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JR E3977
Micro

JR E3977

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-07-28
Identity
Brand JR
Product Number (add)
Category Hobby
Performance
Torque
6.0V 30.60 oz-in
5.0V 36.70 oz-in
Speed
6.0V 0.09 sec/60°
5.0V 0.11 sec/60°
Running Current (add)
Stall Current (add)
Physical
Weight 0.72 oz
Dimensions L 0.91 in
W 0.47 in
H 0.87 in
Case Material (add)
Drivetrain
Motor Type (add)
Motor Drive (add)
Gears Hybrid
Gear Spline/Teeth (add)
Shaft Size (add)
Rotation Mode (add)
Rotation/Support (add)
Backlash (add)
Control & Signal
Modulation Digital
Direction (add)
Rotational Range (add)
Mechanical Limit (add)
Pulse Cycle (add)
Pulse Width (add)
Neutral Position (add)
Dead Band (add)
Refresh Rate (add)
Angle Sensor (add)
Control System PWM
Programmable (add)
Signal Voltage (add)
Electrical & Environment
Operating Voltage 6–7 V
Power Source (add)
Regulator Type (add)
Temperature (add)
Water Rating (add)
Certification (add)
Idle Current (add)
Connectivity
Connector JR (Universal) estimate
Wire Length (add)
Origin
Country of Origin (add)

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.

Performance Analysis

Shaft Power 0.62–0.63 W
Torque Density1.4927 oz-in/g
Stronger than 11% of the 239 Digital Micro servos in the database
Torque-to-Volume Ratio82.60 oz-in/in³
Denser torque than 62% of the 241 Digital Micro servos in the database
Power Density1.697 W/in³
More power-dense than 46% of the 545 Digital Micro servos in the database
Speed-to-Weight0.54201 (1/sec·g)
Faster than 21% of the 239 Digital Micro servos in the database
Speed-Torque Trade-off2.75
Better balanced than 42% of the 241 Digital Micro servos in the database
Voltage Range Width1.0 V
Wider voltage range than 3% of the 407 Digital Micro servos in the database

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