This is the line-protection version, meaning it's built for feeder and distribution duty, not motor or generator protection.
Breaking capacity — what it can interrupt
The breaker's interrupting capacity is rated at 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V.
Thermal derating — when it matters
Above that it derates: 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C.
Built-in undervoltage release
No auxiliary contact block is included (it's a 'without' variant).
That 76.2 mm width is a standard 3-pole MCCB footprint — three 25.4 mm pole centers. Front protection is IP40 (finger-safe, no water ingress). No communication function, no phase failure detection, no ground fault monitoring on this version.