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FEETECH Standard Servo FS5103B

Product Code: 3424POL
Excl. VAT: £7.80 Incl. VAT: £9.36

The FS5103B is a general-purpose, low-cost standard analog servo from FEETECH. Two ball bearings help reduce friction and improve performance. Servo horns and associated hardware are included.


This servo can work with both 5 V and 3.3 V servo signals.

Key specs at 6 V: 0.16 sec/60°, 53 oz-in (3.8 kg-cm), 40 g



The FS5103B is a general-purpose standard-size analog servo from FEETECH. The output shaft is supported by two ball bearings for reduced friction. The FS5103B works with standard RC servo pulses, providing a running angle of approximately 180° over a servo pulse range of 600 µs to 2400 µs, and it has a 12″ (30 cm) cable that is terminated with a standard JR-style connector, which is Futaba-compatible. 

For more advanced robotics applications, please note that we also carry a version of this servo that is specially modified to provide access to the feedback potentiometer through a fourth (green) wire, which lets you monitor the actual position of the servo from your controller:

Size:   40.8 × 20.1 × 38 mm
Weight:    40 g

General specifications

Digital?:   N
Speed @ 6V:   0.16 sec/60°
Stall torque @ 6V:   3.8 kg·cm
Speed @ 4.8V:   0.18 sec/60°
Stall torque @ 4.8V:   3 kg·cm
Lead length:   12 in
Hardware included?:   Y

Datasheet for the FEETECH Standard Servo FS5103B (133k pdf)  Note: while this datasheet lists the 6 V stall torque as 3.2 kg*cm, Feetech has since revised this to 3.8 kg*cm based on more recent measurements (this is also more in line with their listed 4.8 V stall torque of 3.0 kg*cm).

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

Returns Policy

FEETECH Standard Servo FS5103B.
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