The 3RT2015-1BB42-ZX95: The 24 V DC coil draws its rated current at 24 V; the contactor's main contacts are rated for AC-3 duty at 750 operations per hour maximum, and AC-4 at 250 operations per hour. The 10 A rating at 24 V DC on the main contacts is the key figure for DC load switching. For AC loads, the contactor carries a 3 A rating at 400 V AC.
For double-wire terminations, the contactor accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². The auxiliary switch is present (yes), which allows for feedback or interlocking without an add-on block.