The Siemens 3RF3320-2AA02 is a 1-pole SIRIUS 3RF33 solid-state contactor rated AC-1 at 20 A at 40 °C, with a control supply range of 24-230 V AC / 24 V DC and spring-loaded terminals. The AC-1 rating of 20 A at 40 °C means this contactor handles resistive loads (heating, lighting) up to that current without derating; for motor or inductive loads, the AC-3/AC-4 rating would be lower, so match the duty cycle to the load type.
RoHS compliance effective 15-Jan-2024; REACH Article 33 applies due to lead content (CAS 7439-92-1 > 0.1% w/w).
Integration notes
Mounts on standard DIN rail; the 105 x 27 x 122 mm footprint fits a single-module width in a control panel. The 24-230 V AC / 24 V DC control supply covers both AC and DC control circuits without a separate power supply module. For a 20 A resistive load at 40 °C ambient, this contactor operates without forced cooling in a standard IP20 enclosure. If ambient exceeds 40 °C, consult the thermal derating curve for the 3RF33 series.