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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
Speed
7.4V 0.13 sec/60°
6.6V 0.14 sec/60°
Running Current (add)
Stall Current (add)
Physical
Weight 1.38 oz
Dimensions L 1.59 in
W 0.79 in
H 1.50 in
Case Material Plastic
Drivetrain
Motor Type 3-pole
Motor Drive (add)
Gears Plastic
Gear Spline/Teeth 25 T
Shaft Size (add)
Rotation Mode Positional
Rotation/Support (add)
Backlash (add)
Control & Signal
Modulation Digital
Direction (add)
Rotational Range (add)
Mechanical Limit (add)
Pulse Cycle (add)
Pulse Width (add)
Neutral Position (add)
Dead Band (add)
Refresh Rate (add)
Angle Sensor Potentiometer
Control System SBUS2
Programmable Yes
Signal Voltage (add)
Electrical & Environment
Operating Voltage 6.6–7.4 V
Power Source (add)
Regulator Type (add)
Temperature (add)
Water Rating (add)
Certification (add)
Idle Current (add)
Connectivity
Connector Futaba J
Wire Length (add)
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 1.30–1.56 W
Torque Density2.5282 oz-in/g
Stronger than 36% of the 831 Digital Standard servos in the database
Torque-to-Volume Ratio52.23 oz-in/in³
Denser torque than 18% of the 842 Digital Standard servos in the database
Power Density0.827 W/in³
More power-dense than 14% of the 1643 Digital Standard servos in the database
Speed-to-Weight0.18315 (1/sec·g)
Faster than 80% of the 820 Digital Standard servos in the database
Speed-Torque Trade-off13.80
Better balanced than 25% of the 825 Digital Standard servos in the database
Torque Gain per Volt14.07%/V
More voltage-responsive (torque) than 38% of the 672 Digital Standard servos in the database
Speed Gain per Volt9.60%/V
More voltage-responsive (speed) than 15% of the 686 Digital Standard servos in the database
Voltage Range Width0.8 V
Wider voltage range than 3% of the 1268 Digital Standard servos in the database

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