# DDSM400 Direct Drive Servo Motor

**Type:** Product page · **SKU:** WS-28626 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/ddsm400-direct-drive-servo-motor-robotics-rc.html ([markdown](https://core-electronics.com.au/ddsm400-direct-drive-servo-motor-robotics-rc.html.md))

DDSM400 Direct Drive Servo Motor, Wide Speed Range Adjustable, Low Noise, All-In-One Design, Hub Motor, Supports Suspension Installation, Suitable For RC...

## Pricing

- **Price:** $47.70 (inc GST) — $43.36 AUD, exc GST
- **Quantity discounts:** 10+ $41.63 (exc GST) · 25+ $40.33 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 31.

## Description

The DDSM400 Direct Drive Servo Motor is a versatile, low-noise, all-in-one hub motor designed for RC cars, robot DIY projects, and other applications requiring precision and reliability. This advanced motor integrates cutting-edge direct drive technology, eliminating the need for a traditional reducer, resulting in enhanced efficiency, compactness, and performance.

![DDSM400 servo motor, overall appearance](https://core-electronics.com.au/attachments/localcontent/DDSM400-details-1_16909bf8cfb.jpg)

### All-in-One Robot Joint

The DDSM400 features a high-reliability Permanent Magnet Synchronous Motor (PMSM) that integrates an outer rotor brushless motor, encoder, and servo. This combination delivers unparalleled precision and performance for robotics applications.

![DDSM400 servo motor usage demo, installing on the robot chassis](https://core-electronics.com.au/attachments/localcontent/DDSM400-details-5_15846504e1a.jpg)

### Features at a Glance

- Ultra-low noise
- High precision and zero-backlash
- Fast response with direct drive technology
- Compact structure and high integration
- Supports LIN bus communication
- Provides feedback on position, speed, current, and error codes
- Features Hall position detection and over-current protection
- Supports electric braking
- Drive efficiency close to 99.99% due to no mechanical friction
 
### Specifications

 | **No-load speed** | 400 ±20 RPM | **Operating temperature** | -5°C ~ 40°C |
|---|---|---|---|
| **No-load current** | 0.25A | **Total weight** | 236g |
| **Rated speed** | 100 RPM | **Encoder resolution** | 12-bit |
| **Rated torque** | 0.15 Nm | **Rated current** | 0.24 ±0.07 A |
| **Locked-rotor torque** | 0.3 Nm | **Noise level** | ≤40 dB(A) |
| **Torque constant** | 0.3 Nm/A | **Input voltage** | 25.2V DC |

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/W/S/WS-28626-1.jpg)