That 100 A holds flat through 50 °C — you only start derating at 55 °C (96 A), dropping to 90 A at 70 °C. For a 100 A feeder in a warm enclosure, that means no unnecessary upsizing unless ambient pushes past 50 °C. Breaking capacity is the headline number here: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. At 690 V the 17 kA is modest; verify your available fault current if feeding a 690 V motor control center.
The 3VA1110-5EE32-0AB0 measures 76.2 mm wide, 130 mm tall, and 70 mm deep. The 70 mm depth leaves room behind the door for wiring gutters or busbar connections. If you need remote trip or status feedback beyond the aux contacts, you'll add those as separate accessories. The TM220 release is fixed thermal-magnetic — no electronic adjustment curves.