# Feetech STS3215-C018 12 V Serial Bus Servo

![Feetech STS3215-C018 12 V Serial Bus Servo](https://parts.trymaglev.com/img/ac-feetech-sts3215-c018.webp)

The 30 kg·cm, 12-bit magnetic-encoder bus servo used in the Hugging Face LeRobot SO-100/SO-101 arms; the low-cost Dynamixel-XL430 substitute.

- Maglev ID: ac-feetech-sts3215-c018
- Brand: Feetech
- MPN: STS3215-C018
- Category: actuators / Smart Serial Servos
- Origin: CN (maker HQ, factory not confirmed)
- Maker: Shenzhen Feetech RC Model (深圳飞特模型) (brand, CN)
- NDAA: unknown · Blue UAS: unknown · FCC: n/a
- HTS: 8501.10.40.60 (typical)
- MOQ: unknown · Lead time: unknown
- Confidence: REPORTED

## Price
- 1+: $27.99 (distributor, 2026-10-29, https://openelab.com/products/feetech-sts3215-c018-servo-12v; OpenELAB US listing (ships from China warehouse))

## Specifications
- Stall torque: 30 kg·cm @ 12 V (rated 10 kg·cm)
- No-load speed: 0.222 s/60° (45 rpm) @ 12 V
- Voltage: 4-14 V (tested at 12 V)
- Interface: Half-duplex TTL serial bus (STS protocol)
- Feedback: 12-bit magnetic encoder (~0.088°/step)
- Mass: 55 ± 1 g
- Gear ratio: 345:1, copper gears

## Links
- Product: https://openelab.com/products/feetech-sts3215-c018-servo-12v
- Datasheet: none
- CAD: none

## Equivalents
- ROBOTIS DYNAMIXEL XL430-W250-T (ac-dynamixel-xl430-w250-t)
- Hiwonder LX-16A Serial Bus Servo (ac-hiwonder-lx-16a)
- ROBOTIS DYNAMIXEL XM430-W350-T (ac-dynamixel-xm430-w350-t)

## Sources
- https://openelab.com/products/feetech-sts3215-c018-servo-12v (spec table + price)
- https://www.waveshare.com/st3215-servo.htm (Waveshare ST3215 (same spec family, maker not named) $16.99-21.99 range)