The KBWC Series provides infinitely variable speed motor control for shaded pole, permanent split capacitor and universal (AC/DC) motors. The full-wave phase control circuitry minimizes power loss, thereby reducing energy requirements. The controls provide infinitely variable speed adjustment which allows the end-user to select the desired level of air volume. - The KBWC Series is a comprehensive line of motor speed controls for air-moving applications that utilize Shaded Pole, Permanent Split Capacitor (PSC), and AC/DC motors. These economical speed controls are designed to replace obsolete, tapped winding, or reactive methods of speed control. Standard Features include built in on/off AC line switch, minimum speed trimpot, and RFI filter, .