The Siemens 3VA1096-4ED42-0AA0-ZD00 is a 4-pole IEC frame 100 molded case circuit breaker from the 3VA1 series, rated for line protection with a TM210 thermal-magnetic trip unit. Its breaking capacity class S delivers an Icu of 36 kA at 415 V AC — sufficient for most industrial distribution panels where the prospective fault current stays under that threshold. The fixed overload protection is set at Ir = 16 A, and the short-circuit pickup is fixed at Ii = 20 × In (320 A), so there is no adjustment range on either; what you order is what protects the circuit. The neutral conductor is unprotected on this variant, and the unit includes a nut keeper kit specified for DC Power OEM builds in China.
What the Ratings Mean for Fit
The Icu = 36 kA @ 415 V is the maximum short-circuit current the breaker can interrupt once without needing replacement — per IEC 60947-2, that is the ultimate breaking capacity. For a panel with a calculated fault current of, say, 25 kA at the bus, this breaker has margin. The Ii = 20 × In (320 A) magnetic pickup means it will trip instantaneously on a short-circuit above that level; for motor-starting inrush or transformer energization, verify that the peak transient does not exceed 320 A, or you risk nuisance trips. The fixed Ir = 16 A overload setting suits a continuous load drawing up to 16 A — no dial to turn, so the load current must be known and stable.