Breaking capacity is voltage-dependent: 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V.
The breaker is rated 160 A at 40 °C, 45 °C, and 50 °C without derating, then steps down: 156 A at 55 °C, 151 A at 60 °C, 147 A at 65 °C, and 142 A at 70 °C. For a panel running at 60 °C ambient, the continuous current capability is 151 A — still above the 80 A rating of this specific unit, so no practical derating concern at the nameplate current. Dimensions: 140 mm wide, 158 mm high, 70 mm deep. The 4-pole width is standard for a 160 A frame MCCB — check the existing panel cutout or DIN-rail spacing if retrofitting. The supplied basic switch order code is 3VA12166FF420AA0, which is the base breaker without the UVR; this variant adds the undervoltage release module.
Power loss and environmental limits
Maximum power loss is 35.5 W at rated current. This is dissipated as heat inside the enclosure — factor it into the panel thermal budget, especially in a sealed cabinet with multiple breakers. The storage lower limit is relevant for unheated warehouses in cold climates; the breaker can be stored at -40 °C but must be warmed above -25 °C before energizing.
The lifecycle stage is listed as current — meaning Siemens still manufactures this order code as an active catalog item.