Blue Bird BMS-303DD

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 14.00 oz-in 4.8V 11.00 oz-in Average
Speed	6.0V 0.09 sec/60° 4.8V 0.11 sec/60° Average
Physical
Weight	0.13 ozAverage
Dimensions	L 0.75 in W 0.29 in H 0.61 in
Drivetrain
Motor Type	Coreless
Gears	Plastic
Gear Spline/Teeth	25 T estimate
Control & Signal
Modulation	Analog
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal) estimate

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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.

Compatible Hardware

Amazon eBay

*Spec is estimated from brand data.

Class Comparison

Torque	Average Stronger than 57% of 29 Nano servos at 4.8V
Speed	Average Faster than 39% of 29 Nano servos at 4.8V
Weight	Average Lighter than 58% of 27 Analog Nano servos

Performance Analysis

Shaft Power	0.18–0.29 W
Power Density	2.168 W/in³ 4th-highest power density of 27 Analog Nano servos
Torque Density	2.9730 oz-in/g Stronger than 76% of 30 Blue Bird servos
Torque-to-Volume Ratio	82.91 oz-in/in³ Denser torque than 59% of 30 Blue Bird servos
Speed-to-Weight	2.45700 (1/sec·g) 4th-highest speed-to-weight of 30 Blue Bird servos
Speed-Torque Trade-off	1.21 Better balanced than 13% of 31 Blue Bird servos
Torque Gain per Volt	22.73%/V 4th-highest torque gain per volt of 23 Blue Bird servos
Speed Gain per Volt	18.52%/V More voltage-responsive (speed) than 50% of 23 Blue Bird servos
Voltage Range Width	1.2 V Wider voltage range than 14% of 160 Blue Bird servos