Square D HGA36150U31X Molded Case Circuit Breaker
- 150A
- 3 Pole
- I-Line
Square D
HGA36150U31X
Molded Case Circuit Breaker
Brand
Square D
SKU
HGA36150U31X
Quantity
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Square D HGA36150U31X - 150A 3 Pole Molded Case Circuit Breaker
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Description
An ideal upgrade for older KA36150 breakers, the Square D HGA36150U31X is a 150A, 3-pole PowerPacT H-Frame MCCB. It is engineered for commercial power distribution, offering a 35kAIC interrupting rating at 480VAC. This breaker is built to install into Square D I-Line panelboards and switchboards, utilizing a convenient plug-on line connection. It features a Micrologic 3.2 electronic trip unit, providing highly accurate, adjustable LI (Long-Time, Instantaneous) protection functions.Specifications
| Brand | Square D |
|---|---|
| Part Number | HGA36150U31X |
| Series | HGA |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 208Y/120VAC, 65kA @ 240VAC, 35kA @ 480Y/277VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 18kA @ 600VAC |
| Amperage Range | 37.5-150A |
|---|
| Frame Type | HGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 14 AWG - 3/0 AWG (Al/Cu) |
| Max Wire | 3/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Communication Module |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, 80% Rated, True RMS Sensing |
Product FAQs
7 answersWhat type of panelboards is the HGA36150U31X compatible with?
This breaker features an I-Line style plug-in connection, making it compatible with Square D I-Line panelboards and switchboards. It is not designed for standard load centers or NQ/NF panelboards.
What does the "U31X" suffix mean in the HGA36150U31X catalog number?
The "U31X" indicates that this PowerPacT H-frame breaker is equipped with a Micrologic 3.2 electronic trip unit. This provides standard LI (Long-Time and Instantaneous) protection functions.
What do the letters "HGA" indicate in the HGA36150U31X part number?
"H" denotes the PowerPacT H-frame family. "G" indicates the interrupting rating tier (up to 65kA at 240V). "A" specifies the I-Line style plug-in mounting configuration.
How does the I-Line connection on the HGA36150U31X mount to the panelboard?
The breaker utilizes a plug-on design where the line-side jaws engage directly with the I-Line bus stack. It is then secured to the panelboard backpan using a mounting bracket, allowing for rapid installation without bolted line connections.
Can the HGA36150U31X replace older Square D circuit breakers?
Yes, the PowerPacT H-frame HGA36150U31X is a direct physical replacement for legacy Square D KA and KH frame I-Line breakers of the same amperage and pole configuration, such as the KA36150.
Does the Micrologic 3.2 trip unit on the HGA36150U31X require an external power supply?
No, the Micrologic 3.2 electronic trip unit is self-powered by the current flowing through the circuit breaker. It does not require an external power source for its standard protection functions.
Can I use the HGA36150U31X for applications requiring ground fault protection?
No, the U31X suffix indicates a Micrologic 3.2 trip unit, which only provides Long-Time and Instantaneous (LI) protection. For Ground Fault (LSIG) protection, a breaker with a Micrologic 6.2 trip unit (such as a U54X suffix) is required.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 14 reviews.
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Rating
14 reviews
- RERic E.Verified BuyerReviewingSquare D HGA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/18/26Great item
Breaker was in great shape, and packaged with care
- CFCameron F.Verified BuyerReviewingSquare D HGA36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/29/25HGA36050
Thank you, guys, for being SUPER quick with all your deliveries.
- CWCallie W.ReviewingSquare D HGA36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/28/22Great company
Have made multiple orders through them and they always ship out fast and the correct items. Will continue to do business with them.
- JMJustin M.ReviewingSquare D HGA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/8/22Great service!
Prompt shipping.
- SMSteven M.ReviewingSquare D HGA36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/11/22Great service
I need the 2 breakers NDA, but they had one in stock, and had to get the other from there supplier. Some how I received both breaker the next day and got the job done. GREAT SERVICE!!