The 52-4891 is a DC motor module produced by Jewell Modutec. It is designed for motor and AC fan speed control in a wide variety of applications. The module features a high efficiency and low power consumption, and can be used in both open and closed systems. The 52-4891 features a current rating of up to 0.9A and a voltage rating of up to 24V AC or DC. It also features a wide range of operational temperatures, from -25 to +70 C. It includes a range of protective features to ensure reliable, long-term operation, such as an IC protection circuit, and a fault detection limit function. The 52-4891 also has a built-in overvoltage protection.