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M8 Circular Connector

M8 Circular Connectors

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M8 Circular Connector

Engineered for mission-critical industrial environments, CONNODER M8 circular connectors deliver uncompromising signal integrity, mechanical robustness, and long-term reliability in the most demanding automation applications. Built to IEC 61076-2-104 standards, each connector features precision-machined brass housings, gold-plated contacts (≥0.5 µm), and integrated strain relief—ensuring stable electrical performance across millions of mating cycles.
Designed as direct functional equivalents, CONNODER M8 connectors seamlessly integrate with systems using components from SICK, TURCK, Omron, Keyence, IFM, Balluff, Pepperl+Fuchs, and Di-soric—enabling drop-in replacement without re-engineering. Ideal for compact sensor networks, robotic end-effectors, mobile machinery, and modular I/O architectures where space, reliability, and interoperability are non-negotiable.
Note: CONNODER is a professional manufacturer specializing in the research and development and production of industrial circular connectors and cables, connectors, cables and peripheral equipment components. All brand names mentioned in this article are trademarks of their respective owners and are used only to indicate product compatibility.

M8 Circular Connector

Engineered for industrial automation and sensor networks, the CONNODER M8 circular connector delivers robust signal integrity, environmental resilience, and plug-and-play compatibility in a compact 8 mm form factor.

  • Standardized M8 Thread (M8×1): Ensures universal mechanical compatibility across global automation platforms and sensor ecosystems.
  • Triple Termination Options: Choose from screw-clamp (field-wireable), solder (permanent cable assembly), or PCB mount (board-in) for maximum design flexibility.
  • IP67/IP68 Protection: Fully sealed against dust, water immersion, and high-pressure washdown—ideal for food processing, outdoor robotics, and mobile machinery.
  • A-, B-, and D-Coded Variants: Supports digital/analog sensors (A), fieldbus (B), and Industrial Ethernet (D)—enabling unified cabling for mixed-signal architectures.
  • Gold-Plated Contacts (≥0.5 µm): Ensures low contact resistance, corrosion resistance, and stable performance over millions of mating cycles.
  • Drop-in Compatibility: Fully interchangeable with M8 connectors from SICK, TURCK, Omron, Keyence, IFM, Balluff, Pepperl+Fuchs, Di-soric, and other leading brands—no system redesign required.
  • IEC 61076-2-104 Certified: Manufactured to international standards for electrical performance, mechanical strength, and environmental endurance.

Designed for continuous operation in high-vibration and temperature-extreme environments, the CONNODER M8 connector maintains stable electrical contact and mechanical integrity—ensuring uninterrupted data and power transmission in mission-critical systems.

Typical Applications
Factory automation sensors & actuators, robotic end-effectors, distributed I/O modules, packaging machinery, agricultural equipment, and Industrial Ethernet nodes in PROFINET, EtherNet/IP, and Modbus TCP networks.

As a global manufacturer, CONNODER provides standard and custom M8 circular connectors—including pre-assembled cable solutions—Connoder is committed to driving the advancement of industrial automation through innovative, reliable and efficient circular connector solutions.

M8 Circular Connector Types

Explore our M8 circular connector range today to discover the best connectivity solution for your project! If you need more technical details or customization advice on the M8 circular connector, please feel free to contact us for more information and support.

M8 Circular Connector Panel Mount

Suitable for perforated installation on the equipment housing or panel, providing a stable external interface.
Installation methods: Front - panel mounting, Rear - panel mounting.
Connection methods: Wire - welding, PCB - plugging.
Protection level: IP67

M8 Circular Connector Assembled

A flexible connection solution designed for industrial automation, especially suitable for scenarios that require on - site assembly or customized wiring.
Material types: Plastic assembly, Metal assembly
Connection methods: Screw - terminal connection, Welding connection
Protection level: IP67

M8 Pre-Molded Cable Assemblies

The precision injection - molding of the connector and cable is completed before leaving the factory, ensuring consistency and high reliability.
Cable types: PVC, PUR.
Length customization: Custom lengths as specified by customers are supported, reducing on - site wiring and connection work.
Protection level: IP67

M8 Circular Connector

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M8 Circular Connector

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Connoder European - standard M - series Circular Connectors --- M8 Series

Applications of Circular Connectors

The compact size of the M8 connector makes it particularly suitable for space-constrained applications like factory automation machinery. In industrial automation, M8 connectors are commonly used to connect sensors, switches, actuators, PLCs, I/O boxes, and other components in industrial machinery, such as food and beverage processing, machine building, rubber and plastics, textile and printing presses, and in HVAC system valves. M8 connectors are found in RFID readers used in rail and industrial markets. In the automotive industry M8 connectors are used in lighting, sensors, and onboard electronics.
M5 Circular Connector Industrial Automation
Industrial Automation
Miniature sensor integration. Micro-actuator signal transmission. Robotic arm connectivity.
M5 circular connector Robotics
Robotics
Cobot control interfaces. Joint encoder feedback. Compact gripper & vision systems.
M5 circular connector Measurement & Testing Instruments
Measurement & Testing
Portable sensors for temp, pressure, vibration. Durable DAQ systems. Calibration tools.
M5 circular connector Medical Technology
Medical Technology
Miniature diagnostics. Patient monitoring. Quick-connect portable instruments.
M5 circular connector Communication & Electronics
Communication & Electronics
Antenna modules. Board-to-cable links. Industrial handheld controllers.

M8 Circular Connector Technical Guide

Pin Configuration and Electrical Parameters of M8 Circular Connector

Pins 3A 4A 6A
Male M8-3A-Male M8-4A-Male M8-6A-Male
8A 5B 4D
M8-8A-Male M8-5B-Male M8-4D-Male
Pins 3A 4A 6A
Female M8-3A-Female M8-4A-Female M8-6A-Female
8A 5B 4D
M8-8A-Female M8-5B-Female M8-4D-Female

Pin Configuration and Electrical Parameters of M8 Connector

Standard
DIN EN 61076 - 2 - 104, IEC Specifications, RoHS Environmental Protection
Connection Types
Welding, PCB Dip - soldering, Pre - molded Cable (Straight/Right - angled)
Number of Contacts
2, 3, 4, 5, 6, 8 pins (Optional A/B/D coding)
Contact Material
Copper alloy, gold - plated
Rated Voltage
60V AC/DC and 30V AC/DC
Rated Current
Up to 4A
Protection Level
IP67 (when properly connected)
Operating Temperature
-40°C to +85°C
Installation Methods
Rear/Front of panel, Vertical/Inclined, Angle - adjustable
Housing Material
Brass (nickel-plated), Engineering plastic (PA9T)
Cable Sheath
PVC, PUR (optional)

M8 PCB Pins Arrangement

3A Core Male
4A Core Male
6A Core Female
8A Core Female
5B Core Male
4D Core Male


Different Installation Methods of Circular Connectors

M8 Circular Connector Front Fastened
M8 Circular Connector Front Fastened
M8 Circular Connector Rear Fastened
M8 Circular Connector Rear Fastened

Different Opening Sizes of Circular Connectors

Opening Size for M8 Circular Connector with M8×1 Threads
Opening Size for M8 Circular Connector with M8×1 Threads
Opening Size for M8 Circular Connector with M11×1 Threads
Opening Size for M8 Circular Connector with M11×1 Threads

Different Wiring Methods for Circular Connectors

M8 Circular Connector Solder Type
M8 Circular Connector Solder Type
M8 Circular Connector PCB Type
M8 Circular Connector PCB Type

Wiring Definition of M8 Sensor Connecting Cables

Pins 3 Pin Core Color Pins 4 Pin A Core Color Pins 4 Pin D Core Color
1 BN Image 1 BN Image 1 YE Image
2 - Image 2 WH Image 2 WH Image
3 BU Image 3 BU Image 3 OG Image
4 BK Image 4 BK Image 4 BU Image
-
Pins 5 Pin Core Color Pins 6 Pin Core Color Pins 8 Pin Core Color
1 BN Image 1 BN Image 1 WH Image
2 WH Image 2 WH Image 2 BN Image
3 BU Image 3 BU Image 3 GN
4 BK Image 4 BK Image 4 YE Image
5 GY Image 5 GY Image 5 GY Image
6 PK Image 6 PK Image
7 BU Image
8 RD

Global Compatibility and Mil-Spec Solutions

Our circular mil spec connectors and circular plug connectors meet stringent global requirements and are ideal for harsh industrial and outdoor environments. We also offer circular plastic connectors and circular power connectors to meet specific application requirements.
Explore our catalog of high-reliability connectors, including our complete M-series lineup, compatible with leading brands such as:
For more technical specifications and support, visit our company page: 
www.connoder.com
Note: CONNODER is a professional manufacturer specializing in the research and development and production of industrial circular connectors and cables, connectors, cables and peripheral equipment components. All brand names mentioned in this article are trademarks of their respective owners and are used only to indicate product compatibility.

Why Choose Connoder Circular Connectors?

With years of expertise, Connoder delivers:

Quality Assurance

ISO-certified manufacturing processes.

Customization

Tailored solutions for unique applications.

Global Support

Dedicated customer service and technical support.

Innovation

Cutting-edge designs for modern connectivity needs.

Certification

ISO 9001 and ISO 14001 certified.

Sales Network

Global customer base in over 50 countries.

Why Choose Connoder Circular Connectors?

If you're searching for reliable, custom-engineered circular connectors for your project, connoder is your trusted partner. 
Contact us today to request a quote or a free sample.

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