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Technical Specifications
Last Updated: 2026-10-08| Identity | |
| Brand |  |
| Product Number | EMX-SV-0289 |
| Category | Hobby |
| Performance | |
| Torque |
4.8V41.60 oz-in3.00 kg-cm0.3 N-mBelow Average |
| Speed |
4.8V0.05 sec/60°1,200.0 deg/s200.0 RPMTop 10% |
| Physical | |
| Weight | 0.95 oz27.0 gAverage |
| Dimensions |
L 1.376 in W 0.587 in H 1.185 in L 35.0 mm W 14.9 mm H 30.1 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Metal |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 60° |
| Pulse Cycle | 3 ms |
| Neutral Position | 1500 µs |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Connectivity | |
| Connector | JR (Universal) |
| 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 22% of 262 Digital Mini servos at 4.8V |
| Speed | Top 10% Faster than 99% of 263 Digital Mini servos at 4.8V |
| Weight | Average Lighter than 42% of 466 Digital Mini servos |
Performance Analysis
| Shaft Power | 1.54 W |
| Power Density | 1.607 W/in³ More power-dense than 51% of 440 Digital Mini servos |
| Torque Density | 1.5407 oz-in/g Stronger than 16% of 258 Digital Mini servos |
| Torque-to-Volume Ratio | 43.46 oz-in/in³ Denser torque than 15% of 262 Digital Mini servos |
| Speed-to-Weight | 0.74074 (1/sec·g) Faster than 95% of 259 Digital Mini servos |
| Speed-Torque Trade-off | 2.08 Better balanced than 4% of 261 Digital Mini servos |
| Voltage Range Width | 1.2 V Wider voltage range than 21% of 351 Digital Mini servos |
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Reviews (2)
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VD2021
January 28, 2015Application(s): 450SEV2 450Pro
Comments: I've had nothing but great results with this servo. I now have four that will be installed on a few different 450 size helis. Nice tolerances, no slop, verified the bearings and adequate grease. I also have the EMAX Servo programmer that I use to verify the parameters (haven’t changed anything from stock yet). The price has increased in the past few months and some venders are low or out of stock.
Egg Man
March 26, 2013Application(s): Rudder servo for 450 and 500 helicopter
Comments: Performs well enough but internal wiring and soldering is fragile with little solder and no glue over the solder joints anywhere. When I opened the bottom of the case after a few months before putting it on a beater 500 one of the wires to the motor fell off. (I believe this was just a ground wire, it was thinner than the other two wires, green rather than red and was attached to the motor case. In any case I resoldered it and put liquid electrical tape on all of the solder joints. I wouldn't trust it in a high vibration environment like a helicopter, without glue on the solder joints this servo is a ticking time bomb waiting to crash your aircraft.