Engineered for heavy-duty use, the Square D HGA36150 is a 150A, 3-pole MCCB. Part of the PowerPacT H-Frame series, it delivers dependable thermal-magnetic protection with fixed long-time and instantaneous (LI) functions. Featuring an I-Line plug-on connection, it mounts easily into Square D I-Line panelboards and switchboards. It also replaces older KA36150 and KH36150 models. With a 35kAIC rating at 480VAC, this HACR-rated unit provides excellent current-limiting performance.
HACR Rated, Current Limiting, Reverse Feed, Visual Trip Indicator
Product FAQs
7 answers
Which older circuit breaker models does the HGA36150 replace?
The HGA36150 serves as a direct replacement for older 150A Square D KA36150 and KH36150 breakers. The modern PowerPacT H-frame footprint mounts into the same I-Line panelboard space.
Can I field-install a shunt trip or undervoltage release in the HGA36150?
Yes. PowerPacT H-frame breakers support field-installable accessories, including shunt trips, undervoltage releases, and auxiliary switches. These components mount securely behind the front accessory cover.
Will the HGA36150 install into a standard QO or NQ panelboard?
No. The HGA36150 features an I-Line plug-on connection designed exclusively for Square D I-Line panelboards and switchboards. It will not fit into QO, NQ, or NF series load centers.
What does the letter G in the HGA36150 part number represent?
The letter G designates the interrupting capacity tier within the PowerPacT H-frame family. For this specific model, the G-rating signifies an interrupting capacity of 35kA at 480VAC and 65kA at 240VAC.
How does the I-Line connection on the HGA36150 attach to the panel?
The line side of the breaker uses plug-on jaws that clamp directly onto the panelboard bus assembly. The load side utilizes mechanical lugs for outgoing wire connections, allowing the breaker to seat securely on the bus without requiring line-side cabling.
Is the HGA36150 approved for HVAC equipment?
Yes. As a UL 489 listed circuit breaker, the HGA36150 inherently carries a HACR rating. This makes it fully compliant for protecting heating, air conditioning, and refrigeration equipment group motor circuits.
How can I manually test the mechanical trip function on the HGA36150?
You can manually verify the mechanical operation of the trip unit by pressing the dedicated push-to-trip button located on the front face of the breaker. This will snap the operating handle into the center tripped position.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.