What It Is & What It Does
The ABB A16-40-22-84 is a 4-pole contactor from the A16 series, with a coil rated for 110 V at 50 Hz and 110–120 V at 60 Hz. A 4-pole contactor of this class switches motor loads, resistive heating, or other power circuits in a control panel — the four poles let it handle three-phase plus a neutral or an auxiliary load in a single device.
Mounts on DIN rail in a standard enclosure. The 110–120 V 60 Hz coil suits North American control voltages; the 110 V 50 Hz rating covers European legacy panels.