Square D LCL36350 Molded Case Circuit Breaker

This unit-mount breaker is engineered for bolt-on installation in legacy Square D switchboards, motor control centers, and standalone enclosures. It is not compatible with I-Line panelboards, which require plug-on mounting.

For modern system upgrades, the legacy LCL36350 is replaced by the Square D PowerPacT LJL36400U31X. While the replacement is a 400A frame, its Micrologic electronic trip unit can be adjusted to match the 350A rating of the original breaker.

The standard mechanical lugs accept either a single 1 AWG to 600 kcmil conductor or dual 1 AWG to 250 kcmil conductors per phase. They are rated for both aluminum and copper (Al/Cu) wire.

The breaker features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection. The magnetic element is adjustable, allowing electricians to tune the instantaneous short-circuit trip threshold to coordinate with downstream devices.

The LI designation means the breaker provides Long-Time (L) thermal protection for sustained overloads and Instantaneous (I) magnetic protection for immediate clearing of high-level short circuits.

The breaker provides extra-high interrupting capacity, delivering 100kAIC at 240VAC, 65kAIC at 480VAC, and 35kAIC at 600VAC, making it suitable for industrial systems with high available fault currents.

Yes, it is a unit-mount, bolt-on circuit breaker. It must be bolted directly to the mounting pan or chassis of the switchboard or enclosure, unlike I-Line variants which plug directly into a busbar.

Yes, the 600VAC maximum voltage rating means it is fully compatible with 240VAC, 277VAC, and 480VAC systems. The interrupting capacity (AIC) increases at these lower voltages, providing up to 100kAIC at 240VAC.