# Waveshare ST3235 Servo 30 kg·cm 12 V

> Waveshare ST3235 serial bus servo with steel gears: 30 kg·cm (2.94 N·m) at 12 V, 45 rpm no-load, 1:345 steel gear train, 6–12 V (typ. 12 V), 360° magnetic encoder (0.088°), position / continuous-rotation / stepper modes, TTL bus to 1 Mbps with up to 253 IDs, feedback of position, load, speed, voltage, current and temperature, 45.22 × 35 × 24.72 mm, 70.5 g.

- Manufacturer: Waveshare
- Part number: ST3235
- Category: Actuators
- Canonical page: https://www.xirkit.io/products/waveshare-st3235-servo-30-kg-cm-12-v-883d
- Structured JSON: https://www.xirkit.io/products/waveshare-st3235-servo-30-kg-cm-12-v-883d/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Actuator type | smart_servo |
| Gearbox | 345:1 |
| Peak torque | 2.942 N·m |
| No-load speed | 45 rpm |
| Rated voltage | 12 V |
| Torque constant Kt | 1.079 N·m/A |
| Encoder | 360° magnetic, 12-bit (4096 per turn) |
| Control interface | TTL |
| Control modes | position (servo mode), continuous rotation (motor mode), stepper mode |
| Dimensions | 45.22 × 24.72 × 35 mm |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.waveshare.com | 49.99 USD | in_stock | 2026-10-01 | https://www.waveshare.com/st3235-servo.htm |

## FAQ

**What voltage powers the Waveshare ST3235 Servo 30 kg·cm 12 V?**

Supply range 6–12 V.

**How much does the Waveshare ST3235 Servo 30 kg·cm 12 V cost?**

From $49.99 at www.waveshare.com. Prices are observed unit prices before tax and shipping.

**What are the Waveshare ST3235 Servo 30 kg·cm 12 V dimensions?**

45.22 × 24.72 × 35 mm. A STEP model is available for enclosure fit checks.

**Where does this Waveshare ST3235 Servo 30 kg·cm 12 V data come from?**

Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.

## Sources

- [Waveshare ST3235 Servo 30 kg·cm 12 V datasheet](https://www.waveshare.com/st3235-servo.htm)
- [www.waveshare.com listing](https://www.waveshare.com/st3235-servo.htm)

## Part graph

### Alternatives (by use case)

- [ROBOTIS DYNAMIXEL XL330-M077-T](https://www.xirkit.io/products/robotis-dynamixel-xl330-m077-t-1a93) — Both serve robot joints and actuation — check the trade-offs; $27.49 vs $49.99
- [ROBOTIS DYNAMIXEL XL430-W250-T](https://www.xirkit.io/products/robotis-dynamixel-xl430-w250-t-7b7d) — Both serve robot joints and actuation — check the trade-offs; $49.99 vs $27.5
- [ROBOTIS DYNAMIXEL XL330-M288-T](https://www.xirkit.io/products/robotis-dynamixel-xl330-m288-t-db1e) — Both serve robot joints and actuation — check the trade-offs; $49.99 vs $27.49
- [M5Stack Roller485 BLDC Unit (U182)](https://www.xirkit.io/products/m5stack-roller485-bldc-unit-u182-5e1c) — Both serve robot joints and actuation — check the trade-offs; $36.95 vs $49.99
- [M5Stack RollerCAN BLDC Unit (U188)](https://www.xirkit.io/products/m5stack-rollercan-bldc-unit-u188-ced5) — Both serve robot joints and actuation — check the trade-offs; $43.9 vs $49.99