What this MCCB carries
The Siemens SENTRON 3VA2140-8KQ36-0AA0 is a 3-pole molded case circuit breaker rated for 40 A continuous current, with an adjustable thermal-magnetic trip range from 60 A minimum to 480 A maximum. Breaking capacity runs 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — numbers that tell you this breaker handles high-fault panels without cascading upstream. Rated insulation voltage is 800 V, and the unit holds its 40 A rating across the full operating temperature range from -25 °C to 70 °C — no derating curve to chase.
Panel fit and integration
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — standard 3-pole MCCB footprint for DIN-rail or panel-mount enclosures. This is a line-protection design with built-in ground-fault monitoring using summation current formation on the L-conductor. A communication function is onboard, so it can talk to a higher-level system for metering or status — useful for a panel that needs remote trip indication or load monitoring. Max power loss is 1.2 W, which keeps heat inside a crowded enclosure manageable.
Lifecycle and sourcing posture
The lifecycle stage is marked current, meaning this is an active, in-production catalog item — no phase-out notice, no last-time-buy clock.