What this MCCB carries and where it fits
The Siemens 3VA1116-6GE42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated at 160 A continuous, in a 4-pole configuration, with a TM220 thermal-magnetic trip unit. The 220 kA breaking capacity at 240 V AC means it can interrupt very high fault currents at that voltage — useful for downstream of large transformers or in high-capacity distribution boards where available fault current is substantial. At 415 V the rating is still 154 kA, and it holds 75.6 kA at 440 V, so it handles industrial mains-level faults across common low-voltage networks. The 160 A rating is flat from 40 °C to 50 °C ambient; it derates to 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. That means in a warm panel — say 50 °C internal — you still get full 160 A. Above that, the derating curve is linear enough to plan around if your enclosure runs hot. Power loss at rated load is 38 W, which is modest for a 160 A frame and helps keep internal temperature rise manageable. Rated insulation voltage is 800 V, and the front face carries IP40 protection — fine for a panel-mounted breaker where the enclosure provides the overall IP rating. Dimensions are 130 mm height, 101.6 mm width, 70 mm depth, which fits the standard 3VA mounting footprint.
Trip unit and protection profile
The TM220 designation means a thermal-magnetic release with a fixed thermal pickup at 1.0× In (160 A) and a magnetic short-circuit pickup at 10× In (1600 A). This is a line-protection design — not a motor-protection breaker with adjustable overloads. It is sized for cable and busbar protection in distribution panels, not for direct motor starting duty where you would need an adjustable electronic trip or a motor-protection circuit breaker.
Panel integration notes
Mounts on a standard DIN rail or panel-mount plate via the 3VA base. The 101.6 mm width (4 inches) occupies four 25 mm pole spaces — typical for a 4-pole MCCB in a distribution board. Depth of 70 mm leaves clearance for rear busbar connections in most enclosures. No undervoltage release, no shunt trip, no communication module on this variant — it is a straight thermal-magnetic breaker with no auxiliary functions. Verify that your panel wiring scheme does not rely on a UVR or remote trip that this unit does not carry.