Siemens 3RT7046-1AP00 — SIRIUS S3 Contactor, 3-Pole, AC Control
The Siemens 3RT7046-1AP00 is a SIRIUS S3 contactor with three main poles, each normally open, and an AC-operated coil. It is rated for AC-3 duty up to 690 V, making it suitable for switching three-phase motor loads in control panels. The contactor mounts via screw or snap-on onto 35 mm and 75 mm standard DIN rails, with flexible mounting orientation — ±180° rotation on a vertical surface and ±22.5° tilt forward/backward allowed.
Key Ratings and What They Mean for Fit
The AC-3 rated operational voltage maximum of 690 V means this contactor can switch motor loads in 400 V or 690 V line-to-line systems, covering standard European industrial voltages. The S3 frame size (148 mm height, 70 mm width, 139 mm depth) fits within typical panel layouts for mid-range contactors — verify clearance for the 139 mm depth, especially in shallow enclosures. The IP20 front protection allows safe touch access in a closed panel; the terminal area is IP00, so live parts are exposed during wiring — standard practice for panel builders.
Panel Integration and Wiring
Screw-type terminals on both main and auxiliary circuits accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire with ferrules. The contactor supports side-by-side mounting without derating, and the auxiliary switch can be added via the product extension slot. Coil holding power is 0.27 W DC, closing power 0.68 W DC — negligible thermal load in a crowded panel. The surge voltage resistance of 6 kV (pollution degree 3) ensures reliable operation in industrial environments with moderate transients.