The Siemens 3RT2017-1JB41 is a SIRIUS coupling contactor in the compact S00 frame size, designed for switching DC loads up to 10 A at 24 V rated value. The coil pulls in at 24 V DC nominal, and the contactor is rated for a mechanical life of 30,000,000 operating cycles typical.
The 24 V DC coil draws a holding current that stays within the typical inrush profile for S00 contactors—expect an initial pickup of 0.7 A, settling to a lower sealed value. Switching capacity at 24 V DC is 10 A, which drops to 2 A at 48 V or 60 V, and further to 0.3 A at 220 V DC—this derating curve is driven by arc extinction limits in DC circuits; the contactor's arcing time is 10 to 15 ms, so inductive loads need a flyback diode across the coil to avoid contact welding. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C, so it handles unheated enclosures in temperate climates. Mechanical switching frequency varies by duty: up to 1,000 cycles per hour at AC-1 (resistive), 750 cycles/h at AC-2 and AC-3 (motor starting/running), and 250 cycles/h at AC-4 (plugging/inching). For AC-3e (enhanced motor switching) it's also 750 cycles/h. These limits reflect thermal rise in the contact tips—pushing beyond them shortens electrical life.
The contactor occupies 45 mm width on the DIN rail, with a depth of 73 mm and height of 58 mm. Clearance requirements: 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm at the sides—tight enough for dense panels but watch the side gap for heat dissipation. Screw-type terminals accept solid or stranded wire from 0.5 to 4 mm², with dual-wire capacity for 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, so it fits angled subpanels without derating.