The Siemens 3VA1116-5EE32-0KH0 is a 3-pole SENTRON molded case circuit breaker rated for a continuous current of 160 A at up to 50 °C, with a TM220 thermal-magnetic overcurrent release. The line protection variant (no ground fault monitoring, no communication module) keeps it a straightforward main or feeder breaker for motor control centers or switchboards. Dimensions are 130 mm high, 76.2 mm wide, and 70 mm deep — a compact footprint for a 160 A frame.
Above that, derating begins: 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. For a panel builder stuffing this into a warm enclosure, the 55 °C derating is the first inflection point to budget for.
What the TM220 release means for selection
The TM220 designation indicates a thermal-magnetic release with a fixed thermal pickup at 160 A (the frame rating) and an adjustable magnetic short-circuit pickup. For line protection duty, this breaker is sized to protect cable and busbar against overload and short-circuit, not a specific motor load — no phase failure detection or undervoltage release is fitted.