The Siemens SIRIUS 3RT2027-1CK64-3MA0 is a power contactor in the S0 frame size, designed for switching motor loads in control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, fitting a 45 mm wide slot in the enclosure. Rated for continuous operation from -25 to +60 °C, the contactor handles the thermal environment inside a closed panel without forced ventilation in most industrial settings. The screw-type terminals on the magnet coil accept solid or stranded conductors from 1 to 10 mm², matching standard panel wiring practices for control circuits.
Sourcing and Lifecycle
For a BOM line requiring this exact part, the sourcing posture is straightforward: quoted to order against an RFQ. No need to evaluate a substitute unless the buyer prefers an alternate coil voltage variant.
Mounting and Integration
The S0 frame contactor occupies 45 mm width on the DIN rail, with 85 mm height and 141 mm depth. Clearance requirements: 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm at the side for heat dissipation and wiring access. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in dense panel layouts where rail orientation is constrained.
Switching Performance
Maximum operating frequency varies by duty: 1000 cycles/hour at AC-1 (resistive), 750 cycles/hour at AC-2 and AC-3 (motor starting/running), and 250 cycles/hour at AC-4 (plugging/inching). The arcing time is 10 ms, and the make/break duration at AC is 4 to 16 ms. Coil holding power draws 0.25 A at 50 Hz and 0.28 A at 60 Hz, a standard range for S0-frame contactors that the control transformer must supply.