Square D HJA261001 PowerPact H-Frame Circuit Breaker | 100A 2-Pole 600V I-Line
Square D HJA261001 PowerPact H-Frame Circuit Breaker | 100A 2-Pole 600V I-Line
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Square D HJA261001 — PowerPact H-Frame Molded Case Circuit Breaker
The Square D HJA261001 is a heavy-duty, two-pole thermal magnetic molded case circuit breaker from Schneider Electric's PowerPact H-Frame series. Engineered for reliable overload and short-circuit protection in commercial and industrial electrical systems, this breaker delivers 100 amps of capacity at up to 600V AC / 250V DC — with a high interrupting rating of 65kA at 480V AC for demanding applications.
Built with I-Line plug-in technology for fast, tool-friendly installation and removal in I-Line panelboards, the HJA261001 is the go-to solution for electricians and facility managers who need dependable circuit protection with minimal downtime.
Key Specifications
| Part Number | HJA261001 |
| Manufacturer | Square D by Schneider Electric |
| Series | PowerPact H-Frame (HJA Series) |
| Number of Poles | 2-Pole (AB Phase) |
| Current Rating | 100 Amps |
| Voltage Rating | 600V AC / 250V DC |
| Interrupting Rating | 65kAIC @ 480V AC | 25kAIC @ 600V AC |
| Trip Type | Thermal Magnetic (LI: Long-Time & Instantaneous) |
| Connection Type | I-Line Style Plug-In (line side) / Lugs (load side) |
| Frame | H-Frame |
| Phase | 1-Phase |
| Dimensions | 9.73"H × 2.94"W × 4.8"D |
| Operating Temperature | Up to 104°F (40°C) |
| Certifications | UL Listed | CSA Certified | IEC Rated |
| Condition | New |
| SKU | HJA261001-N |
Why Choose the Square D HJA261001?
High Interrupting Capacity
With an interrupting rating of 65kA at 480V AC, the HJA261001 handles high fault currents found in industrial distribution systems, making it ideal for environments where safety margins cannot be compromised.
I-Line Plug-In Design
The I-Line construction allows this breaker to plug directly into Square D I-Line panelboards — no tools required for installation or removal. This speeds up panel work significantly and reduces labor costs on large projects.
Dual-Break Rotating Contacts
All PowerPact H-Frame breakers feature dual-break rotating contacts that help limit peak current during short-circuit faults, reducing damage to connected equipment and downstream components.
Thermal Magnetic Trip Unit
The integrated thermal magnetic trip provides two-layer protection: long-time (thermal) overload protection for sustained overcurrents and instantaneous trip for sudden short-circuit faults — both without requiring external sensors or wiring.
Push-to-Trip Test Button
An integral push-to-trip button lets technicians manually verify trip functionality without shutting down the panel — a critical safety and maintenance feature for NEC compliance.
Common Applications
- Commercial and industrial power distribution panels
- Motor control centers (MCCs)
- HVAC systems and large mechanical equipment
- Manufacturing facilities and data centers
- Square D I-Line panelboard retrofits and upgrades
- Feeder and branch circuit protection up to 600V
Compatibility
The HJA261001 is designed for use with Square D I-Line panelboards. It shares standardized mounting holes, handle locations, trim dimensions, and accessories with other PowerPact H, J, and L-Frame breakers — making panel standardization and mixed-frame designs seamless.
Frequently Asked Questions
What is the interrupting rating of the Square D HJA261001?
The HJA261001 has an interrupting rating of 65kAIC at 480V AC and 25kAIC at 600V AC — placing it in the high-interrupting capacity "J" rating category within the PowerPact H-Frame series.
Is the HJA261001 compatible with I-Line panelboards?
Yes. The HJA261001 uses I-Line plug-in terminations on the line side and mechanical lugs on the load side, making it fully compatible with Square D I-Line panelboard systems.
What is the difference between HJA261001 and HDA261001?
Both are Square D PowerPact H-Frame 2-pole 100A breakers with I-Line connections. The key difference is the interrupting rating: the HJA261001 offers 65kAIC at 480V AC (J-rated), while the HDA261001 provides 18kAIC at 480V AC (D-rated). Choose the HJA for higher fault current environments.
What trip functions does the HJA261001 include?
It includes Long-Time (L) thermal overload and Instantaneous (I) short-circuit trip functions — standard thermal magnetic protection suitable for most feeder and branch circuit applications.
Is the HJA261001 UL Listed?
Yes. The Square D HJA261001 is UL Listed, CSA Certified, and IEC Rated, meeting the most common North American and international electrical safety standards.