The Siemens 3RF3330-1AA22 is a 1-pole solid-state contactor from the SIRIUS 3RF33 series, rated 30 A in AC-1 duty at 40 °C. AC-1 is the resistive load category per IEC 60947-4-2 — that 30 A figure governs switching heaters, lighting banks, and other non-inductive loads where inrush is minimal. For motor or transformer loads (AC-3/AC-4), you'd derate; the AC-1 number is the ceiling for this part's intended use. Control voltage spans 24-230 V AC on the low side and 110-230 V AC on the high side, with screw terminals for panel wiring. The dual-range control input means one part covers both 24 V and 230 V control circuits without a separate coil variant — simplifies spares stocking on a line with mixed control voltages.
Compliance documentation for quality and regulatory trace
RoHS compliant since 15 January 2024.
Packaged at 105 x 27 x 122 mm — the 27 mm width is a single 1.5-module DIN-rail footprint, so it slots into a standard enclosure without crowding adjacent devices.