The Siemens 3RF3380-3AA45 is a SIRIUS 3RF33 1-pole solid-state contactor rated for 80 A in AC-1 duty (resistive load) at 40 °C ambient. That 80 A figure is the continuous resistive current it can carry without a heatsink derate — for motor or transformer loads (AC-3 / AC-5b) the rating drops, so match the load type before you spec it. Load-side voltage range is 48-600 V AC, control voltage is 4-30 V DC, and the internal blocking voltage is 1200 V, giving margin for switching on 600 V lines without avalanche failure. The ring cable lug connection means the power terminals accept lugs, not bare wire or ferrules — plan for lug crimping in your panel build. The 1-pole configuration switches one phase; for three-phase loads you need three units or a 3-pole variant.
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