Product Description: The Siemens SHMD6B600LSI is a Molded Case Circuit Breaker from the Sentron Series. It features a 3-pole design with a 600V, 600A rating and a 65kA@480V AIC rating. This breaker includes solid-state protection with LSI (Long-Time, Short-Time, Instantaneous) functions and uses a Feed-Thru connection.