Motor-Rated Current and AC-3 Duty Cycle
The 3RT2045-1AD00 carries 77 A at 480 V in AC-3 duty (cite:) — that's the motor-switching rating that governs real-world contactor sizing for three-phase induction motors up to that full-load current. For high-cycle applications, the AC-3 switching frequency is rated at 1,000 operations per hour maximum (cite:), which sets the thermal budget for the arc chamber and contact erosion rate. The AC operating time spans 10 to 21 ms (cite:) and the arcing time 10 to 20 ms (cite:) — these intervals matter when coordinating with upstream short-circuit protection devices; the contactor must clear the arc within the breaker's total clearing time to avoid welded contacts on a fault.
DIN Rail Mounting and Panel Clearances
This S3-frame contactor mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 60715 (cite:). The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward (cite:) — useful when the panel layout forces a non-vertical orientation for cable entry. Minimum clearances to adjacent components: 10 mm upwards, 10 mm downwards, 10 mm at the side, and 20 mm forwards (cite:,). The overall dimensions are 140 mm height, 70 mm width, and 152 mm depth (cite:,) — verify the depth against the enclosure gland plate depth before committing the panel layout.
Wiring Terminals and Conductor Range
Main contact terminals accept solid conductors from 2.5 to 16 mm² (cite:) and stranded conductors from 6 to 70 mm² (cite:) — the stranded range covers the full ampacity for the 77 A rating without needing a ferrule or pin terminal. The magnet coil uses screw-type terminals (cite:) with a dual-wire capacity of 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²) (cite:).
Coil Pickup and Auxiliary Contact Provisions
The coil draws 10 A at 24 V rated value (cite:) — this is the inrush current at pickup, not the holding current. For control transformer sizing, the 24 V inrush figure drives the VA requirement; the holding current is lower but not listed here. An auxiliary switch is included as standard (cite:), which provides feedback to the PLC or safety circuit without an add-on block. Mechanical endurance is rated at 10,000,000 operating cycles typical (cite:) — this suits applications with frequent switching such as conveyor indexing or HVAC compressor cycling, where the contactor outlasts the motor's service life.
Environmental Ratings and Storage Limits
Operating temperature range is -25 to +60 °C (cite:), and storage temperature spans -55 to +80 °C (cite:). The -55 °C storage floor confirms suitability for cold-weather warehouse storage or unheated transport.