The Siemens 3VA2040-8KP32-0AA0 is a SENTRON-series molded case circuit breaker (MCCB) in the 3VA2 platform, specified for line protection in distribution panels. Three poles, 40 A continuous current (Iu) held flat from 40 °C through 70 °C — no derate needed across the typical switchgear ambient range. The ETU850 electronic trip unit gives adjustable overload and short-circuit protection curves, with a communication function onboard for remote monitoring or integration into a higher-level control system.
Breaking capacity across voltage levels
Rated ultimate short-circuit breaking capacity (Icu) is 440 kA at 240 V AC, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. These figures place it in the high-interrupting category — suitable for installation close to large transformers or on high-fault-current busbars where standard 25–65 kA MCCBs would require series-rated coordination. The 800 V rated insulation voltage (Ui) confirms it can be applied in 480/277 V and 600 V systems without voltage derating concerns.
Physical fit and panel integration
Dimensions: 181 mm height, 105 mm width, 86 mm depth. The 105 mm width is standard for a 3-pole 3VA2 frame — fits the same panel cutout and busbar spacing as other 3VA2 breakers of this pole count. IP40 on the front face means it is protected against tools and small wires entering the mechanism but not against water ingress; install in an enclosure rated for the environment. An optional motor drive (listed as a product extension) allows remote open/close for automated transfer schemes.