What this 500 A MCCB delivers
The Siemens 3VA1450-6EF42-0AA0 is a SENTRON molded case circuit breaker rated for 500 A continuous at 40 °C, with a TM240 thermal-magnetic overcurrent release. Its 4-pole construction and 220 kA interrupting capacity at 240 V make it a fit for high-fault main feeders or distribution panels where upstream coordination demands a high withstand rating. Rated insulation voltage is 800 V, and the breaker carries a 122.7 W maximum power loss at full load — a figure to factor into enclosure thermal management if the panel is tightly packed.
Interrupting rating drops as system voltage rises: 220 kA at 240 V, 154 kA at 415 V and 440 V, 121 kA at 500 V, and 17 kA at 690 V.
The 500 A rating holds from 40 °C through 50 °C. Above that it derates linearly: 488 A at 55 °C, 476 A at 60 °C, 464 A at 65 °C, and 452 A at 70 °C. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Dimensions are 248 mm high, 184 mm wide, and 110 mm deep. The 4-pole form factor mounts in standard MCCB panel cutouts; verify the existing bus-bar spacing and lug kit compatibility before committing the BOM line.