Siemens ED43B020N Molded Case Circuit Breaker

Siemens ED43B020N Molded Case Circuit Breaker is a three‑pole, low‑voltage protection device from the Sentron ED frame, rated for 20 A on 480 V AC circuits. It employs a thermal‑magnetic trip unit that provides long‑time and instantaneous protection for three‑phase loads, with a listed interrupting capacity of 18 kA at 480 V. The ED43B020N variant is designed for 40 °C ambient operation and uses load‑side lug terminals for wiring connections, making it suitable for distribution panels and feeders in commercial or light industrial power systems. As part of Siemens’ ED‑Frame molded‑case breakers, it supports compact, coordinated overcurrent protection in 3‑phase 480 V networks and is intended to protect downstream equipment and circuits from overload and short circuits while fitting within standard ED‑frame mounting footprints.