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

Precise and dependable: Futaba S-U400 for RC builds

The Futaba S-U400 standard servo gives hobbyists a dependable mix of speed and strength. With a 0.13sec response time and 7.9kg of torque, this compact 36g unit suits many RC roles, from steering duties to throttle and brake control. It balances quick inputs with solid holding power so your setup responds consistently on track or at the trackside practice session.

How the S-U400 sharpens handling

A good servo converts stick inputs into clean motion, and the S-U400 does that without fuss. Its combination of fast actuation and steady torque helps reduce overcorrection and improves steering precision. That makes it a practical upgrade for on-road cars and tight-handling buggies where predictable feedback matters.

Real world performance: speed paired with torque

The 0.13sec speed delivers snappy corrections when you need them, while the 7.9kg torque keeps linkages under control during heavy loads. At just 36 grams the unit adds minimal weight, preserving balance and traction. Use it where crisp steering or reliable servo power is required without bulk.

Setup and maintenance tips for best results

Calibrate endpoints and centering during initial setup to avoid binding. Check the servo horn and linkages periodically for play or wear, and pair the S-U400 with a solid receiver and power source to avoid voltage sag. Regular inspection helps maintain accuracy and prolong service life.

The Futaba S-U400 is a practical, well balanced standard servo for RC enthusiasts who want reliable response and enough torque for demanding steering tasks. Its lightweight construction keeps handling sharp while providing the power needed in competitive or club environments.