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Technical Specifications
Last Updated: 2026-10-22
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | TS-THM989 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
319.40 oz-in
23.00 kg-cm
2.3 N-m
7.4V
291.60 oz-in
21.00 kg-cm
2.1 N-m
6.0V
250.00 oz-in
18.00 kg-cm
1.8 N-m
5.0V
208.30 oz-in
15.00 kg-cm
1.5 N-m
Top 10%
|
| Speed |
8.4V
0.07 sec/60°
857.1 deg/s
142.9 RPM
7.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
6.0V
0.09 sec/60°
666.7 deg/s
111.1 RPM
5.0V
0.10 sec/60°
600.0 deg/s
100.0 RPM
Average
|
| Stall Current | ≤2.6 A≤2600 mABelow Average |
| Physical | |
| Weight | 1.90 oz54.0 gBottom 10% |
| Dimensions |
L 1.378 in W 0.59 in H 1.339 in L 35.0 mm W 15.0 mm H 34.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Refresh Rate | 400 Hz |
| Angle Sensor | Magnetic Encoder |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 5–8.4 V |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 300 mm11.81 in |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Top 10% Stronger than 97% of 290 Digital Mini servos at 5.0V |
| Speed | Average Faster than 61% of 293 Digital Mini servos at 5.0V |
| Weight | Bottom 10% Lighter than 0% of 505 Digital Mini servos |
| Stall Current | Below Average Lower draw than 25% of 94 Digital Mini servos |
Performance Analysis
| Torque Density | 3.8574 oz-in/g Stronger than 89% of 286 Digital Mini servos |
| Torque-to-Volume Ratio | 191.41 oz-in/in³ Denser torque than 93% of 288 Digital Mini servos |
| Speed-to-Weight | 0.18519 (1/sec·g) Faster than 7% of 289 Digital Mini servos |
| Speed-Torque Trade-off | 20.83 Better balanced than 95% of 288 Digital Mini servos |
| Current-per-Torque Ratio | 0.0125 A/oz-in 2nd-highest current-per-torque ratio of 58 Digital Mini servos |
| Torque Gain per Volt | 15.69%/V More voltage-responsive (torque) than 42% of 257 Digital Mini servos |
| Speed Gain per Volt | 12.60%/V More voltage-responsive (speed) than 26% of 262 Digital Mini servos |
| Voltage Range Width | 3.4 V Wider voltage range than 67% of 405 Digital Mini servos |
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Reviews (1)
Includes 1 review aggregated from around the web.
There are very few reviews for this servo on the web. A German helicopter forum member using the sister THM988 model says the servos have been top so far, with very impressive resolution and repeatability in setup, but calls the companion app a flop.
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