The ABB T6H 630 PR221DS‑I is a fixed‑type molded case circuit breaker designed for industrial and commercial electrical power distribution. It combines a robust breaker frame with a PR221DS‑I electronic trip unit that offers reliable protection and adjustable settings for overload, short‑time and instantaneous fault conditions. The breaker is suitable for protecting feeders, motors, and distribution circuits up to 630 A and is engineered to meet IEC standards for safety and performance. It features front‑mounted bolt‑on connections for easy installation.