What this 3VA1 breaker is and what the ratings mean
The Siemens 3VA1163-4ED42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker with a 63 A TM210 thermal-magnetic trip unit. The 'S' breaking capacity class delivers 36 kA Icu at 415 V — enough for most industrial distribution panels downstream of a larger transformer or main breaker. The 36 kA rating means it safely interrupts a fault current up to that level without welding contacts or cascading failure upstream, which is the key coordination figure for a panel builder sizing selective tripping. The TM210 trip provides fixed overload protection at Ir = 63 A and fixed short-circuit pickup at Ii = 10 × In (630 A). That fixed Ii is a deliberate choice: no adjustment dial to mis-set, but it also means the magnetic trip threshold is locked at 630 A, so verify your downstream cable and load inrush won't cause nuisance trips on motor starting or transformer energization. This variant includes a nut keeper kit and is flagged as a DC Power OEM build for China — the neutral conductor is unprotected (N conductor unprotected), so the breaker switches all four poles but the neutral pole has no overload or short-circuit protection element. That is standard for a 3-pole + switched-neutral configuration used in some DC distribution or IT grounding schemes.
Where it fits in the panel
The 3VA1 frame 160 mounts on a standard DIN rail or can be screw-fixed to a backplate in a distribution board or motor control center. Four-pole width means it occupies 4 module spaces — plan your enclosure fill factor accordingly. The nut keeper kit simplifies captive hardware handling during panel assembly, which is a small but real time-saver on repetitive builds.