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KST A20-3813
Standard

KST A20-3813

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-10-10
Identity
Brand KST
Category Hobby
Performance
Torque
8.4V 596.84 oz-in
7.4V 527.44 oz-in
6.0V 416.40 oz-in Above Average
Speed
8.4V 0.12 sec/60°
7.4V 0.13 sec/60°
6.0V 0.18 sec/60° Below Average
Physical
Weight 2.54 ozBelow Average
Dimensions L 1.595 in
W 0.787 in
H 1.496 in
Case Material Aluminum
Drivetrain
Motor Type Brushless
Gears Steel
Rotation Mode Positional
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Rotational Range 100°
Pulse Cycle 3 ms
Pulse Width 900-2100 µs
Neutral Position 1500 µs
Refresh Rate 333 Hz
Control System PWM
Signal Voltage 3-5V
Electrical & Environment
Operating Voltage 6–8.4 V
Temperature -10–55 °C
Connectivity
Connector JR (Universal) estimate

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.

Class Comparison

TorqueAbove Average
Stronger than 85% of 1043 Digital Standard servos at 6.0V
SpeedBelow Average
Faster than 20% of 1041 Digital Standard servos at 6.0V
WeightBelow Average
Lighter than 28% of 1902 Digital Standard servos

Performance Analysis

Shaft Power 4.28–9.20 W
Power Density4.896 W/in³
More power-dense than 78% of 1759 Digital Standard servos
Torque Density5.7833 oz-in/g
Stronger than 85% of 1036 Digital Standard servos
Torque-to-Volume Ratio221.68 oz-in/in³
Denser torque than 87% of 1042 Digital Standard servos
Speed-to-Weight0.07716 (1/sec·g)
Faster than 11% of 1033 Digital Standard servos
Speed-Torque Trade-off74.96
Better balanced than 90% of 1031 Digital Standard servos
Torque Gain per Volt18.06%/V
More voltage-responsive (torque) than 71% of 850 Digital Standard servos
Speed Gain per Volt20.84%/V
More voltage-responsive (speed) than 85% of 871 Digital Standard servos
Voltage Range Width2.4 V
Wider voltage range than 59% of 1539 Digital Standard servos

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