Siemens ED43B070L Feed-Through Circuit Breaker

Siemens ED43B070L is a three‑pole feed‑through molded‑case circuit breaker rated for 70 A at 480 V (AC) with an 18 kA interrupting capacity at 480 V. Part of the Sentron ED family, it uses a thermal‑magnetic trip unit with distinct long‑time and instantaneous trip functions to protect feeders from overloads and faults. The feed‑through design includes line and load side lug terminals, enabling distribution from a primary panel to downstream circuits while maintaining protection at the point of use. The 3‑pole configuration ensures simultaneous protection of all three phase conductors, making it suitable for 480 VAC distribution in industrial and commercial power systems. Common applications include subfeed or distribution panel configurations in control panels or equipment enclosures, where a compact, protection‑rated breaker is required for medium‑duty feeders. With a 70 A rating and 18 kA at 480 V, it supports moderate‑sized feeders and aligns with Siemens ED‑frame compatibility for panel buses and accessory ecosystems. This model is used in retrofit and new installations where three‑phase protection for 480 VAC feeders is required.