Square D BJA36100 Molded Case Circuit Breaker

The BJA36100 is designed exclusively for Square D I-Line panelboards and switchboards. It uses an I-Line style plug-in connection on the line side, allowing it to mount directly onto the panel's bus assembly without additional line-side wiring.

Yes. Schneider Electric designed the PowerPacT B-frame as a direct, drop-in replacement for legacy F-frame (FA and FH) molded case circuit breakers. It occupies the same physical footprint in I-Line panelboards, making field upgrades straightforward.

The BJA36100 requires 4.5 inches of I-Line mounting space (1.5 inches per pole). This standard sizing ensures it aligns perfectly with existing bus configurations when retrofitting older F-frame units.

The line side uses a factory-configured I-Line plug-in jaw that presses directly onto the panelboard bus (ABC phase connection). The load side features traditional mechanical lugs that accept 14 AWG to 2/0 AWG aluminum or copper conductors.

No. The breaker utilizes a fixed thermal-magnetic trip unit (LI), meaning both the long-time overload protection and instantaneous short-circuit response are permanently factory-set. The 100-amp rating cannot be dialed down for lower ampacity loads.

Yes. While typically used in standard AC applications, this thermal-magnetic breaker is also UL rated for 250VDC systems, where it provides up to 50kA of short-circuit interrupting capacity.

The high short-circuit ratings, including 65kA at 480VAC and 100kA at 240VAC, mean the breaker can safely extinguish massive electrical faults without rupturing or failing mechanically. This provides essential protection for commercial networks with high available fault currents.

Yes, the BJA36100 is HACR rated. This certification means it has been rigorously tested and approved to protect commercial heating, air conditioning, and refrigeration equipment from overcurrent events.