Square D HJL36150U44X Molded Case Circuit Breaker
- 150A
- 3 Pole
- Unit Mount
Quantity
Square D HJL36150U44X - 150A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built to handle complex coordination needs, the Square D HJL36150U44X is a 150A, 3-pole PowerPacT H-Frame circuit breaker. It is designed for commercial and industrial power distribution systems requiring robust 600VAC performance. This unit-mount MCCB fits Square D industrial control panels, switchboards, and serves as a main in NQ or NF panelboards. It also replaces legacy KAL36150 K-Frame breakers with a retrofit. The integrated Micrologic 6.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJL36150U44X |
| Series | HJL |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC |
| Amperage Range | 60-150A |
|---|
| Frame Type | HJL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Industrial Control Panels, Switchboards, Enclosures, NQ Panelboards (as Main), NF Panelboards (as Main) |
| 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 | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment, Lug Kits, Terminal Shields |
|---|---|
| Accessories | Micrologic 6.2 A Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, HACR, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, Visual Trip Indicator, True RMS Sensing, Ground Fault Protection, Mercury Free, PVC Free |
Product FAQs
6 answersWhat does the U44X suffix indicate on the HJL36150U44X breaker?
The U44X suffix designates that the breaker is equipped with a Micrologic 6.2 A (Ammeter) electronic trip unit. This provides adjustable Long-Time, Short-Time, Instantaneous, and Ground Fault (LSIG) protection, along with integrated current monitoring capabilities.
Can I install the HJL36150U44X in an I-Line panelboard?
No, the L in the HJL prefix indicates this is a unit-mount breaker with lugs on both the line and load sides. For an I-Line plug-on connection, you would need an HJA or HGA frame breaker instead.
Is the HJL36150U44X suitable for reverse-feed applications?
Yes, Square D PowerPacT H-frame breakers are generally suitable for reverse feeding. However, when backfeeding breakers with Micrologic electronic trip units, always verify that your specific application and local codes permit it, and ensure any applicable reverse power flow settings are properly configured.
What does the J in the HJL36150U44X part number signify?
The J indicates the breaker's interrupting rating tier within the PowerPacT H-Frame family. It signifies a high interrupting capacity of 100kA at 240V, 65kA at 480V, and 25kA at 600V.
Which Square D panelboards can accept the HJL36150U44X as a main breaker?
This unit-mount breaker can be installed as a main breaker in Square D NQ and NF series panelboards when used with the appropriate main breaker mounting kit. It is also commonly used in industrial control panels, switchboards, and standalone enclosures.
What protection functions are included with the Micrologic 6.2 A trip unit?
The Micrologic 6.2 A is an electronic trip unit that provides LSIG protection: Long-Time (overload), Short-Time (short circuit with intentional delay for coordination), Instantaneous (high-level short circuit), and Ground Fault protection. The A designation also means it includes an integrated ammeter for current measurement.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- KLKari L.Verified BuyerReviewingSquare D HJL36040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/9/26Great 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.