What this MCCB carries and where it lands
The Siemens 3VA1110-6EF36-0HH0 is a SENTRON molded case circuit breaker rated for line protection in distribution panels. Three poles, 100 A continuous at 40 °C, and a 220 kA interrupting capacity at 240 V AC — that SCCR covers most utility transformer secondaries and industrial service entrances without needing a current-limiting fuse upstream. The 800 V rated insulation voltage means it handles 480Y/277 V and 600 V delta systems with full coordination margin. Mounts on a standard DIN rail or panel-mount base. At 70 mm deep, 76.2 mm wide, 130 mm tall, it fits a 3-pole MCCB slot in most Siemens SENTRON enclosures and switchboards. The 25 W maximum power loss matters for thermal budgeting in a sealed panel — if you pack six of these side by side, expect 150 W of heat to manage.
Breaking capacity — the number that decides the fault rating
This breaker delivers 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. The steep drop above 440 V reflects the arc-extinction limits of the 3VA platform. If your system runs at 480 V, the 121 kA at 440 V is the closest reference — expect a similar figure, not the 220 kA headline. For 690 V wind or solar collectors, the 17 kA rating is the binding constraint; verify your available fault current stays under that.
Thermal derating — the curve that governs real current
Rated 100 A from 40 °C through 50 °C. At 55 °C it drops to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. If your panel ambient hits 60 °C — common in a packed enclosure next to a furnace line — you lose 4 A of headroom. The operating range spans -25 °C to 70 °C; storage from -40 °C to 80 °C.
Auxiliary configuration and trip indication
Factory-fitted with 2 auxiliary switches plus 1 trip alarm switch and a shunt trip release. The trip indicator and voltage trigger are present — so you get a local mechanical flag and a remote signal path for the protection relay or PLC. No undervoltage release, no ground-fault monitoring, no communication module. If you need UVR or GF, this isn't the variant; look at the 3VA1 with the 'U' or 'F' suffix options.