Futaba
Futaba BLA1HH Series Industrial Servo

Manufacture: Futaba Corporation
Model: BLA1HH Series: BLA1HH21; BLA1HH41; BLA1HH42; BLA1HH51
Features
The BLA1HH series is an actuator (servo module) designed for use on the ailerons of medium-sized fixed-wing drones and small robots, and is dustproof and waterproof (IP64) compliant. It uses a brushless motor for improved durability. It’s also compatible with Futaba’s proprietary S.BUS system, offering great convenience.
Specification
Model name | BLA1HH21 | BLA1HH41 | BLA1HH42 | BLA1HH51 |
---|---|---|---|---|
Rated voltage [V] | 7.4 | 14.8 | 28.0 | |
Rated torque [N⋅m] | 0.73 | 0.86 | 0.47 | 0.84 |
Maximum torque (instantaneous) [N⋅m] | 3.63 | 4.32 | 2.35 | 4.20 |
No-load rotation speed [min-1] | 91 | 100 | 200 | 91 |
Dustproof/waterproof structure | IP64 | |||
Case Material | Upper: Aluminum Middle: Aluminum Bottom: Aluminum | |||
Gear Material | 1st: Metal 2nd: Metal 3rd: Metal Final: Metal | |||
Connection cable | Fixed shielded cable | |||
Cable length [mm] | 400.0 | |||
Connector part | 4-pole connector | 6-pole connector | ||
Dimensions (W x L x H) [mm] | 40.5×21.0×38.4 | |||
Control and communication standards | PWM / S.BUS / S.BUS2 | |||
Operating temperature [℃] | -30 to +70 | |||
Weight [g] | 87.0 | 100.0 | ||
Position Feedback | none | Yes |
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.
Position Feedback:
The output voltage changes according to the angle of the output shaft. The angle can be constantly monitored while power is applied.