0320-1689-52 | Genuine Cummins® Onan CIRCUIT BREAKER

1. Compatible Equipment & Applications

The 320-1689 series of circuit breakers is engineered primarily for commercial-grade and heavy-duty utility power systems. The specific -52 sub-model is configured for particular amperage and voltage specifications common to:

• Cummins Onan Commercial Mobile Generators: Heavy-duty vehicle auxiliary power units (APUs) found in specialty commercial vehicles.

• Industrial Towable Power Units & Welders: Engine-driven standalone industrial equipment (such as high-capacity mobile welding grids or light towers) that use Onan or Cummins small diesel/gas power plants.

• Marine Auxiliary Power Systems: Selected commercial or pleasure craft onboard diesel generators that require vibration-resistant electrical trip controls.

2. Installation Location

This breaker is mounted directly into the main control panel, AC output box, or housing enclosure of the generator set. It acts as the final gatekeeper before the electricity generated by the alternator rotor is sent downstream to power the vehicle's appliances or commercial tools.

1. What is it?

This part is a specialized, high-integrity thermal-magnetic circuit breaker. Within the Cummins Onan catalog, the 320-1689 base part number represents a specific physical frame style of toggle breakers engineered to withstand severe, non-stop engine vibrations. The -52 suffix determines the precise factory electrical configuration (the exact trip amperage rating and the number of operational poles/phases).

2. Core Functions

• Overload & Thermal Protection: If the appliances, air conditioners, or tools drawing power from the generator exceed its safe operating limits, the breaker heats up internally and "trips" (shuts off) to prevent the generator's alternator coils from melting or catching fire.

• Short-Circuit Protection: In the event of a sudden electrical short (e.g., a damaged power cord or water entering an outlet), the breaker instantly cuts power downstream to protect the equipment and prevent an electrical explosion.

• Manual System Disconnect: It serves as a rugged physical switch, allowing technicians to manually flip the toggle to "Off" to cut power to the vehicle or machinery distribution panel while performing routine maintenance or diagnostic tests.