Hitec HS-8381TH

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-26

Identity
Brand
Product Number	38381
Category	Hobby
Discontinued	Yes
Performance
Torque	7.4V 486.00 oz-in 6.0V 403.00 oz-in Above Average
Speed	7.4V 0.13 sec/60° 6.0V 0.15 sec/60° Average
Physical
Weight	2.40 ozAverage
Dimensions	L 1.57 in W 0.79 in H 1.50 in
Case Material	Aluminum
Drivetrain
Motor Type	Coreless
Motor Drive	FET
Gears	Titanium
Gear Spline/Teeth	25 T
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Neutral Position	1500 µs
Control System	PWM
Programmable	No
Electrical & Environment
Operating Voltage	6–7.4 V
Connectivity
Connector	JR (Universal)

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Above Average Stronger than 85% of 1060 Digital Standard servos at 6.0V
Speed	Average Faster than 43% of 1045 Digital Standard servos at 6.0V
Weight	Average Lighter than 39% of 1880 Digital Standard servos

Performance Analysis

Shaft Power	4.97–6.91 W
Power Density	3.715 W/in³ More power-dense than 69% of 1768 Digital Standard servos
Torque Density	5.9265 oz-in/g Stronger than 87% of 1053 Digital Standard servos
Torque-to-Volume Ratio	216.61 oz-in/in³ Denser torque than 87% of 1058 Digital Standard servos
Speed-to-Weight	0.09804 (1/sec·g) Faster than 34% of 1038 Digital Standard servos
Speed-Torque Trade-off	60.45 Better balanced than 85% of 1034 Digital Standard servos
Torque Gain per Volt	14.71%/V More voltage-responsive (torque) than 43% of 873 Digital Standard servos
Speed Gain per Volt	10.98%/V More voltage-responsive (speed) than 23% of 874 Digital Standard servos
Voltage Range Width	1.4 V Wider voltage range than 33% of 1560 Digital Standard servos