HGA36150 - Square D - Molded Case Circuit Breaker I-Line Plug-In - 150 Amp - 3 Pole - 600 Volt
HGA36150 - Square D - Molded Case Circuit Breaker I-Line Plug-In - 150 Amp - 3 Pole - 600 Volt
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Square D HGA36150 – 150 Amp Molded Case Circuit Breaker, I-Line Plug-In
The Square D HGA36150 is a heavy-duty, 3-pole thermal-magnetic molded case circuit breaker (MCCB) engineered for reliable overcurrent protection in commercial and industrial power distribution systems. Part of the PowerPacT H-Frame family, it delivers 150A of continuous protection with fixed long-time and instantaneous (LI) trip functions, and mounts directly into Square D I-Line panelboards and switchboards.
The HGA36150 replaces older KA36150 and KH36150 catalog numbers, giving facilities an in-production, HACR-rated upgrade path without panel modifications. With a 35 kAIC interrupting rating at 480VAC, it provides dependable current-limiting performance for demanding branch and feeder circuits.
Product Specifications
| Brand | Square D |
| Series | HGA (PowerPacT H-Frame) |
| Part Number | HGA36150 |
| Amperage | 150A |
| Voltage | 208Y/120VAC, 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC, 500VDC |
| Poles | 3 |
| AIC Rating | 65kA @ 208Y/120VAC & 240VAC, 35kA @ 480Y/277VAC & 480VAC, 18kA @ 600Y/347VAC & 600VAC, 20kA @ 250VDC & 500VDC |
| Mounting Style | I-Line Plug-In |
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Trip Technology | Thermal Magnetic (Non-Interchangeable) |
| Trip Function | LI – Long-Time, Instantaneous (Fixed Thermal, Fixed Magnetic) |
| Wire Range | 14 AWG – 3/0 AWG (Al/Cu) |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment, Motor Operator |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approvals | CE, CSA, HACR, IEC, NOM, UL |
| Temp Rating | -25°C to 70°C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Visual Trip Indicator |
Why Choose the Square D HGA36150?
- Direct I-Line Compatibility: Plugs straight into Square D I-Line panelboards and switchboards — no extra mounting hardware needed.
- Thermal-Magnetic Protection: Fixed long-time and instantaneous trip elements guard against sustained overloads and short circuits.
- HACR Rated & Current Limiting: Suitable for heating, air conditioning, and refrigeration branch circuits with demanding fault currents.
- Drop-In Replacement: Cross-references KA36150 and KH36150 for fast, compatible upgrades.
Common Applications
- Commercial and industrial power distribution panels
- HVAC and mechanical equipment feeders
- Manufacturing and process control systems
- Switchboard and panelboard retrofits
Frequently Asked Questions
What panels is the HGA36150 compatible with?
It's built for Square D I-Line style panelboards and switchboards that accept plug-in breakers — no additional mounting hardware is required.
What is the interrupting rating of the HGA36150?
35 kA at 480Y/277VAC and 480VAC, 65 kA at 208Y/120VAC and 240VAC, and 18 kA at 600VAC — see the specifications table for the full voltage breakdown.
Does the HGA36150 use a fixed or adjustable trip?
It uses a fixed thermal-magnetic (non-interchangeable) trip with LI (long-time, instantaneous) function.
What does the HGA36150 replace?
It's a direct upgrade path for the discontinued KA36150 and KH36150 breakers.
Is this a new unit?
Yes — this listing (SKU HGA36150-N) is new-in-box and ready for immediate installation.