M9 Circular Connector
The M9 circular connector features IP67 - rated waterproof, oil - resistant, and low - temperature - resistant properties. It operates stably and
reliably, supports threaded - locking connections, ensuring excellent electrical performance even in vibrating environments.
It is widely applied in automotive sensors, photoelectric switches, proximity switches, industrial automation equipment, robot sensors, as well as
the integrated wire harnesses and signal connections in Industry 4.0 intelligent systems.
Connoder can provide customers with diverse and innovative connection solutions, including standard and customized M9 connectors and
assembled cable components, facilitating the efficient interconnection of devices.
M9 Circular Connector Types
Explore our M9 circular connector range today to discover the best connectivity solution for your project! If you need more technical details or customization advice on the M9 circular connector, please feel free to contact us for more information and support.

M9 Panel Mount Connector
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.

M9 Assembled Connector
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

M9 Pre-Molded Cable Assemb
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.
- Circular Connectors
- Type
- M5 Circular Connector
- M8 Circular Connector
- M9 Circular Connector
- M12Circular Connector
- M14Circular Connector
- M16Circular Connector
- 7/8 " Circular Connector
- Shape
- Straight
- Right Angle
- Gender
- Female
- Male
- Number of cores
- 2 Pin
- 3 Pin
- 4 Pin
- 5 Pin
- 6 Pin
- 7 Pin
- 8 Pin
- 9 Pin
- 12 Pin
- 14 Pin
- 16 Pin
- 17 Pin
- 19 Pin
- 24 Pin
- 1+PE
- 2+PE
- 3+PE
- 4+PE
- 5+PE
- 6+PE
- 3+5 Pin
- 3+7 Pin
- 2+FE
- 3+FE
- 4+FE
- Foolproof type
- A
- B
- C
- D
- K
- L
- M
- P
- S
- T
- X
- General
- Protection level
- IP66
- IP67
- IP68
- Wiring method
- Solder type
- PCB type
- Screw type
- SMD type
- Installation type
- Rear Fastened
- Front Fastened
- Square Flange Socket
- Sockets
- SMD Sockets
- Plastic Assembled
- Metal Assembled
- Curved Metal Assembly
- Ordinary Overmolded Type
- Overmolded Type
- Shielding type
- Shielded
- Unshielded
- Yes/No Optional
- Housing material
- Metal
- Plastic
- Metal + Plastic
- Rated voltage
- 30V
- 48V
- 50V
- 60V
- 63V
- 125V
- 250V
- 630V
- 300V
- 800V
- Rated current
- 0.5A
- 1A
- 1.5A
- 2A
- 3A
- 4A
- 5A
- 6A
- 7A
- 8A
- 9A
- 12A
- 13A
- 16A
- Insulation resistance
- 5mΩ
- 8mΩ
M9 Circular Connector
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The M9 8 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
The M95 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
The M9 8 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
The M95 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
The M9 8 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
The M95 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
The M95 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
The M9 8 Pin Circular Connectors is a connection solution designed for industrial applications with high reliability and stability.
M9 Circular Connector
Downloads on The Topic of Circular Connectors
Applications of Circular Connectors
Circular plug connectors and circular power connectors are used across various industries.
Connoder’s connectors are engineered for durability, with IP67/IP68 ratings for water and dust resistance, ensuring performance in harsh environments.

Industrial Automation
Connection of miniature sensors (proximity, photoelectric, capacitive, ultrasonic).
Signal transmission for micro-actuators.
Compact connections in robotic arms and precision automation equipment.

Robotics
Data and control signal interface in collaborative robots (cobots).
Encoder and feedback sensor connections in robotic joints.
Use in compact robotic grippers and vision modules.

Measurement & Testing Instruments
Connection of portable measuring devices (temperature, pressure, vibration).
Data acquisition systems requiring small and durable connectors.
Precision test and calibration tools.

Medical Technology
Miniature medical devices and diagnostic equipment.
Patient monitoring systems where compact and safe connections are critical.
Portable medical instruments requiring quick-connect interfaces.

Communication & Electronics
Antenna connections for small wireless modules.
Board-to-cable and cable-to-cable links in compact electronic devices.
Industrial handheld terminals and mobile controllers.
Circular Connector Technical Guide
Comparison of Pin Numbers and Coding Differences of Circular Connectors
Standard | IEC 61076 - 2 - 101 / DIN EN 61076 - 2 - 105 |
Connection Types | Welding, PCB Dip - soldering, Pre - molded Cable (Straight/Right - angled) |
Number of Contacts | 3 Core, 4 Core, 5 Core, 6 Core, 7 Core, 8 Core |
Contact Material | Copper alloy, gold - plated |
Rated Voltage | 125 VAC/DC |
Rated Current | 1 A、3A、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) |
Pin Configuration and Electrical Parameters of M9 Circular Connectors
Pins | 2 | 3 | 4 | 5 |
Male | ![]() |
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6 | 7 | 8 | ||
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Pins | 2 | 3 | 4 | 5 |
Femle | ![]() |
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6 | 7 | 8 | ||
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M9 PCB Pins Arrangement

3 Core Male

4 Core Male

3 Core Female

4 Core Female

6 Core Male

7 Core Male

8 Core Male

3 Core Female

4 Core Female

4 Core Female

5 Core Female

6 Core Male

7 Core Male

8 Core Male
Different Installation Methods of Circular Connectors

M9 Circular Connector Front Fastened

M9 Circular Connector Rear Fastened
Different Opening Sizes of Circular Connectors

Opening Size for M9 Circular Connector with M12×0.5 Threads
Different Wiring Methods for M9 Circular Connectors

M9 Circular Connector Solder Type

M9 Circular Connector PCB Type
Wiring Definition of M9 Circular Connectors
Pins | 2 Pin Core Color | Pins | 6 Pin Core Color | ||
1 | BN | ![]() |
1 | BN | ![]() |
2 | BU | ![]() |
2 | WH | ![]() |
3 | BU | ![]() |
|||
Pins | 3 Pin Core Color | 4 | BK | ![]() |
|
1 | BN | ![]() |
5 | GY | ![]() |
2 | BU | ![]() |
6 | PK | ![]() |
3 | BK | ![]() |
|||
Pins | 7 Pin Core Color | ||||
Pins | 4 Pin Core Color | 1 | WH | ![]() |
|
1 | BN | ![]() |
2 | BN | ![]() |
2 | WH | ![]() |
3 | GN | ![]() |
3 | BU | ![]() |
4 | YE | ![]() |
4 | BK | ![]() |
5 | GY | ![]() |
- | 6 | PK | ![]() |
||
Pins | 5 Pin Core Color | 7 | BU | ![]() |
|
1 | BN | ![]() |
|||
2 | WH | ![]() |
Pins | 8 Pin Core Color | |
3 | BU | ![]() |
1 | WH | ![]() |
4 | BK | ![]() |
2 | BN | ![]() |
5 | GY | ![]() |
3 | GN | ![]() |
4 | YE | ![]() |
|||
5 | GY | ![]() |
|||
6 | PK | ![]() |
|||
7 | BU | ![]() |
|||
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:
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
www.connoder.com
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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