What this MCCB is and where it fits
The Siemens 3VA2116-4JQ32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous current across a 3-pole configuration. It's designed for line protection — the primary feeder or main distribution breaker in a panel — and carries a communication function for integration into a monitored power system.
Interrupting capacity — what the ratings mean for coordination
At 240 V this breaker interrupts 121 kA; at 415 V and 440 V it holds 75.6 kA; at 500 V it's 52.5 kA; at 690 V it drops to 3.7 kA. That 121 kA figure at 240 V puts it in the high-interrupting category for a 160 A frame — it can sit upstream of lower-rated branch breakers without cascading failure, as long as the available fault current at its terminals stays under those numbers. The 800 V rated insulation voltage (Ui) confirms it's built for 690 V systems with margin.
Thermal performance — flat-rated across the panel ambient range
The 160 A rating holds steady from 40 °C all the way to 70 °C ambient — no derating curve to chase in a warm enclosure. Operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Maximum power loss is 25.5 W, which matters for heat load calculations in a sealed cabinet.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard MCCB footprint for a 160 A frame. Mounts on a DIN rail or panel-mount baseplate. The 3-pole design with communication module occupies the same slot as a non-communicating 3VA2 of the same frame size, so a panel layout that accommodates the 105 mm width will accept this unit.