Three poles, normally open, rated for AC-3 and AC-4 duty at 16 A up to 440 V, with a 110 V AC coil. IP20 finger-safe enclosure per VDE 0106, so it's panel-mount only — no washdown exposure.
The AC-3 rating at 16 A up to 440 V covers starting and stopping a squirrel-cage induction motor under load. The AC-4 rating covers plugging and inching at full locked-rotor current. Mechanical shock and vibration ratings are specified per IEC 60068-2-27 and IEC 60068-2-6: the contactor holds closed through 10 Gn on Y and Z axes and 4 Gn vibration at 5–300 Hz. That is enough for most industrial panels on a machine base, but not for direct engine-mount or high-shock applications like stamping presses. Altitude derating kicks in above 2000 m — no derating needed below that, so it is fine for most plant-floor installations.
