Square D PJA36080U44A Molded Case Circuit Breaker

This specific model is equipped with a Micrologic 6.0 A electronic trip unit. The "A" designation indicates it includes an integrated ammeter for real-time load monitoring, and it provides fully adjustable Long-Time, Short-Time, Instantaneous, and Ground-Fault (LSIG) overcurrent protection.

This plug-on molded case breaker is exclusively designed for use in Square D I-Line panelboards and switchboards. Its built-in jaw mechanisms allow it to seat securely onto the interior bus stack of I-Line distribution equipment.

Yes, the standard mechanical lugs are designed to accept up to three 3/0 AWG to 500 kcmil aluminum or copper cables per phase, making it easier to run parallel feeds for high-amp distribution.

The front face of the Micrologic 6.0 A trip unit features physical adjustment dials that allow you to set the pickup and delay values for each of the LSIG parameters. This adjustability ensures proper selective coordination with other upstream and downstream breakers in your facility.

The middle letter in the frame prefix indicates the short-circuit interrupting rating. PGA models provide a lower interrupting capacity, while PLA models offer a much higher interrupting capacity. All three variants share the same footprint, U44A electronic trip functions, and 800A load rating.

No. Because it utilizes the I-Line plug-on connection style, the breaker contains self-aligning mounting jaws that clamp directly onto the bus structure, removing the need for external bus connections or separate bolt-on hardware kits.

Failing to torque the lugs to the manufacturer specifications can lead to loose connections, which increases electrical resistance and causes severe overheating or phase-to-phase arcing. Always verify the exact torque values printed on the breaker label during installation.