MCCB with electronic trip unit for line protection
The Siemens 3VA2140-7HK36-0AA0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection, with an ETU340 electronic overcurrent release. Rated 40 A continuous at 40 °C through 70 °C without derating, it carries a 3-pole design and an insulation voltage of 800 V. Interrupting capacity reaches 330 kA at 240 V, 242 kA at 415 V and 440 V, and 187 kA at 500 V — figures that place it in the high-fault-current class for industrial distribution. At 690 V the rating drops to 3.7 kA, so verify the available fault current at that voltage before specifying.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep. The width matches the standard 3-pole MCCB footprint on a DIN rail or bolted panel mount. Front IP40 protection keeps dust out of the enclosure face; the breaker itself is not rated for washdown environments. Maximum power dissipation is 1.6 W, so no special ventilation is needed in a standard IP40 enclosure. Operating temperature spans -25 °C to 70 °C; storage range extends from -40 °C to 80 °C.