compact equipment