GO495420 is a motor speed control manufactured by Danaher. It is a single-phase, brushless DC motor speed controller that can be used in applications including fans, blowers, pumps, and compressors. The motor speed controller is designed for use with motors up to 2-3 horsepower and can provide an output speed range of about 0-100% using pulse width modulation. The controller also features adjustable current limit, dynamic brake, auto restart, soft start, and range limit settings. It is available in 24, 120, and 230-volt versions.