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The FI36050 SQUARE D 3P 50A 600V I Line is a robust circuit breaker designed for reliable operation in commercial and industrial applications. With its three-pole configuration, it offers superior protection against overloads and short circuits. This breaker is ideal for ensuring safe electrical distribution in your systems.
The FI36050 uses Square D's I-Line plug-in mounting system, which is designed for Square D I-Line panelboards and switchboards used in commercial and industrial applications. It is not compatible with residential QO or Homeline loadcentres. If you're unsure whether your panelboard accepts I-Line breakers, share the panelboard model with us and we'll verify compatibility.
The Square D FI frame series is an older MCCB line and certain configurations can be difficult to source through standard distribution channels. Northern Breaker Group specializes in hard-to-find and obsolete breakers — contact us for current availability, and we'll do our best to source the FI36050 for you.
After a trip due to a high-level fault (especially near its 100 kA interrupting rating), the breaker should be inspected by a qualified electrician before being returned to service. Breakers that have interrupted a short circuit may suffer internal damage not visible externally. In many commercial and industrial settings, best practice — and some inspection authorities — recommend replacing an MCCB that has cleared a fault at or near its rated interrupting capacity.
