Its thermal-magnetic trip unit is adjustable between 600 A and 4 000 A, giving the specifying engineer flexibility to match cable and load protection curves without swapping the breaker frame. Breaking capacity is the headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. That kind of interrupting rating means this breaker can sit at the main or a high-fault subfeed without cascading upstream. Thermal derating is published across the full operating range: full 400 A up to 50 °C, then 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. For a panel pulling near the nameplate in a non-air-conditioned electrical room, that derating curve is the real-world limit — size the load side accordingly.
Auxiliaries and releases
That covers remote status feedback and alarm annunciation without needing an add-on module. No undervoltage release is fitted; if UVR is required for your safety circuit, this is not the order code.
The 138 mm width is the 3-pole frame footprint — standard for SENTRON 3VA2 breakers in this rating class. Panel cutout and bus-bar spacing should match the existing 3VA2 layout if replacing a like-frame unit. The 70 °C operating ceiling matches the derating curve's top end — the breaker can live in a hot enclosure as long as load current is backed off per the published numbers.