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S401 Mini Servo

S401 Mini Servo

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S3070 Digital Sub-Micro Surface Servo: Water Resistant
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Key Features

  • The S3070 is the ultimate upgrade for the steering servo in your Losi 1/16th scale SCT, Mini LST, Mini Sprint, or Mini Late Model
  • Water resistant design protects electronics from moisture
  • Precise digital control with a durable all metal gear train
  • 28 oz.-in. @ 6V of torque make the S3070 a powerful option for mini vehicle applications
  • Quick response of 0.11 sec/60 degrees @ 6V is noticeably quicker than stock servos
  • Ball bearing design reduces resistance in gear train allowing for maximum performance


The S3070 is a durable, high performance, high accuracy digital servo perfect for use in most mini 1/12-1/18 size vehicles. With metal gears, high torque, and high speed, it will be a nice performance boost to the stock servo in the mini vehicles.

Bearing: Single
Connector Wire Length: 10 in (254mm)
Gear Material: Brass
Gear Type: Metal
Motor Type: Coreless
Servo Operating Voltage: 4.8 - 6.0V
Servo Size Category: Mini and Micro
Servo Type: Digital
Speed: 0.13 sec/60 deg @ 4.8V; 0.11 sec/60 deg @6.0V
Spline Count: 21 Teeth
Torque: 22 oz-in (1.58kg-cm) @ 4.8V; 27 oz-in (1.94kg-cm) @6.0V
Wire Gauge: 24 AWG

Parts Listing

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Optional Accessories

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What's the difference between digital and analog servos?

Digital and analog servos have very similar construction and components. They both use the same type of motors, gears, cases, and have a potentiometer. A digital servo is different in the way it processes the incoming signal and converts that signal into servo movement. 

An analog servo when it receives a command to move, takes that signal and sends pulses to the servo motor at about 50 cycles per second, which in turn moves the motor to its required position determined by the potentiometer.

A digital servo has a micro-processor that receives the signal and then adjusts the pulse length and amount of power to the servo motor to achieve optimum servo performance and precision. A digital servo sends these pulses to the motor at a much higher frequency which is around 300 cycles per second. This helps eliminate deadband, provides a faster response to the servo motor, smoother motor movement, and has higher resolution and holding power than an analog servo.

There are some disadvantages to digital servos, but the disadvantages are not in any way close to out weighing the advantages. A digital servo will have a higher power consumption (Around 10 to 15 mAh per servo at idle) than an analog servo due to its higher pulse frequency, so larger capacity battery packs are recommended. Digital servos also are more expensive than analog servos which can get very costly in applications that require many servos.

What grease should I use on my servo gear train?

For JR servos we recommend Tamiya ceramic grease (TAM87025).

Why doesn't my servo center properly?

There are several scenarios which may attribute to this problem.

1. The servo arm fit on the output spline may be loose.

2. There may be slop or wear in the gear train.

3. There may be slop or binding in the linkages.

4. You may have a faulty servo saver.

5 The push rods may be too flexible.

6. Improperly mounted servo (screws too tight, mounting rail too tight against the servo)

7.Faulty extention, damaged lead or dirty connector.

8. Worn or dirty pot.

Product Support Tips

Product Support

Technical questions about this Spektrum product should be directed to Horizon Hobby's Product Support Department:

Horizon Hobby, LLC.
ATTN: Product Support

2904 Research Road
Champaign, IL 61822

To place a Horizon Hobby Support Inquiry please visit our Inquiry Form Support Phone:(877) 504-0233
Fax:(217) 355-1552

Sales Support

If you would like to purchase this product, please go to the Store Locator or contact the Horizon Hobby Consumer Sales Department:

Horizon Hobby, LLC.
ATTN: Consumer Sales

2904 Research Road
Champaign, IL 61822
Email: Sales Phone:(800) 338-4639
Fax:(217) 355-1552