The ABB A110-30-11-50 is a three-pole contactor from the A110 series, configured with 3 main poles and a built-in 1 N.O. + 1 N.C. auxiliary contact block. The "30-11" suffix denotes the auxiliary configuration — one normally-open and one normally-closed contact, which covers basic feedback and interlocking in motor starter or lighting control circuits without needing a separate add-on block.
Integration Note
Mounts on DIN rail or panel via the standard A110 baseplate. The 3-pole main contacts handle three-phase motor or resistive loads; the integral auxiliary block saves a slot in the enclosure compared to stacking a separate side-mount. Spring-cage or screw terminals on the A110 series accept 1.5–16 mm² conductors depending on the variant — verify the specific termination type on the unit received, as the order code alone does not distinguish screw vs. cage.