Active production SIRIUS S3 — what it means for your BOM
The 3RT2045-1AC20: Rated for AC-3 switching at up to 1000 operating cycles per hour, this contactor handles motor loads in the S3 frame size — the duty class that matters for conveyor, pump, and compressor starts. The screw-type main coil terminals accept solid wire from 2.5 to 16 mm² and stranded from 6 to 70 mm², covering the common panel wiring gauges without needing crimp lugs.
Auxiliary contact ratings and switching frequency
Mechanical life typical at 10 million operations; arcing time spans 10 to 20 ms at AC — the contactor is sized for frequent cycling within the AC-3 envelope.
Temperature range and storage conditions
The wide storage range means spares can sit on the shelf for years without degradation, as long as they stay within the -55 to +80 °C envelope.