What this MCCB carries and where it fits
The Siemens SENTRON 3VA2140-7MN36-0AA0 is a 3-pole molded case circuit breaker rated 40 A continuous at 40 °C through 70 °C — no derating needed across that range, which simplifies panel sizing in warm enclosures. It is designed for motor protection, with adjustable trip class settings of 10A, 10E, and 20E, letting you match the overload curve to the motor's starting profile. The interrupting capacity reaches 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — a wide SCCR envelope that supports high-fault installations without cascading upstream.
Integration into the panel
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard SENTRON 3VA2 footprint that fits existing DIN-rail or screw-mount layouts. The 86 mm depth leaves room for wiring channels behind the breaker in a 200 mm deep enclosure. No undervoltage release or shunt trip is built in (the listing shows no voltage trigger and no undervoltage release), so if you need remote trip, plan for an external accessory. Phase failure detection is included, which is useful for motor circuits where a lost phase can cause single-phasing damage.
Electrical and environmental limits
Rated insulation voltage is 800 V. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 1.6 W — negligible for thermal budgeting in a multi-breaker panel. No ground-fault monitoring version, no communication function, and no trip indicator on the front face. The breaker is designed for motor protection, not as a main disconnect for general distribution.