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The BDA34020 SQUARE D 3-Pole Circuit Breaker is rated for 20 Amps at 480Y/277V with an impressive short circuit rating of 18KA. Designed for reliability and performance, this breaker is ideal for commercial and industrial applications. Perfect for protecting your electrical systems, ensuring safety with every use.
The BDA34020 uses Square D's I-Line plug-in mounting system, so it is compatible with Square D I-Line panelboards and switchboards designed for that bus system — commonly used in commercial and industrial facilities. It is not interchangeable with residential QO or Homeline loadcentres. Share your panelboard model with us and we'll verify compatibility.
Square D's BDA (NF frame) I-Line series has seen product-line updates over the years, and certain variants may be difficult to find through standard supply channels. Northern Breaker Group specializes in obsolete and hard-to-find breakers — contact us with your requirements and we'll advise on availability, whether new, reconditioned, or a suitable current-production replacement.
The BDA34020 is rated for 480Y/277V, 3-pole, 18kA. Using it on a lower-voltage system (e.g., 208Y/120V or 240V) is generally permissible from a voltage standpoint — breakers rated at higher voltages can typically be applied at lower voltages — but you must verify that the interrupting rating (18kA) meets or exceeds the available fault current at the installation point, and that the breaker's application complies with the Canadian Electrical Code (CEC). Consult a licensed electrician or engineer before applying it outside its labelled system voltage.
