Futaba S3157

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-09

Identity
Brand
Product Number	FUTM0657
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 24.00 oz-in 4.8V 21.00 oz-in Below Average
Speed	6.0V 0.09 sec/60° 4.8V 0.10 sec/60° Average
Physical
Weight	0.29 ozAbove Average
Dimensions	L 0.87 in W 0.43 in H 0.91 in
Drivetrain
Motor Type	3-pole
Gears	Plastic
Gear Spline/Teeth	21 T estimate
Control & Signal
Modulation	Digital
Neutral Position	1520 µs
Refresh Rate	200 Hz
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal)

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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	Below Average Stronger than 30% of 328 Digital Micro servos at 4.8V
Speed	Average Faster than 64% of 328 Digital Micro servos at 4.8V
Weight	Above Average Lighter than 67% of 620 Digital Micro servos

Performance Analysis

Shaft Power	0.39–0.49 W
Power Density	1.448 W/in³ More power-dense than 37% of 590 Digital Micro servos
Torque Density	2.5301 oz-in/g Stronger than 55% of 327 Digital Micro servos
Torque-to-Volume Ratio	61.69 oz-in/in³ Denser torque than 36% of 327 Digital Micro servos
Speed-to-Weight	1.20482 (1/sec·g) Faster than 77% of 327 Digital Micro servos
Speed-Torque Trade-off	2.10 Better balanced than 29% of 327 Digital Micro servos
Torque Gain per Volt	11.90%/V More voltage-responsive (torque) than 22% of 268 Digital Micro servos
Speed Gain per Volt	9.26%/V More voltage-responsive (speed) than 7% of 273 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 43% of 511 Digital Micro servos