What this MCCB is and what it does
The Siemens 3VA1196-6EF32-0AA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection — the primary feeder or downstream branch in a distribution panel. It carries a 16 A continuous rating at 40 °C (derated to 15 A at 60 °C and above) across three poles, with a TM240 thermal-magnetic overcurrent release. The TM240 designation means the thermal trip element is fixed at 16 A; the magnetic short-circuit pickup is set at 240 A (15× In). That's a deliberate coordination choice — high inrush loads like motor starters or transformer primaries won't nuisance trip on magnetizing current, but a bolted fault clears decisively. Breaking capacity is the headline number here: 220 kA at 240 V AC, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. Those are among the highest interrupting ratings in the 16 A frame class — this breaker is built for high-fault installations where the available short-circuit current at the panelboard exceeds what a standard MCCB can handle. The 220 kA figure at 240 V means it can safely interrupt a fault of that magnitude without venting or welding contacts, which is the difference between a coordinated trip and a cascading arc flash event upstream.
Physical fit and panel integration
Footprint: 76.2 mm wide (3 in), 130 mm tall (5.12 in), 70 mm deep (2.76 in). That's a standard SENTRON 3VA frame size — it occupies one 76 mm DIN cutout in a panel or enclosure. The front face carries IP40 protection, so it's suitable for general-purpose indoor panels where tools or fingers won't contact live parts. No undervoltage release, no trip indicator flag, no communication module on this variant — it's a straight thermal-magnetic breaker with no auxiliary signaling. If you need remote trip indication or undervoltage protection, you'd step to a different 3VA option code. Power dissipation is 10.6 W maximum at rated load. In a densely packed panel, that heat needs to be accounted for in the thermal budget — especially if multiple breakers are ganged in a row with no forced ventilation. The operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
What the ratings mean for your decision
The 220 kA SCCR at 240 V is the spec that governs where this breaker goes. In a 480 V panel, the interrupting capacity drops to 154 kA at 415 V and 121 kA at 440 V — still very high, but you need to verify the available fault current at the installation point. At 690 V it's 17 kA, which is adequate for most 690 V distribution but not for high-fault 690 V switchgear. The TM240 release (240 A magnetic pickup) means this breaker will ride through motor starting currents up to about 15× rated current — a standard 16 A MCCB with a 10× pickup might trip on a large motor's inrush; this one won't. Rated insulation voltage is 800 V, so the breaker is fully rated for 690 V systems with margin. The 16 A continuous current is stable across 40 °C to 55 °C (no derating needed in that band); above 55 °C it derates to 15 A. If your panel ambient runs hot — say 60 °C inside the enclosure — you lose 1 A of headroom. Plan the load accordingly.