Delivering robust current-limiting protection, the Square D HJA260902 is a 90A, 2-pole molded case circuit breaker from the PowerPacT H-Frame series. It is designed for reliable performance in commercial and industrial electrical distribution. This breaker installs into Square D I-Line panelboards and switchboards. It replaces older FA26090AC and FH26090AC breakers. Featuring a 100kAIC rating at 240V and 25kAIC at 600V, it utilizes fixed thermal-magnetic LI trip technology with an AC phase.
Current Limiting, HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Reverse Feed, Phase Connection AC
Product FAQs
10 answers
Which panelboards are compatible with the HJA260902 breaker?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It utilizes the I-Line plug-in mounting system and will not fit standard load centers or NQ/NF panelboards.
What does the J in the HJA260902 part number indicate?
The J designates the interrupting rating level within the Square D PowerPacT H-frame series. It indicates a high interrupting capacity of 65kA at 480VAC and 100kA at 240VAC.
What type of wire can be used with the lugs on this breaker?
The factory-installed lugs accept both aluminum and copper conductors ranging from 14 AWG to 3/0 AWG. Ensure proper torque specifications are followed during installation as outlined by Schneider Electric.
Does this breaker require a separate mounting hardware kit?
No. The HJA260902 features an I-Line style plug-in connection. The breaker snaps directly onto the I-Line bus stack in the panelboard, securing the electrical connection without the need for additional mounting brackets or hardware kits.
Can the trip settings on the HJA260902 be adjusted?
No. This breaker features a fixed thermal magnetic trip unit. Both the long-time and instantaneous trip functions are factory set and cannot be modified in the field.
Can the HJA260902 replace older Square D FA or FH series breakers?
Yes. The PowerPacT H-frame series supersedes the legacy F-frame breakers. The HJA260902 is a direct I-Line replacement for older 90A, 2-pole FA and FH breakers, such as the FA26090AC and FH26090AC, offering upgraded interrupting ratings.
Is this breaker rated for DC applications?
Yes, the HJA260902 is rated for 250/500VDC with an interrupting capacity of 20kA at 250VDC, making it suitable for specific direct current systems.
What safety precautions should be taken when installing this I-Line breaker?
Always ensure the panelboard is fully de-energized before installing or removing an I-Line breaker. Verify that the breaker's jaws are properly aligned with the busbar stack and fully seated to prevent arcing or overheating.
Does the HJA260902 require a specific phase connection on the I-Line bus?
Yes. The 2 at the end of the HJA260902 catalog number indicates it is factory-configured for an AC phase connection on the I-Line busbar stack. Ensure this matches your panel's phase requirements before installation.
Is the HJA260902 considered a current-limiting circuit breaker?
Yes, the PowerPacT H-frame breakers are designed with dual-break rotating contacts that reduce the amount of peak current during a short circuit fault, providing robust current-limiting protection.
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