How To Choose The Right M16 Circular Connector For Your Project
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- Issue Time
- May 21,2025
Summary
M16 circular connectors have become the ideal choice for electrical connections due to their outstanding reliability, compact structure and environmental adaptability

In modern industrial automation, transportation, energy and communication fields, M16 circular connectors have become the ideal choice for electrical connections due to their outstanding reliability, compact structure and environmental adaptability. However, in the face of various specifications, functions and installation methods, how to select the right M16 connector for your project is a key issue.
1. Understand the core characteristics of the M16 circular connector
The M16 connector usually refers to a circular electrical connector with a thread diameter of 16mm, featuring the following general characteristics:
1.1 High protection level
Designed with IP67 or IP68, it has excellent water and dust resistance.
1.2 Multiple core number options
2 to 24-pin configurations are available to meet power, signal and hybrid transmission requirements;
1.3 Diverse connection methods
welding type, screw type, crimping type, etc., to adapt to different application scenarios;
1.4 Strong working stability
The copper-nickel plated housing and high insulation material provide excellent anti-interference ability and durability.




2. Key Points for Selection
2.1 Clearly define the usage environment
Consider whether there are factors such as water, dust, mechanical shock, high and low temperatures in the usage environment. If used outdoors or in damp areas, models with an IP68 rating should be given priority.
2.2 Match the specifications according to the electrical requirements of the application
Voltage and current levels: For example, 250V/5A is a common parameter and needs to be matched according to the equipment load.
Contact resistance and insulation resistance: Low contact resistance (such as ≤5mΩ) and high insulation resistance (≥100MΩ) can ensure transmission efficiency and safety.
2.3 Determine the number of needles and functional requirements
If only the power supply is to be transmitted, 2 to 3 pins are sufficient.
If the transmission signal or power + signal are mixed, it is recommended to choose a multi-core configuration with 6 pins or more.
2.4 Installation and maintenance methods
The welded type is suitable for occasions where the connection is firm but maintenance is not frequent.
Threaded or snap-on quick connectors are more convenient for maintenance and replacement.
Pay attention to the plug-and-pull life. Generally, more than 500 times can meet the regular industrial needs.
2.5 Whether a shielding structure is needed
In environments with severe electromagnetic interference (such as frequency converter control systems and rail transit), it is recommended to choose M16 connectors with EMI shielding structures.




3. Suggestions for Choosing High-quality Suppliers
3.1 Complete qualifications
Check whether it complies with the IEC61076 standard and whether it has passed UL/CE certification.
3.2 High product diversity
Whether it can provide customization services, multiple core numbers, cable lengths, etc.
3.3 Delivery cycle and after-sales service
Choose a manufacturer with a complete delivery date management and technical support team.
Summary
Selecting the appropriate M16 circular connector for the project not only concerns the stability of the system connection but also affects the safety and efficiency of the entire product life cycle. From clarifying the usage environment and electrical requirements to the selection of suppliers, every link cannot be ignored. Choosing the correct connector is an important prerequisite for ensuring the stable operation of the equipment and reducing maintenance costs.
If you are looking for a reliable M16 connector solution for your project, we can provide you with customized products and technical support of multiple specifications and high protection levels. Welcome to communicate and consult!