The future of speed control is here

Mtroniks Viper Sub8

  • £49.99
  • Easy one touch set up
  • Forwards and reverse
  • 4.8 to 9.6V  Operation
  • 40A Brushed motor limit

RC submarine speed controller. Full description

Product out of stock
  • Description
  • Delivery and Returns

The Viper Sub8 is a Brushed speed controller designed specifically for use in RC submarines.

The Sub8 has a 40Amp motor limit, what this means is that you can use any, DC Brushed motor, as long as the current drawn by that motor does not exceed 40Amps under load (with the prop connected, under water).

The Sub8 is the perfect speed controller for anybody who is into RC submarines and wants a speed controller designed specifically for their hobby interests.

The Sub8 has all the same features as the Viper Marine range of Brushed speed controls with the added bonus of having a high power 3A BEC. The BEC fitted to the Sub speed controls is more powerful than that used on the standard Viper Marine range. This allows you to hang more auxilliary functions on the regulated 5.0V for any of your models other features that might require a 5.0V supply! Features such as adjustable reverse functions and a built in failsafe are standard on Sub8 and the motor stall protection is a feature which cannot be overlooked when a possible encouter with weeds is always a possibility. Not to forget that the Viper Marine range of speed controllers are all completely 100% waterproof.

For matching motor wires see 

Technical Specification

Product Type Speed Controller Only
Direction Forwards/Reverse
Motor Type Brushed
Motor Limit 40A
Battery Type NiCAD/NiMH/Lead Acid
Lipo safe No
Operating Voltage Maximum 9.6 Volts
Set up Digital 1-touch
BEC 3.0A
Motor Short circuit protection Yes
Thermal overload protection Yes
Failsafe Built in
Dimensions L39.0mm x W34.0mm x H13.0mm
Weight 55.0g
Delivery & Returns


If the item is in stock we aim to despatch all orders within two working days (Monday to Friday). If any item is not in stock, please allow up to 14 days for delivery. For special order items, please allow 21 days delivery.

All goods sent within the UK are sent by Royal Mail or UPS and we aim for delivery within 3 working days. Overseas delivery may take a little longer and may be subject to delay in customs. Deliveries may be subject to import duties and taxes and the burden lies with the purchases to satisfy charges subsequently incurred.

Returns & Exchange Policy

At Mtroniks we want you to be totally happy with everything you purchase from us. If you have a problem it is very helpful to us if you Indicate what the problem is and whether you require us to take a look at it for you. We cannot refund to you if you do not have your purchase details!

If any of your items are faulty please let us know immediately on 01943 461482 or by emailing to and return them straight to us at the address below and we will exchange it for you as quickly as possible.

Please send your returns to:
Mtroniks Ltd.
41A Ilkley Road
West Yorkshire
LS21 3LP


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