The Siemens 3RF3330-1BA24 is a 1-pole SIRIUS 3RF33 solid-state contactor rated for AC-15 duty at 15 A at 40 °C ambient. AC-15 is the switching category for electromagnetic loads — solenoids, contactor coils, and clutches — where inrush currents can be several times the holding current. The 15 A rating means it handles the steady-state current of those loads; the silicon switching element absorbs the inrush without contact wear, which is the reason you spec a solid-state contactor over a mechanical one in high-cycle applications. The control supply accepts 110-230 V AC, and the main circuit spans 48-460 V AC. Switching is instantaneous — no zero-cross or soft-start logic inside this variant. The screw terminals are sized for panel wiring up to the rated current; strip length and torque per the terminal marking on the device.
The 105 x 27 x 122 mm envelope leaves room alongside a motor starter or overload relay in a motor control center row.
The 3RF3330-1BA24 carries an active lifecycle status from Siemens. It is a current-production catalog item within the SIRIUS 3RF33 family.
Compliance documentation
RoHS compliance is declared effective 15 January 2024.