Built for demanding industrial environments, the Square D HJL36100U44X is a 100A, 3-pole PowerPacT H-Frame molded case circuit breaker. It provides advanced overcurrent and ground fault protection for commercial facilities. Designed for unit-mount configurations, this breaker integrates into industrial control panels and switchboards. It features a Micrologic 6.2A electronic trip unit with adjustable LSIG settings and an integrated ammeter for precise monitoring.
What does the U44X suffix indicate on this PowerPacT breaker?
The U44X suffix specifies that the breaker is equipped with a Micrologic 6.2 A electronic trip unit. This provides adjustable Long-Time, Short-Time, Instantaneous, and Ground-Fault (LSIG) protection, along with an integrated ammeter for current monitoring.
What is the difference between the Square D HJL36100U44X and the HJA36100U44X?
Both are 100A, 3-pole PowerPacT H-Frame breakers with a J-interrupting rating and Micrologic 6.2 A trip units. The difference is the mounting style: the HJL36100U44X is a unit-mount (feed-thru) breaker with lugs, while the HJA36100U44X is designed for I-Line plug-in panelboards.
Can the HJL36100U44X be reverse fed?
Yes, this unit-mount breaker is suitable for reverse-fed applications. It features a feed-thru design with line and load side lug terminals, allowing the load side to be used as the line side when required by the installation design.
What types of enclosures and panels are compatible with the HJL36100U44X?
This unit-mount breaker is designed for integration into industrial control panels, switchboards, motor control centers (MCCs), and standard PowerPacT H-Frame enclosures.
Is the HJL36100U44X classified as a current-limiting circuit breaker?
Yes, PowerPacT H-Frame breakers with the J interrupting rating (such as the HJL series) are UL Certified as current-limiting circuit breakers, providing enhanced protection against high fault currents.
Are Square D and Schneider Electric HJL36100U44X breakers the same?
Yes. Square D is a brand owned by Schneider Electric. The HJL36100U44X is manufactured and marketed under both the Square D and Schneider Electric names, and the products are identical.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Square D HJL36040 - 40A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
4/9/26
Great Customer Service
Working with Superbreakers the team is so helpful. They answer the phone and are very accommodating. We had an issue with the refurbished breaker not working out and they helped get a new one out right away.