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The FH36090 Square D 3P 90A 600V I-Line circuit breaker ensures reliable protection for your electrical systems. Designed for three-phase applications, this breaker features a 90-amp capacity and withstands up to 600 volts. Ideal for both new installations and replacements, it offers durability and performance you can trust from Square D.
The FH36090 uses Square D's I-Line plug-in mounting system, making it compatible with Square D I-Line panelboards and switchboards such as the NQ and NF series that accept I-Line style breakers. It is not interchangeable with QO or Homeline residential loadcentres. Send us your panel model and we'll confirm the fit.
Availability can vary as Square D periodically updates or discontinues specific FH-frame configurations. Northern Breaker Group specializes in hard-to-find and obsolete breakers — contact us with your requirements and we'll advise on current stock, reconditioned units, or compatible replacements.
Yes, provided your existing panelboard uses the Square D I-Line plug-in bus system and the bus is rated for 600V/3-phase. Always verify the panel's bus ampacity, interrupting-rating requirements, and available pole spaces before installing. If you're unsure, share your panel details with our team and we'll help confirm suitability.
