P-Series Russian Standard Circular Connectors for Rail Transit

PC Series Circular Connector Types and Specifications

P-Series Russian Standard Circular Connectors for Rail Transit Applications

P-Series Russian standard circular connectors are engineered for rail transit and rolling stock environments where vibration resistance and reliable electrical continuity are critical. These multipole connectors use screw locking and aluminum alloy housings to maintain stable connections in onboard equipment, signaling systems, and control modules operating under continuous dynamic loads.

Key Models in the P-Series Connectors

P16K4P Circular Connector – Multipole connector with threaded coupling and reliable electrical contacts. Rated for up to 200 A current and with excellent contact resistance performance, it supports power and signal transmission in control modules and onboard equipment.

P16J4A Circular Connector – A rugged plug-and-receptacle pair built on Russian connector standards, suitable for diverse interconnection tasks in rail vehicles. It offers consistent performance across a wide operating temperature range (-60 °C to +50 °C).

Other P-Series Variants (e.g., P20, P28, P32, etc.) – Expandable options depending on pin count and application needs, ideal for signaling systems, instrumentation, and modular cable assemblies.

Why P-Series Connectors Excel in Rail Transit

Robust Electrical Performance

P-Series connectors feature reliable contact interfaces with low contact resistance and high dielectric strength, ensuring consistent power and signal distribution across train systems.

Designed for Harsh Environments

These connectors are built with threaded coupling and durable housings that maintain stable connections under vibration and mechanical stress, essential for rail vehicles that experience constant dynamic loads.

Wide Operating Conditions

Operating from extreme cold to moderate heat (e.g., -60 °C to +50 °C), P-Series connectors handle the temperature variations encountered in tunnels, open tracks, and depot environments.

Flexible Pin Configurations

Multiple P-Series sizes and contact arrangements allow engineers to tailor solutions for power distribution, control signals, and data link connections within locomotives, passenger cars, and infrastructure equipment.

Selection Considerations for Rail Applications

When selecting a P-Series connector for your rail project, consider the following decision points:

• Pin count and contact arrangement – Match the core count (2-7 pins) to your power and signal requirements.
• Current rating – Verify the rated current matches your load profile; the P16K4P supports up to 200 A.
• Temperature range – Confirm the operating range (-60 °C to +50 °C) suits your installation environment.
• Mating style – Screw locking ensures vibration resistance for rolling stock applications.
• Housing and contact materials – Aluminum alloy housings with brass contacts plated in silver or gold provide corrosion resistance.

Suitable and Unsuitable Applications

Suitable for: Rail transit control modules, onboard equipment interconnection, signaling systems, instrumentation, and modular cable assemblies where threaded coupling and vibration resistance are required.

Not recommended for: Applications requiring waterproof sealing while unmated, high-density pin counts beyond the 2-7 pin range, or environments exceeding the +50 °C continuous operating limit without additional thermal management.

Installation and Maintenance Guidance

For reliable long-term performance, ensure proper torque on the threaded coupling during installation. Periodic inspection of contact surfaces and housing integrity is recommended, particularly in high-vibration rail environments. For detailed technical specifications including contact resistance, dielectric strength, and dimensional data, refer to the Technical Specifications section.

Inquiry Checklist

To receive accurate matching and configuration support, please provide the following information when inquiring:

• Required pin count and gender (male/female)
• Rated current and voltage for your application
• Cable diameter and termination requirements
• Operating temperature range and environmental conditions
• Mounting style (panel, cable, or in-line)
• Any applicable drawings or pinout diagrams

For a broader overview of available configurations, review the PC Series Circular Connector Types and Specifications. For related rail transit solutions, see the 2PM Series Russian Standard Circular Connector for Railway Systems.