The 3RF3330-1BA04: This is a Siemens SIRIUS 3RF33 solid-state contactor, single-pole, rated 15 A in AC-15 duty at 40 °C — that's the inductive load rating for solenoid valves, contactor coils, and electromagnetic brakes, not the resistive heating load. The 48-460 V operating range on the power side covers most common three-phase and single-phase line voltages across global sites. Coil is 24 V DC, screw terminals. Instantaneous switching means no zero-cross turn-on delay — useful when you need the load on immediately after the coil fires.
At 15 A and 40 °C ambient, this part handles the inrush from a bank of smaller contactors or a half-dozen solenoid valves without derating. The 48-460 V power supply range means it works on 110 V, 230 V, 400 V, and 480 V lines straight out of the box — no voltage selection jumpers. Screw terminals are field-friendly: no special crimp tool needed, just a standard slotted driver. Mounts on standard DIN rail.