FA26100AC SQUARE D 2P 100A 600/347V AC PH I LINE

The FA26100AC is an FA-frame molded-case breaker designed for bolt-on Square D panelboards and switchboards — such as NF and NQOD series — that accept FA-frame devices rated up to 600V. It is not suitable for residential QO or Homeline loadcentres. Share your panelboard model with us and we'll verify compatibility.

Square D FA-frame breakers have seen limited production runs, and some variants can be difficult to source new. Northern Breaker Group specializes in obsolete and hard-to-find breakers — we can often supply reconditioned or new-old-stock units. Contact our Calgary, Edmonton, or Vancouver counter for current availability and to request a quote.

The 'AC' suffix designates the breaker's specific interrupt rating and performance class within Square D's FA frame. When sourcing a direct replacement, the full catalogue number — including the suffix — must match to ensure correct interrupt capacity (18kA at 600/347V) and proper fit in your panelboard. Substituting a different suffix variant may not meet your installation's protection requirements, so always confirm the exact part number.