The DK3400 is a K-frame molded case circuit breaker featuring a fixed thermal and magnetic trip mechanism, designed for three-pole applications. It operates at 400A with voltage ratings of 240VAC and 250VDC, offering an interrupting capacity of 65kAIC at 240VAC and 10kAIC at 250VDC. Constructed with aluminum components, it supports both line and load connections and is compatible with 50/60Hz power systems.