CIRCUIT BREAKER (P/N MS3320-7 1/2) - New Surplus

The MS3320-7 1/2 is a single-pole, push-pull thermal circuit breaker rated for 7.5 amperes. This SAE AS58091-qualified component provides overcurrent protection in aircraft electrical power distribution systems. Designed with ambient-temperature compensation, it automatically trips when current exceeds the rated threshold, protecting circuits from overload damage.

The breaker mounts directly into aircraft panel bushings with screw-terminal connections for power and load circuits. Common in general aviation and corporate aircraft electrical panels where reliable fault protection is essential during normal operations and emergency conditions.

What is the CIRCUIT BREAKER (P/N MS3320-7 1/2)?

The MS3320-7 1/2 is a single-pole, push-pull thermal circuit breaker rated for 7. 5 amperes.

Is the MS3320-7 1/2 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The CIRCUIT BREAKER 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 MS3320-7 1/2 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 MS3320-7 1/2?

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.