The M8 circular connector is a compact industrial sensor connector standardized under IEC 61076-2-104. With an 8mm locking thread and a compact cylindrical form factor, the M8 is the go-to interface for proximity sensors, photoelectric sensors, and compact I/O modules in factory automation. Available in 3, 4, 5, 6, and 8-pin configurations, the M8 connector uses a threaded coupling ring that provides IP67 environmental sealing and vibration-resistant mating. The 4-pin version is by far the most common, providing power and signal connections for standard industrial sensors. M8 connectors are manufactured by dozens of companies including Phoenix Contact, Binder, Murrelektronik, and TE Connectivity, and are interchangeable across manufacturers due to the IEC standardization. Their compact size makes them essential for space-constrained sensor installations on automated machinery.
Specifications
Pin Count
4
Wire Gauge Range
26–22 AWG
Voltage Rating
30 VDC
Current Rating
4A continuous
IP Rating
IP67
Mating Cycles
100
Operating Temp
-25°C to +85°C
Key Features
IEC 61076-2-104 standardized for cross-manufacturer compatibility
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