What the 105A Rating Means for Your Panel
The ABB AF75-30-00-69RT is a current-production contactor rated 105A, meaning it handles motor loads and resistive circuits up to that current under AC-1 or AC-3 duty, depending on the coil and application. The 105A figure is the thermal continuous current — the wire size and terminal capacity that governs the buswork in the panel. For a 3-phase motor, that typically matches a 55–75 kW induction motor on 400 VAC, but the exact sizing depends on the utilization category your design calls for. This contactor sits in the ABB AF75 series, which uses an electronic coil interface that holds in at low power and reduces coil burn-out risk compared to older DC-operated coils.
Mounts on standard DIN rail — the AF75 footprint matches the common 45 mm wide contactor form factor, so it fits alongside motor starters, overload relays, and busbars in a standard enclosure. The electronic coil draws minimal holding current once picked up, which keeps the control transformer sizing lean. If you're paralleling multiple contactors on the same control circuit, check the inrush against the transformer VA rating — the AF75 coil inrush is higher than the hold, as with any contactor, but the electronic interface keeps the steady-state draw under 2 VA typically.
ABB provides standard compliance documentation for the AF75 series including CE marking, RoHS and REACH declarations, and UL/CSA listings where applicable. The contactor carries IEC 60947-4-1 ratings for motor switching and general-purpose loads. For a quality doc control review, the nameplate matches the order code AF75-30-00-69RT — verify the coil voltage code (69RT indicates the coil variant) against your control voltage before wiring.