The Siemens 3VA1110-4EF32-0DH0 is a 3-pole SENTRON molded case circuit breaker rated for 100 A continuous current (Iu) across the 40 °C to 50 °C band — it holds that full 100 A without derating up to 50 °C ambient, then tapers to 90 A at 70 °C. That thermal curve means you can size the breaker for a 100 A feeder in a ventilated enclosure and still have headroom if the ambient climbs to 50 °C. The interrupting ratings are the real story here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V.
TM240 release and undervoltage trip — what drives the trip curve
The 240 designation refers to the release frame, not the continuous rating; the breaker itself is set for 100 A continuous. An undervoltage release (UVR) is integrated as standard, wired to the auxiliary trip accessory listed as 3VA9608-0BB25. No communication function, no phase-failure detection, no ground-fault monitoring — this is a straight line-protection breaker, not a multifunction power monitor.
Panel fit — dimensions and mounting
The breaker measures 130 mm high, 76.2 mm wide (3-pole width — standard 3-module DIN footprint), and 70 mm deep. The 76.2 mm width matches the 3VA1110 frame across the 3VA family, so a panel laid out for a 3VA1112-5EF32-0CA0 (which is a 125 A frame, different release) shares the same mounting footprint — the 3VA1110-4EF32-0DH0 drops into the same DIN slots without rewiring the bus bars, provided the continuous current and interrupting ratings match the application.