What this MCCB is and what the ratings mean
The Siemens 3VA2110-6HN32-0BA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. Its continuous current rating is 100 A, and it holds that rating across the full ambient temperature range from 40 °C up to 70 °C — no derating needed for a warm enclosure. That 100 A is the rated value, not a maximum; the breaker is sized for a 100 A feeder or main. The interrupting ratings are what define where this breaker can be applied. At 240 V it clears 242 kA; at 415 V and 440 V it clears 187 kA; at 500 V it clears 121 kA; at 690 V the rating drops to 3.7 kA. The high 242 kA figure at 240 V means this MCCB can be placed at the service entrance of a high-fault-current installation without needing a current-limiting fuse upstream. The 690 V figure of 3.7 kA is the limit for that voltage class — verify the available fault current at the point of installation. The breaker is 3-pole, with an undervoltage release (UVR) fitted as the auxiliary release. The undervoltage release trips the breaker when supply voltage drops below a threshold, protecting downstream equipment from brownout conditions. The supplied basic switch is order code 3VA21106HN320AA0. There is no ground-fault monitoring module, no communication function, and no voltage trigger on this variant. Rated insulation voltage is 800 V. Power loss at rated current is 12.5 W maximum — a figure to consider for enclosure thermal calculations if the panel is densely packed.
Panel integration and physical fit
Dimensions are 86 mm depth, 105 mm width, 181 mm height. The 105 mm width is the standard 3-pole MCCB footprint for this SENTRON generation — it occupies three 35 mm DIN-rail mounting spaces. The depth of 86 mm includes the body and the handle throw; allow clearance for cable bending radius and the undervoltage release wiring. The breaker snaps onto a DIN rail; no additional mounting plate needed.