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Technical Specifications
Last Updated: 2026-09-14Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
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| Identity | |
| Brand |  |
| Product Number | 37950S |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
7.4V
486.00 oz-in
35.00 kg-cm
3.4 N-m
6.0V
403.00 oz-in
29.02 kg-cm
2.8 N-m
|
| Speed |
7.4V
0.14 sec/60°
428.6 deg/s
71.4 RPM
6.0V
0.17 sec/60°
352.9 deg/s
58.8 RPM
|
| Running Current | (add) |
| Stall Current | 4.8–6.2 A4800–6200 mA |
| Physical | |
| Weight | 2.29 oz64.9 g |
| Dimensions |
L 1.57 in W 0.79 in H 1.50 in L 39.9 mm W 20.1 mm H 38.1 mm |
| Case Material | Plastic / Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | MOS |
| Gears | Titanium |
| Gear Spline/Teeth | 24 T estimate |
| Shaft Size | 5.8 mm |
| Rotation Mode | (add) |
| Rotation/Support | Dual Bearings |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 180° |
| Mechanical Limit | (add) |
| Pulse Cycle | 20 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 1 µs |
| Refresh Rate | (add) |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Signal Voltage | 3-5V |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Power Source | 2S LiPo |
| Regulator Type | (add) |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | IP54 |
| Certification | (add) |
| Idle Current | 0.010 A10 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 in |
| Origin | |
| Country of Origin | (add) |
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.
Performance Analysis
| Shaft Power | 4.38–6.42 W |
| Torque Density | 6.2096 oz-in/g Stronger than 88% of the 831 Digital Standard servos in the database |
| Torque-to-Volume Ratio | 216.61 oz-in/in³ Denser torque than 86% of the 842 Digital Standard servos in the database |
| Power Density | 3.450 W/in³ More power-dense than 65% of the 1643 Digital Standard servos in the database |
| Speed-to-Weight | 0.09064 (1/sec·g) Faster than 23% of the 820 Digital Standard servos in the database |
| Speed-Torque Trade-off | 68.52 Better balanced than 88% of the 825 Digital Standard servos in the database |
| Current-per-Torque Ratio | 0.0154 A/oz-in More efficient than 51% of the 230 Digital Standard servos in the database |
| Torque Gain per Volt | 14.71%/V More voltage-responsive (torque) than 41% of the 672 Digital Standard servos in the database |
| Speed Gain per Volt | 15.32%/V More voltage-responsive (speed) than 51% of the 686 Digital Standard servos in the database |
| Voltage Range Width | 1.4 V Wider voltage range than 38% of the 1268 Digital Standard servos in the database |
| Dead-Band-to-Pulse-Width Ratio | 0.0008 Finer dead band than 94% of the 326 Digital Standard servos in the database |
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Reviews (2)
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ZaneT
June 5, 2015Application(s): HB VE8 Buggy
Comments: Can not beat this servo killer power and speed have had this servo a 1 1/2 and it finally failed but 10min on the phone with them sent it in cost me 6.00 usd for a brand new one that was shipping and it was my fault it went out so I cant blame them and they took care of me on it love the company and their products
Savageasflux
March 5, 2015Application(s): RC8Te for steering. Castle Mamba Monster Maxx ESC with extra caps and 1515 2200kv motor, running 5s 45C nanotech lipo with Castle BEC at 7.4v.
Comments: Fast enough and very strong, run it on a BEC and its awesome when you can control everything. Doesnt buzz holding steering very much like some other brand servos i've had. With the titanium gears it holds up to a lot of abuse that I put on the RC8Te front end steering setup with tight servo saver and lots of huge 20ft+ jumps, heavy bashing, multiple backflips, and lots of crashes. It costs a considerable amount, I got it for $125 new, but is well worth it and my most expensive Hitec servo so far. Had this servo for over 2 years, never failed me yet. I have lots of Hitecs in 1/5 and 1/8, cant complain about any! Heard they have great support and warranty, but ive never needed it. I use the Hitec Hpp-21, its a great programmer and tester for this servo when connected to my PC.