The Siemens 3VA1140-5ED22-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries a continuous current Iu of 40 A at ambient temperatures up to 50 °C, with only a 1 A derating to 39 A at 55 °C and 37 A at 70 °C — so it holds up to the steam near a tire-curing press without losing headroom. The 2-pole configuration and TM210 thermal-magnetic release provide LI (long-time and instantaneous) protection, with a fixed instantaneous pickup at 400 A.
Breaking capacity and selectivity
The interrupting rating is 187 kA at 240 V and 121 kA at 415 V — figures that give substantial SCCR headroom for fault-current coordination downstream. For a data center or industrial feeder, that means you can place this breaker close to the transformer secondary without worrying about cascading failure into upstream gear. The rated insulation voltage Ui is 500 V, and the maximum rated operational voltage for DC circuits is 250 V.
Physical fit and panel integration
The 3VA1140-5ED22-0AA0 measures 70 mm deep, 50.8 mm wide, and 130 mm tall — a compact 2-pole footprint that fits standard DIN-rail or panel-mount enclosures. Front-face protection is IP40, meaning tools or fingers won't accidentally contact live parts during commissioning. Power loss is 7.2 W maximum, so thermal rise inside a sealed panel stays manageable without forced ventilation.