FQ Series Waterproof Circular Connectors for Rail Transit

M12 Circular Connectors

FQ Series Circular Connectors for Rail Transit Applications

The FQ Series waterproof circular connectors are engineered for railway systems, including trains, metros, and rail infrastructure. These connectors deliver stable power and signal transmission in demanding environments, supported by IP67 protection, low contact resistance, and vibration-resistant construction.

Key Models for Rail Applications

Selecting the right connector depends on your pin count and signal or power requirements. The FQ Series offers a range of configurations to match common rail transit needs:

• FQ14‑4TK / FQ14‑5Z – compact connectors for control signal applications.
• FQ18‑4TK / FQ18‑12YZP‑10 – versatile options for combined power and signal transmission.
• FQ24‑19TK – robust connector for high pin-count applications.

Construction and Installation Benefits

The FQ Series features a quick bayonet-style locking system, which simplifies installation and maintenance compared to threaded couplings. This design reduces assembly time in the field, a practical advantage for rolling stock maintenance schedules and infrastructure projects where downtime is costly.

Application Scope and Boundaries

These connectors are suited for onboard electronics, signaling systems, and wayside infrastructure connections where environmental sealing and vibration resistance are critical. They are not intended for applications requiring high-frequency data transmission or submersion beyond the stated IP67 rating while mated. For high-speed data or specialized protocols, confirm the specific interface requirements with your engineering team.

Buyer's Inquiry Checklist

To ensure accurate configuration and mating compatibility, please provide the following details when inquiring:

• Required pin count and gender (male/female) for each connector.
• Cable diameter and conductor cross-section for the application.
• Mounting style: cable connector, panel mount, or bulkhead feed-through.
• Specific operating temperature range and environmental exposure conditions.
• Any requirement for custom cable assembly or overmolding.

For a broader overview of compatible connector families, you may also review the 12G Series Circular Connectors for additional rail-ready options. For guidance on high-cycle applications between carriages, consult our rail transit connector FAQ.