What this MCCB is and what it does
The Siemens 3VA2216-5MN32-0KH0 is a SENTRON molded case circuit breaker (MCCB) built specifically for motor protection — that's the product version, not a generic feeder breaker. Rated continuous current Iu is 160 A, and it carries an ETU350M electronic trip unit with phase failure detection built in. The 3-pole body breaks up to 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — so it handles high-fault industrial services without cascading upstream. The auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ type), and the integrated shunt trip (STL) release lets you remotely trip the breaker — useful for emergency-stop circuits or supervisory control. The base switch is order code 3VA2216-5MN32-0AA0; the auxiliary trip module is 3VA9688-0BL33.
Current derating — what the temperature table tells you
This MCCB holds its full 160 A rating from 40 °C through 50 °C. At 55 °C it derates to 153.6 A, at 60 °C to 150.4 A, at 65 °C to 147.2 A, and at 70 °C to 144 A. If your panel ambient runs hot — say, a sealed enclosure next to a furnace line — you need to size the breaker for the derated value, not the nameplate 160 A. The maximum operating temperature is 70 °C; storage range is -40 °C to 80 °C.
Panel fit — dimensions and integration
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width is the standard SENTRON 3VA2 frame footprint — it fits the same DIN-rail or screw-mount panel cutout as other 160 A SENTRON MCCBs. No surprises if you're swapping a 3VA2 variant; the bus-bar and lug kits carry over.