SIRIUS S0 Contactor with 110 VDC Coil
The Siemens 3RT2326-1BF40 is a SIRIUS S0-frame contactor with a 110 VDC magnet coil terminated at screw-type terminals. It carries an integrated auxiliary switch block (1 NC + 1 NO) and accepts up to two additional attachable auxiliary contact blocks for expanded signaling or interlocking. Rated for main contact duty at 16 A through 8 A depending on utilization category, this contactor is sized for motor loads up to 7.5 kW at 400 V AC-3. The DC coil pulls in reliably at 0.8 × rated voltage (88 VDC minimum pick-up) and holds through the full 1.1 × rated voltage over-range. The S0 footprint (85 mm high × 60 mm wide × 107 mm deep) fits standard panel layouts; clearance requirements are 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm to the side.
Auxiliary Contact Ratings Across Voltages
The built-in auxiliary contacts are rated for a wide range of control voltages: 10 A at 24 VDC, 6 A at 60 VDC, 1 A at 110 VDC, 0.9 A at 125 VDC, 0.3 A at 220 VDC, and 0.1 A at 600 VDC. On the AC side, they handle 10 A at 230 VAC and 3 A at 400 VAC. This covers most PLC output and relay interface loads without derating.
Environmental and Wiring Details
Auxiliary and coil terminals accept solid wire 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²). The DC coil dropout time is 15 to 18 ms; arcing time is 10 ms.