SIRIUS 3RT2317-2XF40-0LA2 — 72–125 V DC Coil, Size S00, Spring-Terminal Power Contactor
The Siemens 3RT2317-2XF40-0LA2 is a SIRIUS-brand power contactor in the compact Size S00 frame (45 mm wide, 70 mm tall, 73 mm deep) designed for switching motor loads and resistive circuits in control panels. Its coil is rated for 72…125 V DC with an extended operating range, meaning it holds in reliably even if the DC supply sags toward the lower end of the band — useful on long cable runs or shared power supplies where voltage drop is a concern. The coil terminates via spring-type terminals, so no screwdriver torque is needed on the control wiring. The contactor snaps onto 35 mm DIN rail per DIN EN 50022 and can be mounted in any orientation — standing, on its side, or rotated ±180° on a vertical surface. Side-by-side mounting is allowed, so multiple contactors can pack tightly on the rail without derating spacing. The operating temperature range is -40 to +70 °C, covering most indoor panel environments and some unheated enclosures.
Mounting & Integration Notes
Fastening: screw and snap-on mounting onto 35 mm DIN rail per DIN EN 50022. The spring-type coil terminals accept 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), or 2x 4 mm² solid conductors — strip length is standard for spring-cage terminations. Main contact wiring uses the same spring-clamp system; no screwdriver calibration needed. Clearance: allow 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm at the side for arc flash and heat dissipation. Arcing time is 10…15 ms; the DC coil dropout delay is 25…45 ms — factor this into safety circuit timing if the contactor is used in a stop chain.
Ratings & What They Mean for Fit
The coil inrush current peaks at 1.1 A at 72–125 V DC, then settles to a holding current determined by the full-scale value of 1.25 and the initial value of 0.7 — these parameters define the coil's thermal load on the DC supply. For AC-4 duty (plugging / inching), the maximum switching rate is 250 operations per hour. The auxiliary switch is included, so no separate add-on block is needed for status feedback. Mechanical life is typical at 30,000,000 operations. Storage temperature range is -55 to +80 °C.