Key ratings and what they mean for fit
The 3RT1034-3AP60: The AC-3 motor rating is the headline figure: 18.5 kW at 500 V. That is the real-world load capacity for a standard three-phase induction motor. At 400 V it drops to 15 kW, and at 690 V it is 10 kW. The contactor also carries an AC-2 rating of 15 kW at 400 V for slip-ring motors. These duty-specific ratings matter more than a single 'rated current' number because they reflect the actual switching stress. The coil is wound for 50/60 Hz operation at 220-240 V with an operating range of 0.8 to 1.1 times rated voltage. That means it pulls in reliably even if the line sags to 176 V on a 220 V nominal system. The contactor is rated for pollution degree 3, so it is suited for industrial environments with conductive dust or occasional condensation. Auxiliary contact ratings are given for both AC and DC loads: 10 A at 24 V DC, 6 A at 230 V AC, and 3 A at 400 V AC. For DC switching, the current drops sharply with voltage due to arc extinction limits — 0.3 A at 220 V DC is typical for a contactor this size. The mechanical life is rated at 10 million operations typical, which is standard for a SIRIUS S2 frame.
Mounting and wiring integration
The contactor measures 55 mm wide, 112 mm high, and 115 mm deep. It snaps onto 35 mm DIN rail or can be screw-mounted. Side-by-side mounting is allowed with no derating for the main circuit, which saves panel width when grouping multiple contactors. The main power circuit uses screw-type terminals accepting solid conductors up to 2x 2.5 mm² or stranded up to 2x 25 mm². Auxiliary terminals take solid up to 2x 2.5 mm² or stranded up to 2x 16 mm². The front of the contactor is IP20, so it is touch-safe once installed in an enclosure. The terminals themselves are IP00, meaning they require the panel's own IP rating for protection against solid objects. Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C.