Overview
TLIBOT TSJA20 is a compact Robot Motor designed for high-torque robotic joints. It integrates a harmonic reducer, dual high-resolution encoders, and a geared electromagnetic brake in a lightweight package, enabling precise motion control and continuous rotation for advanced robotic systems.
The module supports industrial fieldbuses (Ethercat/CAN/CAN FD), offers 48 V operation with 160 rated power, and delivers repeatable positioning of 1′. Encoder architecture is battery-less for both output and input sides, simplifying maintenance and integration.
Key Features
- Harmonic reduction ratio options: 50 / 80 / 100 / 120
- Integrated gear-meshed electromagnetic brake
- Battery-less 19bit single-turn output encoder and 19bit ST input encoder (multi-turn via output)
- Industrial fieldbus support: Ethercat/CAN/CAN FD
- IP54-rated joint structure and continuous 360° rotation (as shown in product materials)
- Axial installation to the robot shell illustrated for fast integration
- Lightweight design at 0.98 Kg
Specifications
| Parameter | Value |
|---|---|
| Harmonic reduction ratio | 50 / 80 / 100 / 120 |
| Rated torque (Nm) | 33 / 43 / 52 / 52 |
| Peak torque for start and stop is allowed (Nm) | 73 / 96 / 107 / 113 |
| The maximum allowable average load torque (Nm) | 44 / 61 / 63 / 63 |
| Instantaneous Allowable Maximum Torque (Nm) | 127 / 165 / 189 / 189 |
| Maximum rotational speed at the output end (RPM) | 60 / 37.5 / 30 / 25 |
| Repeat positioning accuracy | 1′ |
| Rated speed of the motor (RPM) | 3000 |
| Peak instantaneous motor speed (RPM) | 3500 |
| Motor rated power | 160 |
| Rated voltage (V) | 48 |
| Weight (Kg) | 0.98 |
| Output encoder resolution | 19bit single-turn abs. (battery-less) |
| Input encoder resolution | 19bit ST abs. (multi-turn via output, battery-less) |
| Fieldbus | Ethercat/CAN/CAN FD |
| Integrated brake | Gear-meshed electromagnetic brake |
Applications
- Humanoid Robots
- Robotic Arms
- Exoskeletons
- Quadruped Robots
- AGV Vehicles
- ARU Robots
For pre-sales and technical support, contact support@rcdrone.top or visit https://rcdrone.top/.
Manuals
- Serial Communication Specification (PDF)
- ULTRA-LIGHTWEIGHT JOINT MODULE CATALOGUE (PDF)
- TSJA45 Installation Illustration (PDF)
Details

TSJ series model codes indicate joint specifications: installation, model, ratio, brake, encoder, protocol, and adapter. Example: TSJA17-100BTE means axial mount, model 17, 100:1 ratio, brake, dual encoder, EtherCAT, with cover.

Tlibot collaborative robots feature highly integrated joints with IP54 rating, 360° rotation, 5-10kg payload, 500-1000mm reach, and >1:1 payload-to-weight ratio.

Installation guide for Tlibot Tsja20 Motor joint connection with recommended screws and adapter.
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