Siemens 3VA5340-5EC31-0AA0 – 400A 3 Pole Molded Case Circuit Breaker Clearance

Built for heavy-duty commercial power distribution, this 400A molded case circuit breaker utilizes thermal-magnetic technology to safeguard critical infrastructure. The TM230 trip unit offers fixed thermal and adjustable magnetic (LI) response for tailored defense. This breaker installs into Siemens panelboards and serves as an exact functional cross-reference for legacy JXD63B400 units. A Class M interrupting capacity of 35kA at 480V provides standard-level fault current limitation.