FEETECH STS5420 Servo Motor
FEETECH STS5420 Servo Motor
The ST-5420-C001 is a high-performance 7.4V 25kg coreless steel gear 360° single shaft serial BUS servo housed in a durable aluminum case. Driven by a coreless motor with a steel gear train and ball bearings, it features a 25T/OD5.9mm horn gear spline and no mechanical limit. Its physical dimensions are 40.6mm × 20mm × 30mm, with a weight of 65.5±1g. Operating over a 4.8–8.4V voltage range, it delivers a peak stall torque of 25kg.cm, a rated torque of 8.3kg.cm, a no-load speed of 0.111sec/60° (90RPM), and a stall current of 4.7A at 7.4V. Utilizing digital packets for command signals, the servo communicates via half-duplex asynchronous serial communication across an ID range of 0–253 with speeds from 38400bps to 1Mbps, providing a full 360° running degree (0–4096 steps). For advanced closed-loop systems, it outputs comprehensive real-time telemetry feedback covering load, position, speed, input voltage, current, and temperature.
Common use cases: Humanoid robot arm and shoulder joints requiring 360° serial BUS control with coreless motor responsiveness, high-end RC models with serial BUS daisy-chain wiring, industrial automation end-effectors, competition robot actuators, and applications needing 25kg.cm torque with full telemetry across a wide 4.8–8.4V range.
| PRODUCT PARAMETERS | |
| Model | ST-5420-C001 |
| Product Name | 7.4V 25kg.cm Coreless Steel Gear 360° Single Shaft Serial BUS Servo |
| Storage Temperature Range | -30℃~80℃ |
| Operating Temperature Range | -20℃~60℃ |
| Size | A：40.6mm B：20mm C：30mm |
| Weight | 65.5±1g |
| Gear type | Steel |
| Limit angle | NO limit |
| Bearing | Ball bearings |
| Horn gear spline | 25T/OD5.9mm |
| Horn Offset Angle | 0° |
| Case | Aluminum |
| Connector wire | 15CM |
| Motor | Coreless Motor |
| Operating Voltage Range | 4.8–8.4V |
| No load speed | 0.111sec/60° (90RPM)@7.4V |
| Running current (at no load) | 480mA@7.4V |
| Peak stall torque | 25kg.cm@7.4V |
| Rated torque | 8.3kg.cm@7.4V |
| Stall current | 4.7A@7.4V |
| Command signal | Digital Packet |
| Protocol Type | Half Duplex Asynchronous Serial Communication |
| ID range | 0–253 |
| Communication Speed | 38400bps ~ 1Mbps |
| Running degree | 360° (0~4096 steps) |
| Feedback | Load, Position, Speed, Input Voltage, Current, Temperature |