Rail transit connectors are mainly used for electrical connection and signal transmission in rail transit systems, with the functions of anti-vibration, anti-electromagnetic interference (EMI/RFI), high temperature resistance, and reliable insulation. Our KMYD rail transit-suitable connectors cover specific models such as M8, M12, M16, M23 connectors (M series), SP13, SD15, LD20, FD25 connectors (SP/SD/LD/FD series), Russian standard connectors (GOST 16596-77: PK10-2, PK16-4, RT24 connectors) and American standard connectors (ANSI/UL 1977: Customized Series connectors), and RF connectors (SMA, N-type connectors), all optimized for such scenarios and widely applied in high-speed EMUs, urban rail transit (subways, light rail), locomotives, and other rail transit equipment and supporting systems.

1. Application Scenarios

High-speed EMUs (power transmission, signal communication, on-board equipment connection): M series connectors (M12, M23 connectors) for signal transmission and medium-power supply, RF connectors (SMA, N-type connectors) for on-board communication, and American standard Customized Series connectors for stable power transmission. 

Urban rail transit (subway, light rail) vehicles and station equipment: SP/SD/LD/FD series connectors (SP13, SD15 connectors) for on-board control and passenger information system connection, M8 connectors for small sensor wiring, and Russian standard connectors (PK10-2, PK16-4 connectors) for control circuit connection. 

Railway locomotives (traction system, braking system, control system connection): Russian standard RT24 connectors and American standard Customized Series connectors for traction system high-power transmission, M16 connectors for braking and control system signal connection. 

Rail transit supporting facilities (video monitoring, passenger information system, automatic ticket machines): M8, M12 connectors for sensor and monitoring equipment wiring, SP/SD series connectors (SD15 connectors) for passenger information system signal integration. 

2. Connector Structure & Forming Suggestions

Locking Structure: Cam lock or screw lock system is recommended to ensure stable connection and strong anti-vibration performance, avoiding loosening caused by train operation. 

Protection Level: IP54 or above for general scenarios; IP66/IP67 for outdoor or wet environments (such as coastal areas) to prevent dust and water intrusion. 

Anti-misinsertion Design: Precise positioning structure and anti-misinsertion design are required to avoid circuit faults caused by wrong connection, ensuring compatibility between different connectors. 

Structural Type: Single-core or multi-core modular design is adopted; single-wall shell structure is sufficient for most scenarios, and reinforced structure is optional for high-current power connectors. 

3. Summary Recommendations

Recommended Specifications: Covering our full range of KMYD rail transit connectors (M series: M8/M12/M16/M23 connectors; SP/SD/LD/FD series: SP13/SD15/LD20/FD25 connectors; Russian GOST connectors: PK10-2/PK16-4/RT24; American standard Connector, RF connectors), matching signal (1-15A) and power (15-500A) types to meet different on-board and ground equipment needs.

Recommended Structure: Modular design with anti-misinsertion and reliable locking, 360° EMI/RFI shielding, and IP54+ protection level. 

Recommended Materials: High-conductivity copper alloy terminals, high-temperature and flame-retardant insulators, corrosion-resistant alloy shell, with targeted coating treatment based on scenarios. 

Advantages: Strong anti-vibration, good electromagnetic compatibility, high temperature and corrosion resistance, long service life, and compliance with international and domestic rail transit standards. 

With scientific structure design and strict material configuration, rail transit connectors can ensure stable power supply and signal transmission in harsh and complex operating environments, providing reliable support for the safe and efficient operation of rail transit systems. 

KMYD combines many years of experience in connector manufacturing, specializing in developing and producing rail transit-adapted connectors. We provide customers with feasible and executable configuration suggestions from aspects such as structure design, material selection, and surface treatment, and can also offer customized services based on actual application scenarios and performance requirements