630 A MCCB, 3-Pole, 187 kA at 240 V
The Siemens SENTRON 3VA2463-5JQ32-0AB0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, designed for line protection in industrial distribution panels. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415/440 V, dropping to 9 kA at 690 V — so the SCCR headroom at typical 400 V class panels is solid for most downstream fault scenarios. Dimensions are 248 mm high, 138 mm wide, 110 mm deep — fits standard SENTRON 3VA mounting footprints. The basic switch variant is 3VA2463-5JQ32-0AA0, and this order code adds communication capability.
Temperature Derating and Power Loss
Rated 630 A at 40 °C ambient; derate linearly to 450 A at 70 °C. That 180 A drop across the range matters if the breaker sits in a hot enclosure near transformers or drives — plan your thermal budget accordingly. Maximum power loss is 162 W at full load.