What this MCCB is and what the ratings mean for fit
The Siemens 3VA2116-5JQ32-0AJ0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. Its 160 A full-scale rating holds steady across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel layout in warm enclosures. The 3-pole construction and interrupting ratings of 187 kA at 240 V and 121 kA at 415 V mean it can clear high-fault currents on the line side without upstream coordination issues. The communication function (likely via the 3VA COM module) allows remote monitoring and trip-event logging, useful for a managed power distribution scheme.
Physical footprint and panel integration
At 105 mm wide, 181 mm tall, and 86 mm deep, this MCCB fits standard SENTRON 3VA mounting footprints. The depth is the dimension that matters for gland-plate clearance and busbar reach — 86 mm (3.39 in) is shallow enough for most 600 mm deep enclosures. The auxiliary switch configuration (2 auxiliary switches + 1 trip alarm switch HP) provides status feedback without adding external relays.