Futaba RS403PR

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Product Number	FUTM0503
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V196.00 oz-inAverage
Speed	6.0V0.13 sec/60°Average
Physical
Weight	2.22 ozAverage
Dimensions	L 1.57 in W 0.79 in H 1.48 in
Case Material	Metal / Plastic
Drivetrain
Motor Type	Coreless
Gears	Metal
Gear Spline/Teeth	25 T estimate
Rotation Mode	Positional
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Rotational Range	180°
Pulse Cycle	14.25 ms
Pulse Width	920-2120 µs
Control System	PWM
Electrical & Environment
Operating Voltage	6–6 V
Connectivity
Connector	Futaba J

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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 44% of 1043 Digital Standard servos at 6.0V
Speed	Average Faster than 57% of 1041 Digital Standard servos at 6.0V
Weight	Average Lighter than 49% of 1902 Digital Standard servos

Performance Analysis

Shaft Power	2.79 W
Power Density	1.519 W/in³ More power-dense than 33% of 1759 Digital Standard servos
Torque Density	3.1111 oz-in/g Stronger than 44% of 1036 Digital Standard servos
Torque-to-Volume Ratio	106.78 oz-in/in³ Denser torque than 45% of 1042 Digital Standard servos
Speed-to-Weight	0.12210 (1/sec·g) Faster than 55% of 1033 Digital Standard servos
Speed-Torque Trade-off	25.48 Better balanced than 45% of 1031 Digital Standard servos
Voltage Range Width	0.0 V Wider voltage range than 2% of 1539 Digital Standard servos