The Siemens SENTRON 3VA1140-3EE46-0AA0 is a 4-pole molded case circuit breaker (MCCB) designed for line protection, carrying a 40 A continuous rating at 40 °C ambient and a TM220 thermal-magnetic overcurrent release. Interrupting capacity is 75.6 kA at 240 V and 52.5 kA at 415 V — figures that tell you this breaker can clear high-fault currents on a 400 V distribution bus without upstream coordination issues.
Ratings that matter for panel fit
The 40 A rating holds across 40–50 °C (full rating), then derates to 39 A at 55–60 °C and 37 A at 70 °C — useful to know if the breaker sits near transformers or drives inside a sealed enclosure. Front protection is IP40 — fine for a clean panel interior; no washdown rating, so keep it out of wet process areas. Dimensions are 101.6 mm wide, 130 mm high, 70 mm deep — a 4-pole frame that fits standard Siemens 3VA panel footprints; verify busbar and lug spacing against your existing layout.