The ABB 1SDA100355R1 is a three‑pole molded case circuit breaker (MCCB) from ABB’s SACE Tmax XT5N series with a solid‑state electronic release (EKIP DIP LS/I). It is designed for fixed installation with front terminals and provides dependable overload and short‑circuit protection in industrial and commercial low‑voltage AC power distribution systems. With a high rated current of 630 A and robust fault‑interruption capabilities, this breaker offers precise protection using the electronic EKIP trip unit, making it suitable for protecting feeders, main circuits, motors, generators, and other critical loads in demanding electrical installations.