M16 Connector Type Analysis: How to Identify and Select the Right Connector?
In industrial automation, measurement and control, energy systems, rail transit and other application scenarios, M16 circular connectors are widely used due to their compact structure and good electrical performance. Correctly identifying the type of M16 connector and making a reasonable selection is crucial to ensuring the stability, safety and maintenance convenience of system operation. This article will analyze the structural types, common configurations and selection points of M16 connectors from a professional perspective.
1. What is an M16 connector?
M16 connector is a type of circular connector with an external thread diameter of 16mm , usually used for signal transmission, data communication and medium power connection . Its advantages are high mechanical strength, excellent electrical performance and good environmental sealing , especially suitable for outdoor and harsh working conditions.
2. Common types of M16 connectors
1. Classification by connection method
Solder Type : Suitable for small batch wiring, high stability;
Crimp Type : Suitable for automated assembly, reliable electrical connection;
Thread locking type : standard M16 external thread, with good vibration resistance;
Push-Pull locking type : quick plug and unplug to improve operating efficiency;
Snap-In : Easy to install, suitable for places with limited space.
2. Classification by interface form
Straight Plug : Commonly used for ordinary panel connection;
Right Angle Plug : Suitable for occasions with limited space or special cable guidance direction;
Front/Rear Mount Receptacle : Front-mounted and rear-mounted, easy to install and maintain;
PCB Mount : Directly soldered to the circuit board, suitable for modular design.
3. Classification by number of cores and interface characteristics
Common core numbers are: 2, 3, 4, 5, 6, 7, 8, 12, 14, 16, 19, 24pins ;
Shielded/Unshielded : Shielded type is suitable for high electromagnetic interference environment;
Signal type/power type/mixed type : allocated according to actual application.
3. Key performance parameters of M16 connector
Parameter name | Technical indicators |
| Rated voltage | Typically 250V or higher |
Rated current | 1A ~ 10A depending on the number of cores and conductor size |
| Protection level | IP67 / IP68, suitable for outdoor and wet conditions |
Operating temperature | -40℃ ~ +85℃ (special materials can reach +105℃) |
| Contact resistance | ≤5mΩ, ensuring stable transmission |
Insulation resistance | ≥100MΩ, to prevent leakage risk |
Plug life | ≥500 times, meeting the requirements of frequent loading and unloading |
Flame retardant grade | UL94 V-0 (high safety level) |
4. How to choose?
1. Application environment
Outdoor/hot and humid/dusty environment: IP67/IP68 protection level is preferred;
Vibration and shock: thread locking or push-pull design is preferred;
High-frequency interference area: Choose a connector with a shielding structure .
2. Signal/power requirements
Small current/signal: Choose a model with more cores and smaller current ;
Medium power: choose products with low core count and high current capacity ;
Mixed Signal/Power: Consider custom hybrid connectors .
3. Space layout and interface direction
Limited panels: choose straight or elbow design ;
Convenient for later maintenance: choose rear panel mounted socket ;
Onboard device connection: PCB soldering plate socket is preferred.
4. Connection method requirements
Batch installation and quick replacement: crimping + snap-on/push-pull locking is preferred;
High requirements for stability and reliability: threaded connection + metal shell is better.
