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Futaba S-U400
Standard

Futaba S-U400

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-09-16
Identity
Brand Futaba
Product Number 01102333-3
Category Hobby
Performance
Torque
7.4V 109.70 oz-in
6.6V 98.60 oz-in Below Average
Speed
7.4V 0.13 sec/60°
6.6V 0.14 sec/60° Average
Physical
Weight 1.38 ozTop 10%
Dimensions L 1.591 in
W 0.791 in
H 1.50 in
Case Material Plastic
Drivetrain
Motor Type 3-pole
Gears Plastic
Gear Spline/Teeth 25 T
Rotation Mode Positional
Control & Signal
Modulation Digital
Angle Sensor Potentiometer
Control System SBUS2
Programmable Yes
Electrical & Environment
Operating Voltage 6.6–7.4 V
Connectivity
Connector Futaba J

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

TorqueBelow Average
Stronger than 18% of 1055 Digital Standard servos at 6.6V
SpeedAverage
Faster than 52% of 1038 Digital Standard servos at 6.6V
WeightTop 10%
Lighter than 96% of 1872 Digital Standard servos

Performance Analysis

Shaft Power 1.30–1.56 W
Power Density0.827 W/in³
More power-dense than 13% of 1762 Digital Standard servos
Torque Density2.5282 oz-in/g
Stronger than 32% of 1048 Digital Standard servos
Torque-to-Volume Ratio52.23 oz-in/in³
Denser torque than 16% of 1053 Digital Standard servos
Speed-to-Weight0.18315 (1/sec·g)
Faster than 84% of 1031 Digital Standard servos
Speed-Torque Trade-off13.80
Better balanced than 21% of 1029 Digital Standard servos
Torque Gain per Volt14.07%/V
More voltage-responsive (torque) than 40% of 868 Digital Standard servos
Speed Gain per Volt9.60%/V
More voltage-responsive (speed) than 14% of 868 Digital Standard servos
Voltage Range Width0.8 V
Wider voltage range than 2% of 1552 Digital Standard servos

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Reviews (1)

Includes 1 review aggregated from around the web.

Retailers give it strong ratings, and users value the Futaba reliability in cars, boats and sport planes. The resin gears limit shock strength.

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