Rated and Locked: 3VA1180-6GE42-0AA0-ZD00
The Siemens 3VA1180-6GE42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker with a breaking capacity class H rating of Icu=70kA at 415 V. That 70 kA interrupting rating means it can clear a bolted fault up to that level without the arc re-striking or the case rupturing — no exceptions. The TM220 thermal-magnetic trip unit gives you overload protection adjustable from Ir=56 A to 80 A, and a fixed short-circuit pickup of Ii=10 x In. If you're specifying this into a panel, the 100% N-conductor protection and the nut keeper kit for DC Power OEM in China are part of the build; verify the keeper kit matches your bus-bar stack-up before the BOM locks.
What the Ratings Mean for Fit
The 70 kA Icu at 415 V is the maximum short-circuit current the breaker can safely interrupt once. In a panel with a transformer-fed fault current of, say, 50 kA, this breaker holds — but if the available fault current exceeds 70 kA, you need a current-limiting upstream device or a higher-class frame. The TM220 thermal-magnetic trip provides inverse-time overload protection (the thermal element) and instantaneous magnetic trip at 10 x In (800 A for the 80 A rating). That 10 x In pickup is typical for motor branch circuits where you need to ride through inrush without nuisance tripping. The adjustable Ir (56 A to 80 A) lets you fine-tune the continuous current rating to the actual load, which is useful when the connected load is less than the breaker's In.