The ABB YO-1SDA038290R1 is an Electronic Trip Unit (ETU) for ABB's Tmax XT series Molded Case Circuit Breakers (MCCBs). This specific model is the PR222MP-P trip unit. The "-P" suffix typically indicates a specific variant or package, often including additional pre-wired features or a different delivery state (e.g., with a pre-installed communication module or a specific default configuration). Its core functionality is identical to the standard PR222MP, providing advanced protection, measurement, and communication capabilities.
