What the 100 A rating and TM210 trip unit mean for your panel
The Siemens SENTRON 3VA1010-2ED32-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 100 A at 40 °C, with no derating needed up to 50 °C — it holds the full 100 A at 50 °C. Above that, the thermal curve steps down: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. This matters for a panel that runs warm; you don't lose headroom until the ambient passes 50 °C. The TM210 overcurrent release is a fixed thermal-magnetic trip — no electronic adjustment, no communication function, no voltage trigger, and no phase-failure detection. It's a straight line-protection device for standard feeder or distribution duty where you don't need selectivity tuning or remote monitoring.
Breaking capacity — the voltage-dependent curve
Breaking capacity varies sharply with system voltage: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V. For a 480 V panel (common in North America) the relevant figure is the 415 V or 440 V rating — expect around 32 to 13.6 kA depending on your exact line voltage. That's adequate for most secondary distribution but not for high-fault utility entrance positions.