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Hitec HS-77BB
Low Profile

Hitec HS-77BB

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-22
Identity
Brand Hitec
Product Number 31077S
Category Hobby
Performance
Torque
6.0V 76.00 oz-in
4.8V 61.00 oz-in Bottom 10%
Speed
6.0V 0.14 sec/60°
4.8V 0.18 sec/60° Bottom 10%
Running Current
6.0V 0.300 A
4.8V 0.250 A Average
Stall Current ≤0.8 ATop 10%
Physical
Weight 1.23 ozAverage
Dimensions L 1.73 in
W 0.90 in
H 0.98 in
Case Material Plastic
Drivetrain
Motor Type 3-pole
Gears Nylon
Gear Spline/Teeth 24 T estimate
Rotation Mode Positional
Rotation/Support Dual Bearings
Control & Signal
Modulation Analog
Rotational Range 135°
Pulse Cycle 20 ms
Pulse Width 900-2100 µs
Neutral Position 1500 µs
Dead Band 8 µs
Angle Sensor Potentiometer
Control System PWM
Programmable No
Electrical & Environment
Operating Voltage 4.8–6 V
Temperature -20–60 °C
Water Rating IP54
Idle Current 0.008 A
Connectivity
Connector S
Wire Length 300 mm

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

TorqueBottom 10%
Stronger than 5% of 216 Low Profile servos at 4.8V
SpeedBottom 10%
Faster than 8% of 214 Low Profile servos at 4.8V
WeightAverage
Lighter than 41% of 52 Analog Low Profile servos
Running CurrentAverage
Lower draw than 45% of 30 Low Profile servos at 4.8V
Stall CurrentTop 10%
Lower draw than 100% of 88 Low Profile servos

Performance Analysis

Shaft Power 0.63–1.00 W
Power Density0.658 W/in³
More power-dense than 57% of 52 Analog Low Profile servos
Torque Density1.7479 oz-in/g
Stronger than 39% of 133 Hitec servos
Torque-to-Volume Ratio39.98 oz-in/in³
Denser torque than 29% of 133 Hitec servos
Speed-to-Weight0.15919 (1/sec·g)
Faster than 67% of 131 Hitec servos
Speed-Torque Trade-off10.98
Better balanced than 36% of 131 Hitec servos
Current-per-Torque Ratio0.0131 A/oz-in
More efficient than 88% of 81 Hitec servos
Idle-to-Running Current Ratio0.032
Lower idle draw than 60% of 61 Hitec servos
No-Load vs Stall Current Spread3.20
5th-highest no-load vs stall current spread of 56 Hitec servos
Torque Gain per Volt20.49%/V
More voltage-responsive (torque) than 69% of 125 Hitec servos
Speed Gain per Volt23.83%/V
More voltage-responsive (speed) than 80% of 123 Hitec servos
Voltage Range Width1.2 V
Wider voltage range than 67% of 25 Analog Low Profile servos
Dead-Band-to-Pulse-Width Ratio0.0067
Finer dead band than 6% of 125 Hitec servos

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