Designed for commercial facilities, the Square D HLA36050 is a 3-pole, 50A molded case circuit breaker from the PowerPacT H-Frame series. It utilizes fixed thermal and magnetic trip elements to provide reliable LI protection. The device installs into Square D I-Line panelboards and switchboards via a plug-on connection. It comes equipped with load side lugs accepting 14-3/0 AWG conductors and can be used as a substitute for the HRA36050.
What type of panelboards are compatible with the HLA36050?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It utilizes an I-Line style plug-in connection and will not fit standard bolt-on or load center style panels.
What wire sizes are accepted by the standard lugs on the HLA36050?
The factory-installed lugs accept wire sizes from 14 AWG up to 3/0 AWG. They are rated for use with both aluminum and copper conductors.
What interrupting rating tier does the HLA36050 fall under?
The L in the catalog number indicates a high interrupting capacity tier within the PowerPacT H-Frame family. It delivers up to 125 kAIC at 240 VAC, 100 kAIC at 480 VAC, and 50 kAIC at 600 VAC, making it suitable for systems with high available fault currents.
How does the HLA36050 mount into the panel?
It features an I-Line plug-in mounting design. The breaker snaps directly onto the I-Line bus stack, which allows for faster installation and eliminates the need for separate mounting strap kits.
Can the HLA36050 be used to replace older F-Frame I-Line breakers?
Yes, the PowerPacT H-Frame series is the direct modern replacement for legacy Square D F-Frame I-Line breakers. The HLA36050 can replace older 50A, 3-pole models such as the FHL36050 or FAL36050 in existing I-Line panelboards.
What protection does the LI trip function provide on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) protection. Long-Time protects against sustained overloads, while Instantaneous provides immediate tripping during severe short circuits.
Is the HLA36050 rated for use in DC electrical systems?
Yes, this breaker is rated for DC applications. It provides an interrupting capacity of 20 kAIC at 250 VDC.
Can I adjust the trip settings on the HLA36050?
No, this specific breaker features a fixed thermal and fixed magnetic trip unit. The trip settings are factory calibrated for 50 amps and cannot be adjusted in the field.
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Customers rate this product 5.0 out of 5 based on 1 review.