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The HJA36040 SQUARE D 3P 40A 600V 25KA I LINE is a robust three-pole circuit breaker designed for industrial applications. With a current rating of 40 amps and a voltage rating of 600 volts, it offers reliable protection against overloads and short circuits. Ideal for heavy-duty use in various electrical systems.
No. The I-Line plug-in system uses a different bus-stab and mounting mechanism than Square D's QO series. The HJA36040 is designed exclusively for Square D I-Line panelboards and switchboards rated for 600V industrial use. It cannot be installed in QO or Homeline residential loadcentres.
Sourcing availability can vary. Northern Breaker Group specialises in obsolete and hard-to-find breakers, so even if the HJA36040 has been discontinued or has long lead times, we are often able to locate verified stock. Contact our Calgary, Edmonton, or Vancouver counters or request a quote online for current availability.
The 25kA (symmetrical) interrupting rating is the maximum fault current the HJA36040 can safely interrupt at 600V. For most light industrial and commercial distribution systems this is adequate, but larger facilities or installations close to utility transformers may require a higher AIC rating. We recommend verifying the available fault current at your panel before selecting this breaker — our team can assist if needed.
