CONTACTOR (P/N s509) - New Surplus

The s509 is an electromagnetically actuated contactor that switches high-current DC circuits in aircraft electrical systems. This relay isolates the battery from the main bus, protecting circuits during shutdown and emergency conditions. MIL-PRF-6106 defines performance and environmental standards for this component.

Installation requires proper wiring per the aircraft maintenance manual and torque specifications following FAA AC 43.13-1B guidance. Verify operation after installation to ensure reliable circuit isolation and system safety.

What is the CONTACTOR (P/N s509)?

The s509 is an electromagnetically actuated contactor that switches high-current DC circuits in aircraft electrical systems. This relay isolates the battery from the main bus, protecting circuits during shutdown and emergency conditions.

Is the s509 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The CONTACTOR is available in: New Surplus. We recommend checking your aircraft's wiring diagrams and STC documentation, or contact our avionics team for compatibility assistance.

Does the s509 come with an 8130-3 airworthiness tag?

Availability of an FAA 8130-3 tag depends on the part condition. Overhauled and repaired units typically include 8130-3 documentation. As-removed units may include a removal tag with trace history. Contact us for specific documentation on the condition you need.

Do you offer bench testing for the s509?

We can arrange bench testing through our network of FAA-certified repair stations. Call (904) 998-9101 for testing availability and turnaround times, or submit an RFQ with your specific requirements.