The Siemens 3RF3125-2AA04 is a 1-pole SIRIUS 3RF31 solid-state relay in the 22.5 mm housing, rated for 25 A continuous load current across a 48-460 VAC supply range, with a 24 VDC control input terminated via spring-loaded cage clamps. For motor or transformer loads, derate per the manufacturer's AC-51/AC-53 curves; the 25 A is not a motor full-load current.
RoHS compliance is confirmed effective 15 January 2024.
The 22.5 mm width matches the standard SIRIUS 3RF3 footprint — it snaps onto a 35 mm DIN rail per EN 60715. The spring-loaded terminals accept 0.2–2.5 mm² solid or ferruled stranded conductors; strip length is 8 mm. No tool needed for clamping, but a screwdriver is required for release. Packaging dimensions are 104 x 44 x 48 mm — plan for a single unit occupying roughly 0.22 L of shipping volume. The relay is supplied individually, not in bulk reels.