Futaba S.BUS Hi Voltage Servo .13sec/7.9kg 36g
Futaba S.BUS Hi Voltage Servo .13sec/7.9kg 36g
- Brand: Futaba
- MPN: Futaba S-U400
- Part #: RCTFTB0400
- UPC:
- Brand: Futaba
- MPN: Futaba S-U400
- Part #: RCTFTB0400
- UPC:
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Futaba S.BUS Hi Voltage Servo .13sec/7.9kg 36g
- Brand: Futaba
- MPN: Futaba S-U400
- Part #: RCTFTB0400

Product URL: https://www.pbtech.com/product/RCTFTB0400/Futaba-SBUS-Hi-Voltage-Servo-13sec79kg-36g
Features
High-Voltage Performance with Versatility
The Futaba S-U400 is a high-performance digital standard servo designed for high-voltage applications. Operating smoothly in a voltage range of 6.0-7.4V, with a peak tolerance of 8.4V, it offers excellent flexibility for a variety of RC models. Whether paired with an S.BUS/S.BUS2 system or a conventional PWM receiver, the S-U400 delivers reliable performance without compromise.
Speed and Torque for Precision Control
Engineered for both speed and strength, the S-U400 provides a quick 0.14 sec/60° rotation at 6.6V and an even faster 0.13 sec/60° at 7.4V. Coupled with a torque rating of 98.6 oz/in (7.1 kg-cm) at 6.6V and 109.7 oz/in (7.9 kg-cm) at 7.4V, it ensures responsive control and robust force for steering, throttle, or other demanding applications in RC vehicles, aircraft, or boats.
Durable Construction with Smooth Operation
Featuring ball bearings for reduced friction and enhanced smoothness, the S-U400 offers improved efficiency and longevity. Its plastic gear set provides a balance between weight savings and cost-effectiveness while still delivering dependable durability for standard RC applications. The 3-pole core motor ensures consistent operation with minimal noise and vibration.
Compact and Lightweight Design
With dimensions of 40 x 20 x 36.1 mm and a weight of just 1.38 oz, this servo maintains a compact form factor ideal for a wide range of RC setups. Despite its small size, it delivers high torque and fast response, making it suitable for hobbyists who require powerful performance without adding unnecessary weight to their models.
S.BUS2 Programmability for Customization
Fully S.BUS2 compatible, the S-U400 allows advanced users to program parameters such as end points, speed, and center position for maximum customization. This makes it an excellent choice for fine-tuning servo behavior to match specific model requirements, offering both beginner-friendly plug-and-play usability and advanced tuning capabilities for experienced RC enthusiasts.
Specifications
Servo Type
Digital Standard HV
Operating Voltage Range
6.0-7.4V (Peak 8.4V)
Speed @ 6.6V
0.14 sec/60°
Speed @ 7.4V
0.13 sec/60°
Torque @ 6.6V
98.6 oz/in (7.1 kg-cm)
Torque @ 7.4V
109.7 oz/in (7.9 kg-cm)
Gear Material
Plastic
Bearing Type
Ball bearings
Motor Type
3-pole core motor
Dimensions
40 x 20 x 36.1 mm
Weight
1.38 oz (39.1 g)
Spline
6 mm / 25T