Product Description: The Siemens MD63T500 is a robust 3-pole circuit breaker from the Sentron Series, designed for high-performance electrical protection. It features thermal magnetic protection with LI - Long-Time and Instantaneous trip functions and is rated for 600V and 500A. This breaker is ideal for use with MD and HMD molded case circuit breakers and supports wire sizes from 1/0 AWG to 500 KCM CU/AL.