What this MCCB does on the line
The Siemens SENTRON 3VA2010-6JQ42-0AA0 is a 4-pole molded case circuit breaker rated 100 A continuous, designed for line protection in distribution panels. It carries a 242 kA interrupting capacity at 240 V and 187 kA at 415 V, so it clears high-fault currents without upstream coordination issues on most commercial and industrial service entrances. The breaker holds its full 100 A rating across the entire ambient temperature range from 40 °C to 70 °C — no derating needed for a warm enclosure. That simplifies panel sizing when the MCCB sits near transformers or other heat sources. Ground-fault monitoring uses summation current formation on L + N conductors, so it detects leakage without a separate GFCI module. The communication function allows integration with building management or power monitoring systems over the SENTRON bus.
Sizing and selectivity notes
With an insulation voltage rating of 800 V and interrupting capacity that drops to 3 kA at 690 V, this MCCB is optimized for 240–500 V systems where the fault current is highest. The 121 kA at 500 V still covers most industrial motor control centers. On a 690 V line, the 3 kA rating limits it to low-fault applications or downstream of a current-limiting fuse. Power loss is 13.5 W maximum at rated current — negligible for thermal budgeting in a crowded panel, but worth noting if the breaker feeds a continuous process load where accumulated heat matters.
Physical fit and panel integration
Dimensions are 181 mm height, 140 mm width, 86 mm depth. The 140 mm width is standard for a 4-pole SENTRON 3VA frame, so it drops into existing panel cutouts without re-drilling. Depth of 86 mm leaves clearance for standard 200 mm deep enclosures with wiring gutters.