What It Is and Where It Fits
The Siemens 3RT2015-1BN41 is a SIRIUS power contactor in the compact S00 frame, designed for switching motor loads in control panels. It mounts on a 35 mm DIN rail per DIN EN 60715 via screw or snap-on fastening, making it a straightforward drop-in for standard panel layouts. The S00 frame keeps the footprint tight at 45 mm wide, 58 mm tall, and 73 mm deep — important for high-density cabinet layouts where every millimeter of DIN rail counts.
Key Ratings and What They Mean for Your Circuit
The main contacts are rated for 20 A down to 12 A, covering small to medium motor loads. The 24 VDC coil draws 10 A at rated value — that's the holding current, not the inrush; the DC operating time is 7 to 13 ms, and arcing time runs 10 to 15 ms, so the contactor responds fast enough for standard motor starting sequences. Switching frequency varies by duty: up to 1000 cycles per hour for resistive loads (AC-1), 750 cycles/h for motor starting (AC-2 and AC-3), and 250 cycles/h for plugging or inching (AC-4). If your application involves frequent reversing or jogging, the AC-4 limit is the one that governs contact life — don't size based on the AC-3 number alone.
Mounting and Environmental Tolerance
The contactor can be mounted in any orientation within ±180° rotation on a vertical surface, and tilted forward or backward by ±22.5°. Clearance requirements are modest: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides — so it fits in tight enclosures without forced spacing. Operating temperature spans -25 to +60 °C, with storage from -55 to +80 °C. That covers most indoor industrial environments without derating concerns.