Hitec HS-5645Mg Digital High Torque MG Servo HRC35645S
HRC35645S Hitec HS-645Mg Servo Torque Metal Gear S/Jr/Z

Hitec HS-5645Mg Digital High Torque MG Servo HRC35645S

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reg $69.97

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Hitec digital version of our popular HS-645 is the HS-5645MG, featuring a programmable digital circuit and our custom MP/metal gear train technology. Perfect for larger airplanes and heli’s, the HS-5645MG will deliver higher resolution and torque than its analog brother.

Metal Horn (R-ML) Included


  • EPA, Speed, Direction, and Fail-Safe Programmable
  • MOSFET amplifier.
  • Gold plated contacts.
  • Three metal gears
  • Dual ball bearings.
  • Indirect drive long life potentiometer.
  • High standing torque.
  • Watertight and dustproof.
  • Includes blue aluminum, heat-treated servo arm
  • Works with fixed wing aircraft and helicopters up to 40 pounds, 1/10th and 1/8th on- or off-road vehicles.

This package includes:

  • One digital high torque servo with 12" wire and S/JR/Air-Z connector
  • One white small X-shaped servo horn.
  • One red Large X-shaped servo horn.
  • One white adjustable servo horn.
  • One white offset straight servo horn.
  • One white disc servo horn.
  • One blue anodized, heat treated servo arm horn.
  • Four 2 x 14mm mounting screws
  • Four brass eyelets
  • Four black rubber vibration isolators.
Hitec, JR, and Airtronics-Z radio system

Programming the Fail-Safe:
In order to program the Fail-Safe on this servo. Modeler will need to purchase the Hitec Field Programmer.
The metal servo horn will fit any Hitec servos that have a "+" stamped on top of the output shaft.

Speed: 0.23 sec/60? at 4.8V
Speed: 0.18 sec/60? at 6.0V
Torque: 143.03 oz-in at 4.8V
Torque: 164.2 oz-in at 6V
Length: 1.59" (40.6mm)
Width: 0.77" (19.8mm)
Height: 1.48" (37.8mm)
Weight: 2.11oz (60g)

Review Summary


4 Stars Nice servo

David from MA wrote (October 29, 2013):

Works as advertised and reliable so far.

4 Stars the price is right

from States wrote (March 24, 2009):

good servo for the price this one seems to work better than the older version of the 645 mg and is more compatible with the spectrum radio.