Square D - HJA36150U44X 150A 3-Pole 600V I-Line Solid State Circuit Breaker
Square D - HJA36150U44X 150A 3-Pole 600V I-Line Solid State Circuit Breaker
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The Square D HJA36150U44X is a 3-pole, 150-amp solid-state molded case circuit breaker (MCCB) rated for 600VAC with I-Line plug-in mounting. Manufactured by Schneider Electric, the HJ-frame solid-state trip unit provides adjustable, highly accurate protection for medium-to-large industrial feeder circuits. Engineered for applications where precise protection coordination and high interrupting capacity are required in demanding three-phase systems.
Specifications
| Attribute | Value |
|---|---|
| Part Number | HJA36150U44X |
| Manufacturer | Square D / Schneider Electric |
| Amperage Rating | 150A |
| Voltage Rating | 600VAC |
| Number of Poles | 3 |
| Trip Type | Solid State (Electronic) |
| Mount Type | I-Line Plug-In |
| Interrupting Rating | 65kA @ 600V |
| Standard | UL 489 Listed |
| Frame Series | HJ |
Key Features
- Solid-state electronic trip unit with adjustable long-time, short-time, and instantaneous settings
- I-Line plug-in mounting for straightforward installation in Square D I-Line switchboards
- 150-amp rating for industrial feeder and main circuit protection
- 3-pole configuration for complete three-phase 600V protection
- High 65kA interrupting rating at 600V for demanding industrial environments
- UL 489 Listed for NEC compliance
Common Applications
- Industrial feeder protection in 600V three-phase switchboards
- Motor control center (MCC) feeder circuit protection
- Sub-main breaker in industrial distribution systems
- Process plant and manufacturing facility power distribution
- Oil, gas, and petrochemical facility electrical systems
Frequently Asked Questions
What is the Square D HJA36150U44X?
The HJA36150U44X is a 150-amp, 3-pole, 600V solid-state I-Line plug-in MCCB from Square D. It provides adjustable overcurrent and short-circuit protection for feeder and main circuits in three-phase 600V industrial and commercial electrical systems.
What does the U44X suffix mean on the HJA36150U44X?
The U44X suffix on Square D solid-state MCCBs typically indicates the trip unit rating plug configuration, which sets the adjustable current range of the electronic trip unit. This affects minimum and maximum current trip settings available on the breaker.
Is the HJA36150U44X compatible with Square D I-Line panels?
Yes. The HJA36150U44X features I-Line plug-in mounting compatible with Square D I-Line switchboards and panelboards designed for HJ-frame breakers. Confirm bus rating and frame compatibility before installation.