What the breaking capacities mean for your panel
The 3VA2140-5HM46-0AA0 is a Siemens SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current with an ETU330 electronic trip unit. Its 187 kA interrupting capacity at 240 V and 121 kA at 415 V mean it can safely clear high-fault currents in low-voltage distribution — typical for large transformer-fed switchboards or industrial main feeders where available fault current exceeds 100 kA. At 690 V the rating drops to 3.8 kA, so it is not a primary choice for 690 V high-fault panels.
Physical fit and panel integration
The breaker measures 86 mm deep, 140 mm wide, and 181 mm high. It is a 4-pole unit designed for DIN-rail or screw-mount installation in a distribution board or enclosure. The IP40 front protection means it is suitable for indoor panel use where no water spray is present.
Trip unit and protection features
The ETU330 electronic trip unit provides adjustable long-time (tr) from 0.5 to 17 s, and supports ground-fault monitoring via summation current on L+N. N-conductor protection is adjustable OFF or 100%. Rated insulation voltage is 800 V. No communication function is built in.