The 381L linear-travel electric actuator operates on AC 220V single-phase power, receiving a standard DC 4-20mA signal from DCS, PLC systems, or other controllers to control valve switching or automatic regulation. The electronic control module employs advanced hybrid integrated circuits with comprehensive protection features, enabling local or remote control. Designed in a sealed resin-encapsulated housing, it incorporates a high-performance conductive plastic potentiometer for drive feedback, offering high precision and extended service life. This actuator can be paired with various angular-travel regulating mechanisms to form high-performance, highly reliable electric control valves.