When your airframe demands maximum torque, blinding speed, and the ability to run directly off a 3S LiPo without voltage regulation, the KST SV15-12 Super High-Voltage mini coreless digital servo is the answer. Delivering 20.0 kgf.cm at 13V and a 0.10s/60° no-load response in a compact 35g package, it brings professional-grade cyclic precision and tail authority to RC helicopters, industrial-grade UAV control surfaces, and high-torque robotics applications where every gram and millisecond counts.

Key Features

• Super High-Voltage (SHV) Direct Drive: Native 8.4V–13.0V operation supports 3S LiPo direct connection — eliminating voltage regulators, reducing weight, and simplifying wiring.
• High-Performance Coreless Motor: Delivers instant linear response, ultra-low latency cyclic control, and smooth torque across the full travel range with minimal deadband.
• 20.0 kgf.cm Peak Torque: Class-leading stall torque at 13V provides exceptional cyclic authority and tail hold under aggressive 3D maneuvers and high-disc-loading conditions.
• Hardened Steel Geartrain: Precision-cut steel gears with dual ball bearing output shaft support deliver zero-backlash control and long-term durability under sustained high-load operation.
• Full CNC Aluminum Casing: Machined alloy housing provides maximum structural rigidity, precise servo bay fitment, and rapid heat dissipation during extended high-current operation.
• Programmable & Soft Start: Configurable travel limits and soft-start protection for safe power-up and precise control surface tuning across helicopter, UAV, and robotics platforms.
• Wide Application Range: Engineered for RC helicopters, industrial UAVs, and robotic actuator applications requiring compact high-torque servo solutions.

Technical Specifications

• Model: SV15-12 SHV Mini Coreless Digital Servo
• Rated Voltage: DC 12.0V
• Voltage Range: DC 8.4V – 13.0V (3S LiPo compatible)
• Motor Type: Coreless DC Motor
• Gear Set Material: Hardened Steel
• Case Material: CNC Aluminum Alloy
• Bearings: Dual Ball Bearings (2BB)
• Position Sensor: Potentiometer
• Working Frequency: 1520μs / 333Hz
• Default Travel Angle: ±60° (120° Total)
• Operating Temperature: -10°C to +65°C
• Soft Start / Programmability: Yes (Programmable)
• Dimensions: 33.0 × 15.0 × 30.0 mm (±0.2mm)
• Weight: 35g (±10%)

Performance Ratings

• Stall Torque:
  • 15.0 kgf.cm @ 8.4V
  • 18.0 kgf.cm @ 12.0V
  • 20.0 kgf.cm @ 13.0V
• Operating Speed (No-Load):
  • 0.15 sec/60° @ 8.4V
  • 0.11 sec/60° @ 12.0V
  • 0.10 sec/60° @ 13.0V
• Start Current:
  • 1.50A @ 8.4V
  • 2.08A @ 12.0V
  • 2.25A @ 13.0V

Dimensions & Sizing

Documentation

• SV15-12 Technical Specification