What it is and what it does
The 3RT1015-1WB41: This variant is built around a 24 V DC coil with a built-in varistor surge suppressor, so you don't need to add a separate suppression module on the coil terminals — just wire the DC supply and it's protected against back-EMF from the coil dropout. The coil draws 1.4 W both on pickup and hold, which is typical for this frame size — steady-state dissipation stays low enough that you can group several contactors on a DIN rail without worrying about heat buildup in the enclosure.
Key ratings and what they mean for fit
The headline number for sourcing is the rated operational current: 10 A at 24 V (AC-12 duty, resistive loads), 6 A at 230 V, and 3 A at 400 V. For motor switching, the AC-3 rating at 400 V is 3 kW — that's the figure that decides whether this contactor handles a standard 3-phase motor on a 400 V line. If you're switching a 4-pole motor under 3 kW, this fits; above that, step up to the next frame size. The AC-4 rating at 400 V is 6.5 A — that's the inching/jogging duty cycle rating. If your application does frequent plugging or reversing, use the AC-4 figure, not the AC-3 one. The 6.5 A AC-4 limit means this contactor handles about 2.2 kW of motor load under severe switching duty. For DC switching, the ratings drop fast: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. That's typical for a contactor designed primarily for AC motor duty — don't use it for high-current DC loads above 60 V without checking the curve.
Mounting and wiring
Mounts via screw or snap-on onto 35 mm DIN rail per EN 50022. The S00 footprint is 45 mm wide, 57.5 mm tall, 72 mm deep — that's the same width as a single miniature circuit breaker, so it packs tight on a rail. Side-by-side mounting is allowed with no derating, as long as you maintain the 6 mm clearance to adjacent devices on the front side. Main circuit terminals are screw-type, accepting 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or up to 2x 4 mm² stranded. AWG: 2x 20–16, 2x 18–14, or 1x 12.
Where it lives in the panel
Front face carries an IP20 rating — protected against finger contact, but not against water ingress. This is a dry-panel contactor: mount it inside an enclosure rated for the environment, not exposed outdoors or in washdown zones. Operating temperature range is -25 to +60 °C, with a maximum operating altitude of 2 000 m. Pollution degree 3 means it's rated for industrial environments with conductive pollution or dry non-conductive pollution that becomes conductive due to condensation — standard for an uncoated panel contactor. Mechanical endurance: 30 million cycles typical. Electrical life depends on switching current and voltage. Coil pickup threshold is 0.85 x nominal.
Short-circuit coordination
For Type 2 coordination (no damage to the contactor after a short circuit), use a gL/gG fuse rated 20 A. For Type 1 coordination (contactor may need replacement after fault), the fuse can go up to 35 A. That's the standard recommendation for the S00 frame — if your panel design calls for Type 2, spec the 20 A fuse upstream.
Sourcing and lifecycle
It's a standard SIRIUS catalog item, broadly stocked across distribution. For BOM-line commitments, the key fit check is the 24 V DC coil voltage and the S00 frame size — if those match your panel layout, the rest of the ratings (10 A AC-12, 3 kW AC-3 at 400 V) are well within typical light-duty motor and resistive load ranges.