The Siemens SENTRON 3VA2010-6HL32-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. The 242 kA breaking capacity at 240 V AC is the headline number, but the real-world fit is the 187 kA it still delivers at 415 V and 440 V — that's the range where most industrial switchgear lives.
That's unusual — most MCCBs start derating above 40 °C. Breaking capacity: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, 3 kA at 690 V. The 3 kA at 690 V means this is not the breaker for a 690 V main; use it on the secondary side of a 690/400 V transformer. The UVR means the breaker drops out if the control voltage falls below a threshold — useful for safety circuits where loss of control power should open the main feed. The trip alarm switch gives a separate signal when the breaker trips on fault, not just when manually opened.
Where it goes in a panel
The 181 mm height is tall enough that adjacent breakers need the matching SENTRON busbar system for phase spacing.