Breaking capacity hits 121 kA at 240 V AC and holds 75.6 kA at 415 V — enough headroom to clear high-fault conditions without cascading upstream breakers. This unit includes an undervoltage release (UVR) — the auxiliary release type is clearly marked as undervoltage release. That means if the control voltage drops, the breaker trips immediately. No communication module onboard — this is a straight hardwired breaker.
Thermal derating — what the curve tells you
At 70 °C ambient — the maximum operating temperature — it still carries 30 A. That's a shallow derating slope, meaning the breaker doesn't lose much capacity in warm enclosures.
Breaking capacity by voltage — selectivity planning
At 240 V: 121 kA. At 440 V: 52.5 kA.