Futaba
Futaba BLA1HD21 Industrial Servo

Manufacture: Futaba Corporation
Model: BLA1HD21
Features
The BLA1HD21 is an actuator (servo module) designed for use on the ailerons of small fixed-wing drones and small robots. The motor is a brushless type, improving durability. It is also compatible with Futaba’s proprietary S.BUS system, making it highly convenient.
Specification
Model name | BLA1HD21 |
---|---|
Rated voltage [V] | 7.4 |
Rated torque [N⋅m] | 0.07 |
Maximum torque (instantaneous) [N⋅m] | 0.75 |
No-load rotation speed [min-1] | 100 |
Case Material | Upper: Resin Middle: Resin Bottom: Resin |
Gear Material | 1st: Metal 2nd: Metal 3rd: Metal 4th: Metal Final: Metal |
Connection cable | Fixed unshielded cable |
Cable length [mm] | 300.0 |
Connector part | 3-pole connector |
Dimensions (W x L x H) [mm] | 33.0×15.0×27.1 |
Control and communication standards | PWM / S.BUS / S.BUS2 |
Operating temperature [℃] | -10 to +45 |
Weight [g] | 28.0 |
Specifications | ![]() |
Control and Communication Standards
Intended for connection to Futaba RC receivers and various other controllers, the controller supports the following standards:
・PWM: PWM signal used in conventional hobby RC servos
・S.BUS: Futaba’s proprietary serial communications protocol for hobby RC servos
Each communication format cannot be used simultaneously.