At 690 V the breaking capacity drops to 17 kA — still adequate for most 690 V motor circuits, but worth checking against the transformer rating.
This breaker is rated 100 A continuously up to 50 °C ambient. Above that it derates: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. The maximum power loss is 75 W, which adds to the enclosure heat load and should be factored into the thermal design.
Trip unit and auxiliary contacts
The overcurrent release is the ETU350M, an electronic trip unit with phase failure detection — it will trip on loss of a phase, which is critical for motor protection where single-phasing can burn out a winding. There is no undervoltage release, no ground fault monitoring, and no communication function built in; those would need add-on modules.
Panel fit and mechanicals
The latching endurance is rated at 20 000 operations, which is typical for a motor-protection MCCB in a panel that sees regular switching.