Siemens 3VA4120-6ED34 3 Pole Circuit Breaker

Siemens 3VA4120-6ED34 is a three-pole molded-case circuit breaker designed to protect three-phase electrical distribution systems from overloads and short circuits in industrial equipment and commercial power panels. It is built on the 3VA4 UL frame and carries a 20 A rated current with a maximum operating voltage of 480 V AC, making it suitable for standard 3‑phase circuits in many industrial settings. The device provides a 65 kA interrupting rating at 480 V and uses a thermal-magnetic TM210 trip unit to deliver In = 20 A overload protection, Ir = 20 A fixed short-circuit protection, and Ii = 15 × In (300 A) instantaneous protection, enabling reliable fault response. This configuration supports protective roles in motor feeders, distribution blocks, and control panels where precise overcurrent protection and fast fault clearing are required, while its compact 3VA4 frame allows easy integration into standard enclosures and existing power distribution layouts up to 480 V.