What this MCCB delivers for the BOM line
The Siemens SENTRON 3VA2040-6KP42-0AA0 is a 4-pole molded case circuit breaker rated 40 A continuous at 40 °C through 70 °C — no derating needed across that span, which simplifies panel thermal budgeting. Its ETU850 electronic release provides line protection with communication capability, so the breaker reports status and trip events to the control system without a separate auxiliary module. Breaking capacity hits 242 kA at 240 V and 187 kA at 415 V, giving headroom for high-fault installations. The 800 V rated insulation voltage (Ui) supports 480 V and 600 V class systems with margin.
Panel fit and integration
Dimensions are 140 mm wide, 181 mm high, 86 mm deep — a standard SENTRON 3VA2 footprint that drops into existing switchboard cutouts and busbar systems. IP40 on the front face suits enclosed panel mounting; no washdown rating, so keep it behind a gland plate. Maximum power loss is 2.2 W, which keeps internal cabinet temperature rise negligible. Operating range from -25 °C to 70 °C covers most indoor industrial environments.