Rittal SK 3120.200 Fan Speed Controller For 2Pole 1Ph AC Motor

The SK 3120.200 electronic speed controller is designed for 2-pole, single-phase AC motors used in Rittal TopTherm fan-and-filter units and air-to-air heat exchangers. It accepts 100–230 V AC input and provides controlled output up to 300 W (2 A), making it suitable for precise, low‑power cooling tasks inside enclosures. The compact module measures 105 mm wide × 90.5 mm high × 60.2 mm deep and includes an NTC temperature sensor with a 1.80 m cable to support temperature‑based speed adjustments. This controller is specifically intended for use with filter fans and air-to-air heat exchangers within Rittal enclosures, delivering reliable, quiet performance in cabinet cooling applications.