# RobStride 03 QDD Actuator

> RobStride 03 is a 60 N·m peak quasi-direct-drive joint: 20 N·m rated (at 100 rpm) through a 9:1 reducer, 200 rpm no-load at 48 V, 13 A rated / 43 A peak phase current, 2.36 N·m/Arms torque constant, 14-bit absolute encoder, CAN 2.0 at 1 Mbps (RobStride, CANopen, MIT protocols). 24–60 V, 880 g, Ø98 flange × 56.6 mm.

- Manufacturer: RobStride
- Part number: RS03
- Category: Actuators
- Canonical page: https://www.xirkit.io/products/robstride-03-qdd-actuator-0910
- Pinout: https://www.xirkit.io/products/robstride-03-qdd-actuator-0910/pinout
- Structured JSON: https://www.xirkit.io/products/robstride-03-qdd-actuator-0910/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Actuator type | qdd |
| Gearbox | 9:1 |
| Rated torque | 20 N·m |
| Peak torque | 60 N·m |
| Rated speed | 100 rpm |
| No-load speed | 200 rpm |
| Rated voltage | 48 V |
| Rated current | 13 A |
| Torque constant Kt | 2.36 N·m/A |
| Encoder | 14-bit absolute |
| Control interface | CAN |
| Control modes | operation control (MIT-style), current, speed, position (PP), position (CSP) |
| Dimensions | 98 × 98 × 56.6 mm |
| Operating temperature | -20 to 50 °C |

## Pinout (4 pins, 0 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| VBAT+ | XT30APW-M | power in | — | power_in | — | — | — | — | — | — | — |
| GND | XT30APW-M | ground | — | ground | — | — | — | — | — | — | — |
| CAN-L | GH1.25-2PWT | signal | — | can-l | — | — | — | — | — | — | — |
| CAN-H | GH1.25-2PWT | signal | — | can-h | — | — | — | — | — | — | — |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.roboticscenter.ai | 245 USD | preorder | 2026-10-17 | https://www.roboticscenter.ai/store/product/robstride-03 |

## FAQ

**How much does the RobStride 03 QDD Actuator cost?**

From $245 at www.roboticscenter.ai. Prices are observed unit prices before tax and shipping.

**What are the RobStride 03 QDD Actuator dimensions?**

98 × 98 × 56.6 mm. A STEP model is available for enclosure fit checks.

**Where does this RobStride 03 QDD Actuator 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

- [RobStride 03 QDD Actuator datasheet](https://raw.githubusercontent.com/RobStride/Product_Information/main/Product%20Literature/CAN2.0/RS03/RS03User%20Manual261013.pdf)
- [www.roboticscenter.ai listing](https://www.roboticscenter.ai/store/product/robstride-03)

## Part graph

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