What this MCCB carries and where it fits
The Siemens SENTRON 3VA2116-5KP32-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 160 A at 40 °C and a rated insulation voltage of 800 V. Its breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V — a steep drop at the top end that matters when the system voltage sits above 500 V. The ETU850 electronic trip unit provides adjustable protection curves and a communication function for integration into a monitored distribution system.
Thermal derating — the real continuous current at your panel ambient
The 160 A rating holds flat from 40 °C through 50 °C. Above that, the curve steps down: 154 A at 55 °C, 148 A at 60 °C, 142 A at 65 °C, and 136 A at 70 °C. If your enclosure runs at 60 °C — common in a packed, sealed panel — the usable current is 148 A, not 160 A. That 12 A gap can trip a borderline feeder. The maximum operating temperature is 70 °C; storage range is -40 °C to 80 °C.
Breaking capacity — selectivity headroom and the 690 V cliff
At 240 V the 187 kA rating gives substantial headroom for high-fault locations like a main service entrance or a large transformer secondary. At 415 V and 440 V the 121 kA figure still covers most industrial distribution. The drop to 79 kA at 500 V is still strong for a 160 A frame. The 4.25 kA at 690 V is the notable constraint — this is not the breaker for a 690 V motor feeder with a high fault current. For that application, a higher-frame or higher-voltage-rated MCCB is needed.
Dimensions and panel fit
The 3VA2116-5KP32-0HA0 measures 105 mm wide, 181 mm high, and 86 mm deep. The 105 mm width is the standard 3-pole SENTRON 3VA2 frame footprint — it fits the same mounting pattern as other breakers in the series. Verify the depth clearance against your enclosure door and busbar stack; 86 mm is moderate for an MCCB with an electronic trip unit.
Power loss and auxiliary release
Maximum power loss is 25.5 W — relevant for thermal budgeting in a sealed enclosure. The shunt trip (STL) is built in; no separate undervoltage release is fitted. There is no auxiliary contact version, no ground-fault monitoring, and no phase-failure detection on this variant. The trip indicator is also absent, so remote status relies on the communication function.