What this MCCB is and where it lands
The Siemens 3VA2116-6HM32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous current across the full operating temperature range of -25 °C to 70 °C — no derating needed up to that ceiling. Three poles, line-protection design, no undervoltage release or communication function onboard. This is the version you spec when you need a straight thermal-magnetic or electronic-trip MCCB for a distribution panel, motor control center, or feeder circuit, and you want the high interrupting capacity that the 3VA2 frame carries.
Breaking capacity — what the voltage-dependent numbers mean for coordination
This breaker delivers 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V is the figure that governs its use on high-fault-capacity 240 V distribution — think large transformer secondaries or industrial services where available fault current exceeds 100 kA. The sharp drop to 3.7 kA at 690 V means this is not a 690 V main breaker; it is a 240–500 V device with a 690 V rating that covers incidental or lightly-faulted circuits only. For selectivity studies, the 187 kA at 415 V is the number to coordinate against downstream breakers in a 400 V panel.
Panel fit and thermal budget
Footprint is 105 mm wide × 181 mm tall × 86 mm deep — a standard 3VA2 frame size that drops into existing SENTRON mounting bases and busbar systems without re-drilling. Maximum power loss is 25.5 W; factor that into enclosure heat rise calculations if the panel is densely populated. The 160 A rating holds flat from 40 °C through 70 °C, so no derating curve to apply in a warm enclosure — useful when the breaker sits above a row of contactors or drives.
Ground-fault monitoring version
This variant is configured for summation-current ground-fault monitoring on the L-conductor — meaning it uses a summation CT around the phase conductors to detect residual current. That is the standard approach for solidly-grounded systems where you want ground-fault protection without a separate GF relay. The 3VA2116-6HM32-0AA0 does not include a trip indicator or voltage trigger, so ground-fault events will not leave a visible flag on the breaker face; plan for an external indication if the application requires it.