Feetech ST-5420-C001 7.4V 25kg.cm Coreless Steel Gear TTL Servo

The Feetech ST-5420-C001 is a compact, quick-acting smart servo for robot joints, grippers and small automation mechanisms. It combines a coreless motor, steel gearbox and ball bearings in an aluminium case only 30mm tall, and is commanded and monitored over the TTL serial bus.

Key features

• 90 RPM no-load (0.111 s/60°) at 7.4V with 8.3kg.cm rated torque

• 12-bit magnetic encoder: 4096 positions over 360°, no angle limit

• 0-360° position control plus continuous multi-turn rotation

• Position, speed, voltage, current, temperature and load readable by the host controller

• 65.5g in a low 40.6 x 20 x 30mm body for tight joint packaging

Specifications

• Operating voltage: 4.8-8.4V

• Peak stall torque: 25kg.cm at 7.4V

• Rated torque: 8.3kg.cm at 7.4V

• No-load speed: 0.111 s/60° (90 RPM) at 7.4V

• Current: 480mA no-load, 4.7A stall at 7.4V

• Interface: half-duplex asynchronous serial (TTL), IDs 0-253, 38,400 bps to 1 Mbps

• Horn spline: 25T, 5.9mm OD

• Lead length: 150mm

• Dimensions: 40.6 x 20 x 30mm

• Weight: 65.5g (±1g)

• Operating temperature: -20 to 60°C

The 4.8-8.4V window covers a 2S LiPo directly. Allow 4.7A per servo at stall when sizing the supply for a multi-joint build.