Square D HJA260702 Molded Case Circuit Breaker

No. This breaker features an I-Line style plug-in connection and is exclusively designed for use in Square D I-Line panelboards and switchboards, not standard QO or Homeline residential load centers.

The I-Line design allows the breaker to plug directly into the bus stack of an I-Line panelboard or switchboard. This plug-on configuration eliminates the need for bolted bus connections, speeding up installation and replacement.

In the Square D PowerPacT H-frame series, the J designates the interrupting rating tier. It indicates a high interrupting capacity of 100kA at 240VAC and 65kA at 480VAC, which provides a higher level of fault protection than the standard D or G tiers.

While the thermal trip for overload protection is fixed at 70 amps, the magnetic trip for short-circuit protection is adjustable. This allows electricians to fine-tune the instantaneous trip threshold to properly coordinate with other protective devices in the electrical system.

The factory-installed lugs accept both aluminum and copper conductors ranging from 14 AWG to 3/0 AWG. Always verify and apply the correct torque specifications listed on the breaker faceplate during installation to ensure a secure connection.

No. Always de-energize the I-Line panelboard or switchboard before installing or removing circuit breakers to prevent arc flash hazards and ensure compliance with NFPA 70E safety standards.