Futaba S-A400 - S.Bus2 Coreless Digital Airplane Servo 01102403-3 (ONLINE ORDER ONLY)

Overview

The Futaba S-A400 is an S.Bus2 coreless digital airplane servo engineered to deliver precise, responsive control surface actuation for RC aircraft. Featuring coreless motor technology for smooth, efficient operation and S.Bus2 compatibility for ultra-fast digital response, this servo delivers 111.1 oz-in of torque at 7.4V with a rapid 0.08 sec/60° transit time.

Metal gears with ball bearings ensure durability and precise centering over many flight hours. The compact 1.59 × 0.79 × 1.0 inch form factor and lightweight 1.62 oz design make the S-A400 an excellent choice for medium-size RC aircraft where S.Bus2 signal fidelity directly impacts flight precision.

Key Features

• Coreless motor for smooth, efficient response
• S.Bus2 protocol for ultra-fast signal
• Metal gears with ball bearings
• High-voltage operation up to 7.4V
• Compact form factor (1.59 × 0.79 × 1.0 in)
• Lightweight design (1.62 oz)
• Fast 0.08 sec/60° response
• Strong 111.1 oz-in torque

Performance Benefits

• Ultra-fast S.Bus2 signal response
• Smooth coreless motor operation
• Precise, consistent centering
• Durable metal gear train
• Strong HV torque for control surfaces
• Long service life with ball bearings

Usage Notes

• Designed for RC airplanes and aircraft
• Ideal for aerobatic and sport flying
• Requires S.Bus2 compatible receiver
• Use with HV-capable power systems
• Mount securely in airframe

Technical Specs

• Dimensions: 1.59 × 0.79 × 1.0 in (40.4 × 20 × 25.4 mm)
• Weight: 1.62 oz (46 g)
• Speed @ 7.4V: 0.08 sec/60°
• Torque @ 7.4V: 111.1 oz-in (8.0 kgf·cm)
• Operating Voltage: Up to 7.4V (HV)
• Motor Type: Coreless
• Protocol: S.Bus2
• Gear Material: Metal with ball bearings
• Application: Aircraft

What's Included

• (1) Futaba S-A400 S.Bus2 Coreless Digital Airplane Servo

Summary

• S.Bus2 coreless digital airplane servo
• 111.1 oz-in torque, 0.08 sec/60° @ 7.4V
• Metal gears with ball bearings
• Smooth coreless motor performance
• Premium Futaba aircraft quality