Square D HLA36080 Molded Case Circuit Breaker

This I-Line breaker is designed exclusively for use in Square D I-Line panelboards and I-Line switchboards. It uses a plug-on jaw connection to mount directly to the interior bus assembly.

Yes, PowerPacT H-frame I-Line breakers like the HLA36080 are the modern replacements for older 3-pole legacy F-frame breakers, such as the FA, FH, and FC series. Because both frame types require 4.5 inches of bus space, the HLA36080 can serve as a direct drop-in retrofit.

While it will fit the exact same panel space, the HLA36080 offers a much higher interrupting capacity (100kA at 480VAC) compared to the legacy FHL36080 (25kA at 480VAC). It is a suitable physical replacement that provides a significant upgrade in short-circuit protection.

The "L" indicates the interrupting rating tier of the breaker. Within the PowerPacT H-frame family, the L-tier provides up to 100kA of interrupting capacity at 480VAC. Other available tiers include D (18kA), G (35kA), and J (65kA).

The line side features plug-on jaws that push directly onto the panelboard's vertical bus bars. The breaker is then physically secured to the panel interior using a captive mounting bracket and screw.

No. I-Line circuit breakers cannot be reverse-fed. The line side connection is a fixed, plug-on jaw assembly designed exclusively to receive power from the panelboard bus, meaning power must flow from line to load.

The factory magnetic settings for the 80A HLA36080 include a hold current of 800A and a maximum magnetic trip threshold of 1450A.

Yes, the standard AL150HD mechanical lugs on the load side can be removed to accommodate optional compression lugs, distribution blocks, or copper-only lugs (such as the CU150HD) if your installation requires them.