The Siemens SIRIUS 3RT1024-1AB00-1AA0 is a Size S0 power contactor with three normally-open main contacts, rated for 7.5 kW at both 500 V and 690 V.
Ratings and coordination
AC-2 duty at 400 V delivers 5.5 kW; AC-4 at 400 V is rated 12.5 A. For resistive loads (AC-12), the maximum operating current is 10 A. Type 1 coordination requires a 63 A gL/gG fuse; Type 2 coordination calls for a 25 A gL/gG fuse. The auxiliary contacts handle 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V.
Snap-on mounting onto a 35 mm standard rail (DIN EN 50022). Side-by-side mounting is allowed — no derating gaps required. Solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded: 2x (1–2.5 mm²), 2x (2.5–6 mm²), max 2x 10 mm². AWG equivalents: 2x (16–12), 2x (14–10), 1x 8.