What this MCCB is and what it does
The Siemens 3VA2116-7JQ46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, with a continuous current of 160 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Four poles handle three-phase plus neutral, and the interrupting capacity hits 330 kA at 240 V, 242 kA at 415 V, and still holds 187 kA at 500 V. That kind of short-circuit rating means it can sit on high-fault panels without cascading upstream breakers — a real advantage in industrial switchboards where available fault current is stiff. It includes a ground-fault monitoring function using summation current formation on the L + N conductors, and a communication function for integration into a higher-level monitoring system. The insulation voltage is rated at 800 V, and maximum power loss is 25.5 W — useful to know for thermal management inside a sealed enclosure.
Dimensions and panel fit
The breaker measures 181 mm high, 140 mm wide, and 86 mm deep. That 86 mm depth is the key number for cabinet depth planning — it fits standard 200 mm deep enclosures with room for wiring gutters. Width of 140 mm means it occupies three 45 mm module spaces on a DIN rail, typical for a 4-pole MCCB in this class.