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Technical Specifications
Last Updated: 2026-09-29| Identity | |
| Brand |  |
| Product Number | SM-S2309S |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
16.70 oz-in
1.20 kg-cm
0.1 N-m
4.8V
13.90 oz-in
1.00 kg-cm
0.1 N-m
Below Average
|
| Speed |
6.0V
0.10 sec/60°
600.0 deg/s
100.0 RPM
4.8V
0.12 sec/60°
500.0 deg/s
83.3 RPM
Average
|
| Running Current |
6.0V
0.340 A
340 mA
4.8V
0.240 A
240 mA
Below Average
|
| Stall Current | 0.8–1 A800–1000 mABelow Average |
| Physical | |
| Weight | 0.35 oz9.9 gBelow Average |
| Dimensions |
L 0.901 in W 0.484 in H 0.874 in L 22.9 mm W 12.3 mm H 22.2 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Brushed |
| Motor Drive | PWM |
| Gears | Plastic |
| Gear Spline/Teeth | 24 T |
| Rotation Mode | Positional |
| Rotation/Support | Bushing |
| Backlash | 1.500° |
| Control & Signal | |
| Modulation | Analog |
| Direction | Clockwise |
| Rotational Range | 180° |
| Mechanical Limit | 180° |
| Pulse Cycle | 20 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 10 µs |
| Refresh Rate | 50 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Signal Voltage | 3.3-5V |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Power Source | External |
| Regulator Type | None |
| Temperature | -20–65 °C-4–149 °F |
| Water Rating | None |
| Certification | CE | ROHS |
| Idle Current | 0.004 A4 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 200 mm7.87 in |
| Origin | |
| Country of Origin | China |
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 | Below Average Stronger than 21% of 160 Analog Micro servos at 4.8V |
| Speed | Average Faster than 56% of 160 Analog Micro servos at 4.8V |
| Weight | Below Average Lighter than 33% of 336 Analog Micro servos |
| Running Current | Below Average Lower draw than 23% of 31 Analog Micro servos at 4.8V |
| Stall Current | Below Average Lower draw than 26% of 48 Analog Micro servos |
Performance Analysis
| Shaft Power | 0.21–0.31 W |
| Power Density | 0.810 W/in³ More power-dense than 44% of 322 Analog Micro servos |
| Torque Density | 1.4040 oz-in/g Stronger than 11% of 160 Analog Micro servos |
| Torque-to-Volume Ratio | 36.47 oz-in/in³ Denser torque than 21% of 160 Analog Micro servos |
| Speed-to-Weight | 0.84175 (1/sec·g) Faster than 44% of 160 Analog Micro servos |
| Speed-Torque Trade-off | 1.67 Better balanced than 22% of 159 Analog Micro servos |
| Current-per-Torque Ratio | 0.0719 A/oz-in More efficient than 8% of 38 Analog Micro servos |
| Idle-to-Running Current Ratio | 0.017 1st-highest idle-to-running current ratio of 24 Analog Micro servos |
| No-Load vs Stall Current Spread | 4.17 Narrower current spread than 45% of 23 Analog Micro servos |
| Torque Gain per Volt | 16.79%/V More voltage-responsive (torque) than 58% of 101 Analog Micro servos |
| Speed Gain per Volt | 16.67%/V More voltage-responsive (speed) than 52% of 101 Analog Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 51% of 174 Analog Micro servos |
| Backlash-to-Range Ratio | 0.00833 Tighter backlash than 5% of 106 Hobby servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0083 Finer dead band than 12% of 42 Analog Micro servos |
Similar Active Servos
Reviews (12)
Includes 2 reviews aggregated from around the web.
Retail review coverage is very thin, so most feedback comes from beginners using the Arduino Starter Kit. Users find it easy to drive with standard servo libraries. A common surprise is that real travel is noticeably less than the 180 degrees stated in kit materials, and it hums or buzzes at the extremes. Beginners often see it not moving or jittering because of USB power limits, a missing common ground or loose breadboard connections. It may not run reliably from 3V boards. Some owners report it dying after light use.
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Perrycream
January 1, 2025Application(s): ailerons, ruder, and elevators for model airplane
Comments: Very smooth running servo. Good for a small airplanes. Tested against other brands with full sweep left and right. Movement is opposite SG90 servo.
Salma
November 19, 2024Application(s): SM-S2309S
Comments: It's a decent servo for the price
MR cheese
June 19, 2024Application(s): arduino
Comments: so to the people who have the issue that the degree is kinda of, its the potentiometer not being properly connected
MR cheese
June 19, 2024Application(s): arduino
Comments: so to the people who have the issue that the degree is kinda of, its the potentiometer not being properly connected
Foxique
July 28, 2022Application(s): Was used to test with arduino and as a power generator.
Comments: It works great but, the gears break and sometimes the whole gear system get stuck.
Nathan
May 30, 2022Application(s): Robotic hand test servo
Comments: Only has 1-2 degrees of rotation. This is the first time it has been used.
willgo
November 17, 2020Application(s): Learning Arduino
Comments: Came with the kit. It wouldn't quite get to the final position for any setting (1 or 2 degrees short each time). As a result it kept trying, causing a lot of vibration.
pflagerd
August 13, 2020Application(s): The one that came with the Arduino Starter Kit [K000007] was DOA. I replaced it with some generic SG90s which worked fine.
Comments: The one that came with the Arduino Starter Kit [K000007] was DOA. I replaced it with some generic SG90s which worked fine.
volare
November 13, 2019Application(s): RC Boat
Comments: Good servo
RROCCHIA
May 13, 2017Application(s): OK
Comments: OK