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The FH17020B SQUARE D 1P 20A 347V B PH I LINE is a high-quality single-pole circuit breaker designed for reliable performance in demanding applications. With a capacity of 20A and a voltage rating of 347V, this breaker provides strong circuit protection, ensuring safety and efficiency in your electrical systems. Ideal for both residential and commercial use.
The FH17020B uses Square D's I-Line plug-in connection style and is designed to mount in Square D I-Line panelboards and switchboards. It is not compatible with Square D QO or Homeline residential loadcentres. If you're unsure whether your panelboard accepts I-Line breakers, send us your panel model number and we'll confirm.
Yes. 347V is a standard voltage in Canadian commercial and industrial electrical systems, derived from a 600V, 3-phase, 4-wire distribution system (347/600V). This makes the FH17020B well suited for branch circuit protection of lighting and other 347V single-phase loads in commercial buildings — a very common application across Canada.
Availability can vary as the FH I-Line series includes both current and legacy part numbers. Northern Breaker Group specializes in obsolete and hard-to-find breakers, so even if this unit is no longer in active production, we can often source new, reconditioned, or tested surplus stock. Contact us for current availability and lead times.
