Its breaking capacity reaches 121 kA at 240 V AC and 75.6 kA at 415 V AC, which means it can safely interrupt high fault currents without cascading upstream — a key requirement for main switchboard or feeder applications where SCCR coordination matters.
Breaking Capacity and Current Derating
The breaking capacity drops with system voltage: 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V — so for a 480 V or 600 V panel, the available fault current must be checked against the lower curve. The continuous current holds at 160 A up to 50 °C ambient, then derates to 156 A at 55 °C, 151 A at 60 °C, 147 A at 65 °C, and 142 A at 70 °C. If the panel runs hot (say 55 °C inside), the breaker still delivers 156 A — enough for most 150 A feeder loads without upsizing.
Built-in Auxiliaries and Undervoltage Release
The basic switch assembly is order code 3VA12164EF320AA0. No ground-fault monitoring or communication function is included; this is a straightforward line-protection breaker for hardwired panels.
Mounting is via the integral DIN-rail or screw-mount base (typical for this frame size).