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The HRA36100U31X SQUARE D 3P 100A 600V circuit breaker is designed for optimal performance in demanding applications. With a robust 100KA interrupting capacity, it offers reliable protection against overloads and short circuits. This three-phase breaker is perfect for industrial and commercial use, ensuring safety and efficiency in your electrical systems.
The HRA36100U31X uses Square D's I-Line plug-in connection, which is compatible with Square D I-Line panelboards and switchboards designed for that bus system — common in commercial and industrial installations. It is not interchangeable with QO or Homeline residential loadcentres. Share your panelboard model number with us and we'll confirm compatibility.
The 100kA interrupting capacity (IC) means this breaker can safely clear a fault of up to 100,000 amperes without failing. Canadian Electrical Code (CEC) requires that your breaker's IC rating meet or exceed the available fault current at the point of installation. For high-capacity services or locations close to utility transformers, a 100kA-rated breaker like the HRA36100U31X is often specified. Consult your engineer or ESA-licensed electrician to verify the fault current level at your panel.
Availability of specific Square D HRA-frame variants can vary. Northern Breaker Group specializes in hard-to-find and obsolete breakers across Canada, with counter locations in Calgary, Edmonton, and Vancouver. Even if this unit is no longer in active production, we can often source verified stock. Contact us with the full part number and we'll check current inventory and lead times.
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