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The BQD390 – SIEMENS 3P90A 480V BOLT ON 14kA BREAKER is a reliable circuit breaker designed for optimal performance in demanding environments. With a 90 amp capacity and a 14 kA short circuit rating, this three-phase breaker ensures robust protection for your electrical systems. Ideal for industrial applications, it guarantees safety and efficiency.
The BQD is an industrial molded-case circuit breaker (MCCB) frame rated for 480V AC and higher short-circuit duties. Unlike the QP or QT plug-in residential breakers designed for home loadcentres, the BQD series uses a bolt-on connection and is intended for commercial or industrial panelboards and switchboards — not residential panels.
The BQD series has become increasingly difficult to source through standard distribution channels. Northern Breaker Group specializes in obsolete and hard-to-find breakers, and we maintain inventory of legacy Siemens industrial frames. Contact us or visit one of our Calgary, Edmonton, or Vancouver counters for availability and a quote.
A direct replacement must match the original breaker's frame, voltage rating (480V), amperage (90A), interrupt rating (14kA minimum), pole count (3P), and bolt-on mounting style. The BQD390 can serve as a replacement where these parameters align, but compatibility with the specific panelboard bus should always be verified. Send us your panel model number and we'll help confirm the correct fit.
