What it is and what it does
The Siemens 3RT1016-1AM25 is a SIRIUS power contactor in frame size S00, designed for switching motor loads in control panels. It is rated for AC-3 duty at 4 kW at 400 V, meaning it handles the high inrush of squirrel-cage motors during starting. The coil is wound for 208 V at both 50 Hz and 60 Hz, with a tolerance band of 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz.
Mounting and integration
Mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, saving panel space at 45 mm width and 57.5 mm height. Depth is 114 mm — leaves room for wiring ducts. Side-by-side mounting is permitted with a 6 mm gap to adjacent devices for heat dissipation. Pollution degree 3 rating suits industrial environments with conductive dust or condensation.
Electrical ratings and wiring
Main contacts are screw-type terminals accepting 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid/stranded, with AWG equivalents 2x (20-16), 2x (18-14), and 1x 12. Auxiliary contact block (3-pole instantaneous) carries 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. For AC-4 (plugging/reversing) duty at 400 V, rated current is 8.5 A. Mechanical life is 30 million operations. Short-circuit coordination: type 2 requires 20 A gL/gG fuse; type 1 allows 35 A gL/gG.