The Siemens 3VA1163-3GE42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker rated for line protection with a TM220 thermal-magnetic trip unit. Its breaking capacity class N delivers an Icu of 25 kA at 415 V — enough to handle moderate fault levels in industrial distribution panels without cascading upstream. The unit ships with a nut keeper kit for DC Power OEM applications in China, so verify the termination hardware matches your panel's busbar arrangement.
Overload and short-circuit settings
Overload protection (Ir) is adjustable from 44 A to 63 A via the TM220 dial, letting you match the breaker to the actual load current without swapping trip units. Short-circuit protection (Ii) is fixed at 10 x In (630 A), which is typical for thermal-magnetic breakers on motor or general distribution circuits — fast enough to clear bolted faults but coordinated downstream for selective tripping.