The interrupting capacity steps down with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. At 415 V, the 121 kA rating covers high-capacity industrial feeds where the transformer impedance alone doesn't limit the fault.
Thermal derating and the TM220 release
Above that, derating is gradual: 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. If your panel ambient runs at 60 °C, you lose about 6% of the continuous rating — still within the margin for most 150 A feeder designs.
Panel fit and auxiliary contacts
The 3VA1116-5EE32-0AF0 measures 130 mm high, 76.2 mm wide, and 70 mm deep. The 76.2 mm width is a standard 3-pole MCCB footprint — it occupies three 25.4 mm (1-inch) module positions on a DIN rail or panel-mount base.
Endurance and mechanical life
That's the number of mechanical on-off cycles the mechanism is designed to survive under normal conditions. For a main feeder breaker that cycles once or twice a day, that's roughly 20 years of service. For a breaker that sees frequent switching — say, as a disconnect for a machine that cycles every hour — the endurance becomes a planning factor. The trip indicator gives a visual flag when the breaker has tripped on fault, which speeds troubleshooting on a multi-breaker panel.