What this MCCB delivers on the line side
The Siemens 3VA1112-3FD46-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for 62 A continuous — the TM210 thermal-magnetic release handles overloads and short-circuits in a single compact package. This is a line-protection design (not a motor-protection or ground-fault variant), so it lives on the feeder or distribution side of the panel, sized for the full-load ampacity of the downstream bus. Breaking capacity climbs with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and holds 11.9 kA at both 500 V and 690 V. That curve tells the selectivity story — at 415 V the 52.5 kA SCCR gives headroom for most industrial distribution panels without cascading upstream. At 690 V the 11.9 kA figure still clears a fault in a 480 V corner-grounded delta or a 600 V class installation. Thermal derating is published per the datasheet: 125 A frame rating holds flat from 40 °C through 50 °C, then drops to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. If the panel ambient runs hot — say a sealed enclosure near a furnace line — the 62 A trip setting stays within the derated curve, but the frame headroom means the breaker isn't breathing hard.
Where it fits in the panel
Dimensions: 130 mm height, 101.6 mm width, 70 mm depth. The 4-pole width (101.6 mm) is the standard 4-module footprint for the 3VA platform — it clips onto the mounting plate or DIN rail and occupies the same horizontal space as the 3VA1110 and 3VA1112 siblings. Front-face protection is IP40, meaning tools and fingers are kept out, but the enclosure still needs its own IP rating for washdown or dust environments. No undervoltage release, no shunt trip, no communication module, no ground-fault monitoring — this is a straight thermal-magnetic breaker. If the BOM calls for remote tripping or earth-leakage, you step up to the 3VA1 with the appropriate accessory slot or the 3VA2 electronic-trip family.