FEETECH STS3009 Servo Motor

The ST-3009-C001 is a 7.4V 11.5kg magnetic encoder double shaft TTL serial BUS servo designed with an aluminum case, metal gears, ball bearings, and a brushless motor. It features a 25T/OD5.9mm horn gear spline and no mechanical limit. With physical dimensions of 20mm × 30mm × 36.5mm and a weight of 45±1g, it operates within a 4.8–8.4V voltage range. At 7.4V, it delivers a peak stall torque of 11.5kg.cm, a rated torque of 3.8kg.cm, a no-load speed of 0.1sec/60° (100RPM), and a stall current of 2.8A. Utilizing digital packets for command signals, the servo communicates via half-duplex asynchronous serial communication across an ID range of 0–253 with adjustable speeds from 38400bps to 1Mbps. It supports a continuous 360° running degree (0–4096 steps) and provides real-time telemetry feedback for load, position, speed, input voltage, and temperature.

Common use cases: Compact humanoid robot arm and wrist joints requiring 360° magnetic encoder feedback with brushless motor durability, educational robot platforms with TTL serial BUS daisy-chain wiring, lightweight RC models needing serial BUS control, and applications requiring 11.5kg.cm torque in a 45g double-shaft package with full telemetry.