The ABB SACE E4H 40 Air Circuit Breaker is a high‑capacity low‑voltage protective device from ABB’s Emax E4H series designed for three‑phase electrical power distribution systems. It is used to protect electrical circuits against overloads, short circuits, and fault conditions, and can be configured with electronic protection trip units for adjustable protection settings. The breaker is suitable for installation in industrial or commercial switchgear, distribution panels, or power cabinets where robust protection and high interrupting capacity are required. Variants include fixed (with horizontal, vertical, or front terminals) or withdrawable mounting styles.
