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Blue Bird BMS-A12H
Micro

Blue Bird BMS-A12H

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-10-10
Identity
Brand Blue Bird
Category Hobby
Performance
Torque
8.4V 63.89 oz-in
7.4V 58.34 oz-in
6.0V 51.39 oz-in
3.7V 31.95 oz-in
Speed
8.4V 0.09 sec/60°
7.4V 0.10 sec/60°
6.0V 0.12 sec/60°
3.7V 0.19 sec/60°
Physical
Weight 0.30 ozAbove Average
Dimensions L 0.866 in
W 0.315 in
H 0.76 in
Case Material Aluminum
Drivetrain
Motor Type Coreless
Gears Stainless Steel
Gear Spline/Teeth 19 T
Rotation Mode Positional
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Direction Clockwise
Rotational Range 90°
Mechanical Limit 90°
Pulse Cycle 3 ms
Pulse Width 1100-1900 µs
Neutral Position 1500 µs
Dead Band 2 µs
Refresh Rate 333 Hz
Control System PWM
Electrical & Environment
Operating Voltage 3.6–8.4 V
Power Source 2S Li-Po / 2S Li-Fe
Connectivity
Connector JR (Universal)
Wire Length 150 mm
Origin
Country of Origin Taiwan

Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Class Comparison

WeightAbove Average
Lighter than 67% of 620 Digital Micro servos

Performance Analysis

Shaft Power 0.31–1.31 W
Power Density6.331 W/in³
More power-dense than 86% of 590 Digital Micro servos
Torque Density3.8036 oz-in/g
Torque-to-Volume Ratio154.11 oz-in/in³
Speed-to-Weight0.62657 (1/sec·g)
Speed-Torque Trade-off6.07
Voltage Range Width4.8 V
Wider voltage range than 97% of 511 Digital Micro servos
Dead-Band-to-Pulse-Width Ratio0.0025
Finer dead band than 16% of 189 Digital Micro servos

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