English
Shenzhen REUNION Electronic Co., Ltd. has manufactured the M20 series connector since 2011 for equipment that demands higher current handling and greater contact density than smaller metric circular formats. Typical deployments include servo motor power, multi-axis drive systems, and industrial machinery where a single connector must carry substantial current alongside control signals without occupying excessive panel space.
The M20 thread size allows larger contact cavities compared to M16 or M15 designs, enabling the use of conductors up to 2.5 mm² in many configurations. Continuous current ratings commonly reach 16 A to 20 A per power contact, depending on pin count, ambient temperature, and wire insulation class. REUNION performs thermal rise testing on each new contact layout to verify that the connector operates within safe limits under sustained load, rather than relying solely on theoretical calculations.
Machinery often requires motor power, brake control, and encoder feedback on the same cable run. The M20 format provides enough cross-sectional area to separate high-current pins from low-level signal pins within a single insert. This approach reduces cable clutter and simplifies panel wiring. The design principles are consistent with those covered in the Power and Signal Connector category, where isolation and shielding considerations are examined for mixed-contact layouts.
The threaded coupling of the M20 connector distributes retention force across a larger thread diameter, providing stable mechanical engagement under vibration and shock. Panel-mount receptacles can be configured for front or rear mounting, while cable plugs are available in straight and angled versions. When equipment is exposed to washdown, coolant, or outdoor conditions, sealed variants with O-rings and cable glands achieve IP67 or higher. For a detailed explanation of ingress protection levels, the Waterproof Connector section provides relevant test definitions and material guidance.
REUNION’s factory occupies approximately 4,000 square meters, operates 10 production lines, and employs about 150 people. The engineering group completes more than 30 customized projects each year, supported by 13 patents and 2 software copyrights. Common M20 modifications include non-standard pin assignments, custom keying, shielded housings, and overmolded cable exits. Finished Cable Assembly units are produced in-house, covering wire cutting, termination, and final electrical testing before dispatch.
Quality systems align with ISO 9001, ISO 14001, and ISO 13485 where applicable. Compliance testing to UL, CB, and CQC requirements is performed on relevant product lines. Each batch is tracked through the ERP system, linking raw material certificates, production parameters, and test results into a traceable record.
The larger contact cavities accept thicker conductors and reduce thermal rise at currents that would overload smaller metric formats. The threaded coupling also maintains stable contact pressure under the vibration generated by motors and drives. REUNION can provide specific current ratings and derating curves based on the number of power contacts in the selected configuration.
Yes. Hybrid inserts can assign larger contacts for power phases and smaller contacts for encoder signals, with appropriate spacing and shielding to prevent crosstalk. REUNION validates each custom layout for insulation resistance, dielectric strength, and signal integrity before production release.
Yes. Overmolded cable entries eliminate a potential leak point and provide strain relief. REUNION supplies complete sealed assemblies with customer-specified cable length, wire gauge, and jacket material, then tests each unit for ingress protection and electrical continuity before shipment.
