Square D HGA36025 Molded Case Circuit Breaker

The "A" in the HGA catalog number designates an I-Line mounting configuration. This breaker plugs directly into the interior bus of Square D I-Line panelboards and switchboards. It cannot be installed in standard NQ, NF, QO, or Homeline enclosures.

No, this breaker carries a standard 80 percent continuous current rating. For applications where the load operates continuously for three hours or more, the maximum sustained current must not exceed 20 amps.

The HGA36025 features an I-Line plug-on line connection, leaving only the load side to be hardwired. The factory AL150HD mechanical lugs require a 3/16-inch hex bit. Always use a calibrated torque wrench to tighten the lugs to the precise specifications printed on the device label.

That depends on the available fault current of your system. HDA, HGA, HJA, and HLA breakers share the same physical footprint and I-Line mounting, but they offer different interrupting capacities. The HGA can safely replace a lower-rated HDA. However, if your panel requires the higher fault protection of an HJA or HLA, you cannot downgrade to the HGA model.

No. This breaker is equipped with a non-adjustable thermal-magnetic trip unit. Both the long-time overload (thermal) and instantaneous short-circuit (magnetic) trip points are fixed at the factory.

No. PowerPacT H-Frame breakers in this amperage range are built with factory-sealed, non-interchangeable trip units. If your application requires electronic tripping or different protection settings, the entire circuit breaker must be replaced.

Yes, the factory-installed load lugs are dual-rated for both aluminum and copper wiring ranging from 14 AWG to 3/0 AWG. When using aluminum conductors, it is standard practice to apply an appropriate oxide inhibitor before terminating the connections.