The Siemens 3RF3310-2AA22 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated 10 A in AC-1 duty at 40 °C. AC-1 covers resistive or lightly inductive loads — heaters, ovens, lighting banks — where the current waveform stays near sinusoidal and inrush is minimal. If you are switching motor loads (AC-3/AC-4), this is not the right curve; the 3RF33 series is built for resistive switching, not the locked-rotor inrush of a motor start.
Control voltage and termination — what to expect at the panel
The control circuit accepts a wide dual-range supply: 24-230 V AC/DC on one side, 110-230 V AC on the other. That covers most panel voltages from 24 VDC control buses up to 230 V line-fed coils, without needing a separate transformer tap. Termination is spring-loaded (cage clamp), which speeds wiring in high-density panels — no screw torque check, just strip and insert. The 1-pole form factor means it switches one line; for three-phase resistive loads you stack three units or move to a 3-pole variant.
Sourcing reality — active line, quoted to order
As a current-production SIRIUS component, the 3RF3310-2AA22 is sourced through standard Siemens distribution channels. The group code is R711 and product group 3725 — useful if you are reconciling a BOM against Siemens internal classification. No second-source or cross-reference exists within the SIRIUS family that is pin-for-pin identical; the 3RF33 series is the designated solid-state contactor line for resistive loads. Specify it into the BOM with confidence — the lifecycle status is clean, and the spring-loaded terminal variant is the standard stocking option.