What this MCCB is and where it lands
The Siemens SENTRON 3VA1340-6FF42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated 200 A continuous, designed for line protection in distribution panels and industrial switchboards. It belongs to the 3VA series, the current-generation MCCB platform from Siemens, and carries a TM240 thermal-magnetic fixed-trip overcurrent release — meaning the thermal pickup and magnetic trip thresholds are factory-set for the 200 A frame, not field-adjustable.
Breaking capacity — the real fit number
Rated interrupting capacity varies sharply with system voltage: 220 kA at 240 V, 154 kA at 415 V and 440 V, 121 kA at 500 V, and 17 kA at 690 V. For a 480 V distribution panel, the 154 kA figure at 440 V is the closest published benchmark. That level of interrupting capacity puts this breaker in the high-fault-current tier — sized for main or large-feeder positions where available fault current exceeds 100 kA. The 17 kA at 690 V is notably lower; if the application is 690 V, confirm the available fault current stays under that ceiling.
Thermal derating — what the 200 A rating actually delivers
The breaker carries its full 200 A rating from 40 °C through 50 °C ambient. Above that, the continuous current must be derated: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. If the panel interior runs hot — common in compact, high-density switchboards — use the 55 °C or 60 °C column for sizing. The 92.1 W maximum power loss at rated load matters for enclosure thermal calculations, especially in sealed or IP-rated cabinets.
Mounting and integration
Dimensions are 248 mm high, 184 mm wide, 110 mm deep. The 184 mm width is the standard 4-pole MCCB footprint for the 3VA frame — fits existing Siemens panel cutouts and bus-bar centers. Front-face protection class is IP40, meaning tools and fingers are kept out but the unit is not sealed against water ingress; install in a suitable enclosure for wet or washdown environments. No undervoltage release, no shunt trip, and no communication function on this variant — it is a straight thermal-magnetic breaker with no auxiliary electronics.