Exclusive Offer Siemens KM3B400 – 400A 3 Pole Molded Case Circuit Breaker

Designed to handle demanding electrical loads, the Siemens KM3B400 is a 400A, 3-pole MCCB. It operates at up to 600VAC and utilizes fixed thermal and adjustable magnetic trip settings for precise overcurrent protection. This legacy bolt-on breaker is compatible with Siemens P4 and P5 panelboards, along with SB1, SB2, and SB3 switchboards. Rated at 50kAIC at 480VAC, the unit features a trip-free mechanism and is HACR rated. It accommodates 1/0 AWG to 500 kcmil copper or aluminum wiring.