It carries an AC-3 utilisation category rating of 18 A at up to 440 V, meaning it's sized for switching three-phase induction motors on and off under load — the standard duty cycle for conveyor drives, pumps, and compressors. The 110 V AC coil at 60 Hz matches North American control voltage common in older panels and retrofit work.
The AC-1 rating covers resistive loads like heaters, where the switching current is lower due to no inrush. The 110 V AC coil draws its control power from a separate circuit — verify the control transformer is sized for the coil inrush if you're replacing a different coil voltage variant. The contactor carries a 1.5 ms non-overlap time between NC and NO contacts, which matters if you're using the auxiliary for interlocking — it guarantees the NC opens before the NO closes on energisation, and vice versa on de-energisation.
TH protective treatment per IEC 60068-2-30 means it's tested for damp heat, so condensation in an unheated enclosure won't cause early failure.
Certified to EN/IEC 60947-1 (general rules), 60947-4-1 (contactors and motor-starters), and 60947-5-1 (control-circuit devices). Also meets GB/T equivalents for the Chinese market and EN/IEC 60335-1 Clause 30.2 for glow-wire resistance in household appliances.