160 A MCCB with ground-fault monitoring — line protection for distribution panels
The Siemens 3VA2116-7KQ42-0AA0 is a SENTRON 4-pole molded case circuit breaker rated for 160 A continuous current across the full -25 °C to 70 °C operating range — no derating needed up to 70 °C ambient. It's designed for line protection in main distribution panels, with a breaking capacity of 330 kA at 240 V AC and 242 kA at 415/440 V, dropping to 187 kA at 500 V and 3.7 kA at 690 V. The 800 V rated insulation voltage gives headroom for 480/600 V systems. Ground-fault monitoring uses summation current formation on L+N conductors, and the breaker includes a communication function for integration into higher-level monitoring.
Breaking capacity and selectivity planning
At 240 V the 330 kA interrupting rating covers high-fault utility feeds; at 415/440 V the 242 kA still handles most industrial transformer secondaries. The steep drop to 3.7 kA at 690 V means this breaker is not intended for 690 V main service — it's a 480/600 V class device. The 160 A frame is the same physical platform as the 3VA2163-8JQ32-0AA0 (250 A frame), but this unit ships with a 160 A electronic trip unit. If your load calc lands between 160 and 250 A, the 3VA2163 sibling is the correct choice; below 160 A this breaker gives you the full 160 A continuous without derating.
Panel integration and wiring
The breaker measures 181 mm high, 140 mm wide, and 86 mm deep — a 4-pole frame that fits standard Siemens SENTRON mounting bases. Wire terminations accept the full 160 A rated conductors; the 25.5 W maximum power loss at rated current should be factored into enclosure thermal calculations. The communication function (likely PROFIBUS or PROFINET via a communication module) allows remote trip indication and load monitoring, but the trip indicator is not built into this variant — rely on the communication interface or an external auxiliary contact for status feedback.