What the 100 A rating means for your panel
Above 50 °C the curve steps down: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. The ETU350 gives you adjustable thermal and magnetic pickup settings via the front dials — not a fixed thermal bimetal, so you can fine-tune coordination downstream without swapping the breaker body. Rated insulation voltage Ui is 800 V, and the interrupting ratings climb steeply at lower voltages: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4 kA at 690 V (–). It will hold coordination with upstream gear under most plant fault scenarios.
Standard DIN-rail or screw-mount backplate. The auxiliary contact configuration is 1 auxiliary switch + 1 trip alarm switch (HP type), which gives you one N/O or N/C signal for status and a separate alarm contact that closes only on a trip event. That alarm contact is useful for a remote annunciator or PLC input to flag a faulted breaker without polling the main trip coil. Maximum power loss is 13.5 W.