HJA36045 - Square D - 3 Pole Non-Interchangeable Trip Thermal Magnetic Circuit Breakers
HJA36045 - Square D - 3 Pole Non-Interchangeable Trip Thermal Magnetic Circuit Breakers
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Square D HJA36045 – 45 Amp Molded Case Circuit Breaker, I-Line Plug-In
Designed for heavy-duty commercial systems, the Square D HJA36045 is a 3-pole, 45A PowerPacT H-Frame MCCB providing long-time and instantaneous (LI) protection. This 80%-rated breaker mounts into standard I-Line panelboards.
It serves as an ideal upgrade for legacy FA36045, FC36045, and FH36045 models. Featuring a 65 kAIC rating at 480VAC, the current-limiting MCCB uses fixed thermal and fixed magnetic trip settings and fully supports reverse feed applications.
Product Specifications
| Brand | Square D / Schneider Electric |
| Series | HJA (PowerPacT H-Frame) |
| Part Number | HJA36045 |
| Amperage | 45A |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Poles | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Motor Operator |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approvals | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25°C to 70°C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, 80% Rated |
Why Choose the Square D HJA36045?
- Multi-Model Cross-Reference: Upgrade path for FA36045, FC36045, and FH36045.
- 80% Rated: Suited for continuous commercial loads.
- High Interrupting Capacity: 65 kAIC at 480VAC.
- Reverse Feed Capable: Flexible for varied panel configurations.
Common Applications
- Commercial and industrial power distribution panels
- Continuous-duty branch and feeder circuits
- FA36045 / FC36045 / FH36045 panelboard upgrades
- Manufacturing and process control systems
Frequently Asked Questions
What panels is the HJA36045 compatible with?
Square D I-Line panelboards that accept plug-in breakers.
What is the interrupting rating of the HJA36045?
65 kA at 480VAC, 100 kA at 240VAC, 25 kA at 600VAC, and 20 kA at 250VDC.
What does the HJA36045 replace?
Legacy FA36045, FC36045, and FH36045 models.
Is it rated for continuous loads?
Yes — it's 80% rated for continuous commercial duty.
Is this a new unit?
Yes — this listing (SKU HJA36045-N) is new-in-box and ready for immediate installation.