Product Description: The ABB S5N-3P-400A-NA is a Molded Case Circuit Breaker from the SACE Isomax family. It features a 3-pole design with a 600V voltage rating and 400A amperage capacity. This breaker has a 35kA@480V AIC rating and uses a bolt-on connection. It provides non-automatic protection and is part of the S5 frame size series.