Engineered for maximum fault restriction, the Square D FIJ34080 is an 80A, 3-pole current-limiting molded case circuit breaker. It provides thermal-magnetic protection for commercial networks up to 480VAC. This F-Frame breaker mounts into Square D I-Line panelboards, offering a secure plug-on connection. As a legacy component, it can be replaced by the newer HRA36080U31X model. With a 200kAIC rating at 480V, it significantly reduces let-through energy to prevent equipment damage.
Current Limiting, HACR Rated, Visual Trip Indicator
Special Features
Current Limiting
Product FAQs
6 answers
What type of panelboard is the FIJ34080 designed for?
This breaker features I-Line plug-on mounting and is designed exclusively for use in Square D I-Line panelboards and switchboards. It will not fit in standard load centers or lug-to-lug applications.
Can I replace an older FA or FH frame breaker with the FIJ34080?
Yes, the FIJ34080 is a legacy F-frame breaker that shares the same physical dimensions and I-Line mounting footprint as other 3-pole F-frame breakers, including FA, FH, and FC models. Ensure the 80A rating and interrupting capacity meet your system requirements.
Is the Square D FIJ34080 obsolete, and what is the modern replacement?
Yes, the legacy F-frame series has been discontinued by Schneider Electric. The modern direct replacement is the PowerPact H-frame series, which fits the same I-Line panelboard space.
What does the current limiting designation mean for the FIJ34080?
As a current-limiting circuit breaker, it is designed to clear electrical faults extremely fast, typically within a half-cycle. This limits the peak let-through current and energy, providing enhanced protection for downstream equipment.
How does the I-Line mounting system work on this breaker?
The breaker features plug-on jaws on the line side that press directly onto the I-Line busbar stack. The load side uses standard mechanical lugs to terminate the outgoing wires.
Can I adjust the trip settings on the FIJ34080?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time overload and instantaneous short-circuit trip functions are factory-set and non-interchangeable.
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