Siemens EQ9985 Low Voltage Molded Case Circuit Breaker

The Siemens EQ9985 Low Voltage Molded Case Circuit Breaker is a 200 A, 4-pole main overcurrent protective device designed for 120/240 VAC service in Siemens low‑voltage distribution systems. As a molded‑case breaker, it provides primary protection for feeders and branch circuits against overloads and short circuits, and it is suitable for use as the main disconnect in compatible Siemens panelboards or switchgear. The 4‑pole configuration allows all four conductors to be isolated when the breaker trips, which is advantageous for multi‑wire and three‑phase installations requiring simultaneous disconnection for safety and fault isolation. Typical applications include main protection in commercial electrical distributions, industrial panels, and equipment feeders where a high‑current main breaker is needed, and the unit is designed to operate within standard 120/240 VAC electrical infrastructures. The EQ9985’s 200 A rating focuses on higher‑demand circuits while maintaining the compact, modular form factors common to Siemens molded‑case solutions.