Square D HJA36150U43X Molded Case Circuit Breaker
- 150A
- 3 Pole
- I-Line
Square D
HJA36150U43X
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA36150U43X
Quantity
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Square D HJA36150U43X - 150A 3 Pole Molded Case Circuit Breaker
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Description
Part of the PowerPacT H-Frame family, this 150A molded case circuit breaker provides enhanced system monitoring via its Micrologic 5.2A trip unit. The integrated ammeter and adjustable LSI functions allow facility managers to fine-tune protection settings for complex commercial loads. Designed to mount into Square D I-Line panelboards, it acts as a highly capable upgrade for older KA36150, KH36150, and KC36150 units while maintaining a 65kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Series | HJA |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | I-Line |
| 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 | H |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, I-Line 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 | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included, Micrologic 5.2A Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB1, UL 489 |
| Approval | CCC, CE, CSA, HACR, IEC, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
Product FAQs
5 answersWhat type of panelboards accept the HJA36150U43X circuit breaker?
This breaker features an I-Line style plug-in connection on the line side and is specifically designed for installation in Square D I-Line panelboards and switchboards.
What does the U43X suffix indicate on this PowerPacT H-Frame breaker?
The U43X suffix designates a Micrologic 5.2A electronic trip unit. It provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) trip functions, along with an integrated ammeter for enhanced system monitoring and selective coordination.
How are the line and load connections configured on the HJA36150U43X?
The line side utilizes plug-in jaws that mount directly to the busbar stack of an I-Line panelboard. The load side features mechanical lugs that accept aluminum or copper conductors ranging from 14 AWG to 3/0 AWG.
Can the HJA36150U43X replace older legacy Square D 150A breakers?
Yes, this PowerPacT H-Frame breaker can serve as a modern replacement for legacy Square D KA36150, KH36150, and KC36150 I-Line circuit breakers. It fits the same panelboard bus structure while upgrading the system to solid-state electronic protection.
Are the trip settings on the HJA36150U43X field adjustable?
Yes, the solid-state electronic trip unit allows licensed electricians to adjust the pickup and delay settings for the long-time, short-time, and instantaneous (LSI) functions. This flexibility is critical for achieving precise selective coordination in complex commercial or industrial electrical systems.
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