The Schneider Electric (Erie) AH13A02A is a 24V spring return (S/R) actuator equipped with an end switch. The "Hco" likely refers to a specific configuration or application within Erie's product line. This actuator is designed to control valves or dampers in HVAC or industrial systems. The spring return feature ensures a fail-safe operation, returning the actuator to a default positio... https://www.partshnc.com/ah13a02a-schneider-electric-erie-24v-hco-sr-actwend-sw