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Technical Specifications
Last Updated: 2026-10-08
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | JRPS3421SA |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
65.00 oz-in
4.68 kg-cm
0.5 N-m
4.8V
50.00 oz-in
3.60 kg-cm
0.4 N-m
Average
|
| Speed |
6.0V
0.15 sec/60°
400.0 deg/s
66.7 RPM
4.8V
0.18 sec/60°
333.3 deg/s
55.6 RPM
Bottom 10%
|
| Physical | |
| Weight | 1.04 oz29.5 gBelow Average |
| Dimensions |
L 1.30 in W 0.58 in H 1.02 in L 33.0 mm W 14.7 mm H 25.9 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Hybrid |
| Gear Spline/Teeth | 23 T estimate |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Connectivity | |
| Connector | JR (Universal) |
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 | Average Stronger than 40% of 262 Digital Mini servos at 4.8V |
| Speed | Bottom 10% Faster than 10% of 263 Digital Mini servos at 4.8V |
| Weight | Below Average Lighter than 30% of 466 Digital Mini servos |
Performance Analysis
| Shaft Power | 0.51–0.80 W |
| Power Density | 1.042 W/in³ More power-dense than 20% of 440 Digital Mini servos |
| Torque Density | 1.6949 oz-in/g Stronger than 21% of 258 Digital Mini servos |
| Torque-to-Volume Ratio | 65.01 oz-in/in³ Denser torque than 37% of 262 Digital Mini servos |
| Speed-to-Weight | 0.18832 (1/sec·g) Faster than 12% of 259 Digital Mini servos |
| Speed-Torque Trade-off | 9.00 Better balanced than 60% of 261 Digital Mini servos |
| Torque Gain per Volt | 25.00%/V More voltage-responsive (torque) than 93% of 232 Digital Mini servos |
| Speed Gain per Volt | 16.68%/V More voltage-responsive (speed) than 55% of 235 Digital Mini servos |
| Voltage Range Width | 1.2 V Wider voltage range than 33% of 351 Digital Mini servos |
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Reviews (1)
-
Vixen
October 10, 2014Application(s): Sailplane Flaps + Elevator (3.0M to 3.8M wingspan). Throttle and Choke on a 42% IMAC airframe with 150cc gas motor
Comments: These are solid servos and what other manufacturers should use as a benchmark for servos in this class for both reliability and quiet performance. I use these on the flap and elevator surfaces on my 3.0M to 3.8M wingspan composite sailplanes as well as on my 42% IMAC planes for throttle and choke. Smooth consistent response from this servo.