Description
Bosch 0390203309 is an AHC2 two-stage geared DC motor designed for low-speed, high-torque positioning applications. It is not intended as a continuous-duty drive motor, but rather as an actuator for moving mechanisms to a commanded position and then holding that position using its non-backdrivable gearbox. It combines a large gear reduction with Hall-effect position feedback, Bosch designed this motor for precise actuation rather than continuous rotation.
Common applications include:
Automotive
- Convertible top mechanisms
- Active aerodynamic devices
- HVAC air distribution doors
- Fresh-air/recirculation flaps
- Seat adjustment systems
- Power window mechanisms
- Liftgate and hatch actuators
- Mirror positioning
- Wiper positioning systems
- Electronic latch and locking systems
Commercial Vehicle / Off-Highway
- HVAC blend doors
- Airflow dampers
- Battery enclosure vents
- Hydraulic valve actuation
- Engine compartment shutters
- Equipment access doors
- Cab positioning systems
- Locking mechanisms
Industrial Equipment
- Valve actuators
- Damper controls
- Medical equipment positioning
- Laboratory automation
- Agricultural equipment actuators
- Small robotics joints
- Safety lock actuators
- Garage door and access control mechanisms
Why the Hall Sensor Matters
The 0390203309 includes an integrated Hall sensor, which allows the controller to:
- Determine motor rotation direction
- Measure rotational movement
- Perform closed-loop position control
- Detect stalls or end-of-travel
- Synchronize movement with other actuators
This makes it suitable where precise positioning is required without adding an external encoder.