ABB XT1SU3040AFF000XXX Miniature Circuit Breaker

ABB XT1SU3040AFF000XXX is a 3-pole Tmax XT molded‑case circuit breaker (MCCB) built on ABB’s XT1S 125 A frame and rated for 40 A. It features a thermal‑magnetic trip unit (TMF) and provides a short‑circuit current rating up to 22 kA, with a 600Y/347 VAC nominal rating for three‑phase systems. Front‑line and load‑side termination simplify installation in panelboards and switchgear, and the enclosure measures about 5.12 inches high, 3.0 inches wide, and 2.75 inches deep. Operating temperature range is -13 to 158 °F (-25 to 70 °C), enabling reliable protection for branch circuits in typical commercial and light‑industrial environments.