Futaba S-U400 Standard Servo (ERP) Compact 36g - 0.13sec / 7.9kg  [FP-S-U400]

Compact performance from the Futaba S-U400

The Futaba S-U400 standard servo packs fast responses and solid torque into a lightweight 36g frame. With a 0.13sec speed rating and 7.9kg of torque, it works well for steering, throttle, or smaller-scale control tasks. Its design keeps weight low while delivering dependable actuation for club racing and weekend track sessions.

Why this servo is useful for racers and tinkerers

The S-U400 gives a reliable balance between speed and holding power, making set up adjustments more predictable. Whether refining steering feel or fitting into a tight chassis, the servo's compact footprint and performance credentials make it a versatile option for upgrades.

On-track performance: speed you can trust

A 0.13sec movement time gives immediate input feedback, and the 7.9kg torque keeps linkages steady under load. At 36 grams the servo contributes little to the car's mass, helping maintain traction and agility in dynamic driving situations.

Installation hints and care

Secure the unit with correct mounting screws, confirm endpoint and neutral settings in your transmitter, and check linkage geometry to avoid binding. Regular cleaning and inspection of the output horn will keep the S-U400 operating smoothly.

The Futaba S-U400 serves as a dependable, lightweight standard servo option for racers and hobbyists seeking consistent control. Its mix of speed and torque fits a wide range of RC applications.