FeeTech FS4351M

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Product Number	FS4351M
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 59.80 oz-in 4.8V 48.70 oz-in Average
Speed	6.0V 0.06 sec/60° 4.8V 0.08 sec/60° Above Average
Physical
Weight	1.06 ozBelow Average
Dimensions	L 1.394 in W 0.594 in H 1.189 in
Drivetrain
Motor Type	Coreless
Gears	Metal
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Rotational Range	120°
Pulse Width	900-2100 µs
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal) estimate
Origin
Country of Origin	China

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Average Stronger than 38% of 262 Digital Mini servos at 4.8V
Speed	Above Average Faster than 86% of 263 Digital Mini servos at 4.8V
Weight	Below Average Lighter than 27% of 466 Digital Mini servos

Performance Analysis

Shaft Power	1.13–1.84 W
Power Density	1.872 W/in³ More power-dense than 59% of 440 Digital Mini servos
Torque Density	1.6233 oz-in/g Stronger than 18% of 258 Digital Mini servos
Torque-to-Volume Ratio	49.47 oz-in/in³ Denser torque than 20% of 262 Digital Mini servos
Speed-to-Weight	0.41667 (1/sec·g) Faster than 67% of 259 Digital Mini servos
Speed-Torque Trade-off	3.90 Better balanced than 21% of 261 Digital Mini servos
Torque Gain per Volt	18.99%/V More voltage-responsive (torque) than 68% of 232 Digital Mini servos
Speed Gain per Volt	27.78%/V More voltage-responsive (speed) than 95% of 235 Digital Mini servos
Voltage Range Width	1.2 V Wider voltage range than 20% of 351 Digital Mini servos