Screw-type terminals on the main circuit accept 2x (0.5... 1.5 mm²) solid/stranded, 2x (0.75... 2.5 mm²), or up to 2x (0.75... 4 mm²) — standard for panel wiring with ferruled conductors.
DC switching ratings — the key selection criteria
For DC load switching, the 3RT1516-1BG40 is rated 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 0.8 A at 440 V. These are the make/break currents for resistive DC loads; the arcing time runs 10... 15 ms, and the operate time at DC is 7... 10 ms. The auxiliary contacts (1 NO + 1 NC) each carry 9 A — enough for interposing relays or PLC inputs in the same panel.
Depth is 72 mm — check gland-plate clearance if the panel is shallow. Mounting position: vertical surface, +/-180° rotatable, +/-30° tiltable front/back. Front face is IP20; terminals are also IP20. Rated impulse withstand voltage for main and auxiliary circuits is 6 kV.
