What this MCCB delivers
The Siemens SENTRON 3VA2040-6KP46-0AA0 is a 4-pole molded case circuit breaker rated 40 A continuous (Iu) with an ETU850 electronic trip unit, built for line protection in distribution panels. Its interrupting ratings are the headline: 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V — meaning it can clear a fault at those levels without upstream fuses needing to open, which is what you want for high-fault-capacity switchboards or as a main breaker in a large MCC. The 40 A rating holds flat from 40 °C up to 70 °C, so no derating headache in a warm enclosure.
Trip unit and protection flexibility
The ETU850 electronic trip unit handles adjustable long-time, short-time, instantaneous, and ground-fault protection curves. Neutral conductor protection is adjustable from OFF to 40 % to 160 % of the phase rating.
Panel fit and integration
Dimensions: 181 mm high, 140 mm wide, 86 mm deep. Front IP40 protection. Rated insulation voltage Ui is 800 V; maximum operating voltage is 690 V AC. Power loss is 2.2 W.