The Siemens 3RF3350-3AA02 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated AC-1 / 50 A at 40 °C. Control voltage spans 24-230 V AC and 24 V DC, with ring cable lug connection terminals. This is the part for switching resistive loads up to 50 A without the mechanical wear of a traditional contactor — no coil replacement, no contact pitting, just a solid-state junction that switches cleanly.
AC-1 covers resistive loads (heaters, lighting) where the current and voltage are in phase, so there's no inductive kick to manage. If you're switching a motor or transformer, that's AC-3 or AC-4 duty — this part isn't rated for that, and you'd need a different 3RF3 variant. Control voltage is 24-230 V AC and 24 V DC — universal enough for most panel supplies, but note the DC control is 24 V only, not the full AC range. The ring cable lug connection expects a ring terminal, not a fork or pin, so verify your wiring terminations before panel assembly.
This is a DIN-rail mounted solid-state contactor from the SIRIUS 3RF33 family. The 1-pole form factor means it switches one phase — for three-phase resistive loads, you'd need three units or a 3-pole variant. The ring cable lug connection is robust for industrial environments but takes a bit more time to terminate than a spring-cage terminal block. Packaging dimensions are 105 x 50 x 125 mm, so it occupies roughly 50 mm of DIN-rail width. Plan for that when laying out your panel — it's not a compact module, but it's standard for a 50 A solid-state contactor in this class.
RoHS compliant since 15-01-24.