What this MCCB does on the line
The Siemens SENTRON 3VA1196-4EF32-0KH0 is a 3-pole molded case circuit breaker rated for line protection, meaning it sits upstream of a feeder or distribution panel and clears faults before branch devices see them. The interrupting capacity is the headline number here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — so at 415 V it handles a 75.6 kA fault without needing a current-limiting fuse upstream. That's the kind of SCCR headroom a site electrical engineer looks for when the transformer is big and the fault current is high. Rated continuous current Iu is 16 A, and it holds that rating from 40 °C up to 50 °C without derating. At 55 °C it drops to 15.36 A, at 60 °C to 15.04 A, at 65 °C to 14.72 A, and at 70 °C to 14.4 A. If the panel ambient runs hot — say a sealed enclosure near a furnace line — you need to account for that 14.4 A floor at 70 °C. The TM240 thermal-magnetic release handles the overload and short-circuit trip curves; there's no electronic adjustment, so what you see on the nameplate is what you get.
Mounting and integration into a panel
The 3VA1196-4EF32-0KH0 bolts into a panel — it's not a DIN-rail snap-on. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth. That 76.2 mm width is three pole spaces wide on a standard 25 mm grid, so it fits a typical MCC bucket or distribution panel cutout. The front face carries an IP40 protection rating, which is fine for a dry indoor enclosure but not for washdown areas. Auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ version). That gives you two form-C contacts for status feedback and a dedicated alarm contact that changes state only on a trip event — useful for a PLC input that logs faults separately from run status. The integrated shunt trip (STL) is included, so you can remotely trip the breaker via a control voltage; the auxiliary trip module order code is 3VA9688-0BL33 if you need a replacement. No undervoltage release, no communication module, no ground fault monitoring — this is a bare-bones line-protection MCCB with a shunt trip.