Square D LAL36175 Molded Case Circuit Breaker

This is a unit-mount circuit breaker. It bolts directly to the backpan or mounting plate of Square D industrial enclosures, switchboards, or motor control centers, rather than plugging onto a busbar.

No, the LAL36175 is a unit-mount circuit breaker. For an I-Line panelboard, you will need the I-Line equivalent, such as the LA36175, which features plug-on jaws for busbar mounting.

The standard mechanical lugs accept either one 1 AWG to 600 kcmil aluminum or copper conductor, or two 1 AWG to 250 kcmil conductors per phase.

A feed-thru connection indicates that the breaker is designed with mechanical lugs on both the line and load sides, allowing wire conductors to be terminated directly at both ends of the breaker.

While the thermal overload protection is fixed at 175 amps, the magnetic instantaneous trip is adjustable. This allows electricians to tune the short-circuit response to coordinate with downstream devices or handle specific motor inrush currents.

Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 10kA, making it suitable for specific direct current applications in addition to standard AC systems.

Both are 175-amp, 3-pole, unit-mount L-Frame breakers, but they differ in interrupting capacity. The LAL36175 is rated for 30kA at 480VAC, while the LHL36175 is a high-interrupting version rated for 35kA at 480VAC.

The LAL36175 is part of Square D's legacy L-Frame series. While still widely used in existing installations, modern replacements typically utilize the PowerPact J-Frame or L-Frame series depending on the specific panel requirements.