Blue Bird BMS-303

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-08

Identity
Brand
Product Number	BMS-303
Category	Hobby
Discontinued	Yes
Performance
Torque	4.8V9.91 oz-inAverage
Speed	4.8V0.11 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	4.8–4.8 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 39% of 29 Nano servos at 4.8V
Speed	Average Faster than 43% of 29 Nano servos at 4.8V
Weight	Average Lighter than 62% of 27 Analog Nano servos

Performance Analysis

Shaft Power	0.17 W
Power Density	1.256 W/in³ More power-dense than 62% of 27 Analog Nano servos
Torque Density	2.6784 oz-in/g Stronger than 59% of 30 Blue Bird servos
Torque-to-Volume Ratio	74.69 oz-in/in³ Denser torque than 41% of 30 Blue Bird servos
Speed-to-Weight	2.45700 (1/sec·g) 3rd-highest speed-to-weight of 30 Blue Bird servos
Speed-Torque Trade-off	1.09 Better balanced than 7% of 31 Blue Bird servos
Voltage Range Width	0.0 V Wider voltage range than 0% of 160 Blue Bird servos