SIRIUS S3 Power Contactor for Motor and Resistive Loads
The 3RT2046-3SP30: The coil operates on a 175-280 VAC supply at 50/60 Hz, drawing 43 A inrush peak and holding at 10 A at 24 V, 2 A at 48 V, and 2 A at 60 V. The spring-type terminals on the magnet coil simplify wiring — no screw torque to verify. Mounting is via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving panel builders flexibility in tight enclosures.
Duty Cycles and Mechanical Endurance
Switching frequency limits depend on the load category: 900 cycles/hour for AC-1 resistive loads, 850 for AC-3 motor starting, and 250 for AC-4 plugging/reversing. The arcing time is 10-20 ms, and the operate/release times are 38-57 ms for both AC and DC coils. Typical mechanical life is 5,000,000 operations, with an MTBF of 52 years. The main contact rating is 10-2 (likely 10 A make / 2 A break at rated voltage), so size the contactor for the inrush current, not just the steady-state load. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. The auxiliary switch is included, so no separate add-on is needed for basic feedback.
Panel Fit and Clearance Requirements
Dimensions are 70 mm wide, 140 mm high, and 152 mm deep — the depth is the critical dimension for shallow enclosures. Minimum clearances: 10 mm upwards, 10 mm downwards, 10 mm to the side, and 20 mm forward for arc venting. Wire sizes accepted: solid 2.5-16 mm² and stranded 6-70 mm² for the main circuit, with dual solid/stranded 0.5-2.5 mm² for auxiliary connections. The spring-type terminals on the coil side accept solid or ferruled stranded wire without needing a screwdriver.