Categories Categories

High Current, DC Motor Speed Control 25 or 50 Amps 25/50a diagram hall effect devices
High Current, DC Motor Speed Control 25 or 50 Amps

12V-48V DC Speed Controller 25A (PCB Model)

$60.95 (Inc GST)
($60.95 inc tax)
Weight: 0.210 kg
In stock
Our quantity discounts:
Quantity 5+ 10+ 25+
Price $52.64 $49.87 $44.33

25A DC Motor Control - PCB Model IV

For Hall Effect Throttle Information, Please visit the throttle page to see all the models we have available

Well, here we are already at V! We've made some changes to the design of the unit and we've increased the relaibility even further. This will be pretty much the final revision of this board as it's now at a point where its as tough as nails!

It's a high quality unit that you can use for multiple applications over many years, not a cheap unit that you get to use only once because it blew up. The series III (now series IV) was built to expand on the ranges of motors that customers typically tend to use, and we didn't just go a little overboard, we went WAY overboard.

High Power Design!
Simply, one of the best value units available on the market in its price range! Has features found only on controllers 2-3 times more expensive!
Lovingly Hand Crafted in Australia!



  • 12V-48V Input Voltage (Battery Bank) 12V-55V (Regulated Power Supply)
  • Simple to setup and use!
  • 0-100% Speed Regulation!
  • Constant torque with Pulse Width Modulation (PWM)
  • High Quality Industrial Design
  • Efficient High Voltage Regulator
  • On/Off Switch (Built in!)
  • 3 Soft start settings (Off, Slow, Slower) ramps up to the desired speed once the controller is switched on, and unlike cheap controllers every time you switch it off and on (using the switch) it will ramp up to speed again!
  • Max Current up to 40A for up to 60 seconds or Short duration Bursts up to 75A for less than 5 seconds)
  • 25A Contuinous Duty
  • 2 Oz Double Sided PCB
  • High Speed Mosfet driver averaging 1.6uS opening/closing times
  • High Current 180A Mosfets with worlds lowest RDS On in TO-220!
  • Low Battery Voltage cut-out (for 12V, 24V and 36V)
  • Adjustable Frequency From 300Hz to 25Khz
  • Can work with Hall Effect Throttles (Model Dependent)
  • Over voltage Protected, ESD Protected!
  • Filtering, Clamping & Snubber Protection Included
  • Adjustable Start Positioning for Hall effect and Potentiometer setups
  • 8 Way Terminal Block For simple connections
  • External connectors for Hall Effect or Potentiometer, so you can make your own cable lengths up to 5m!
  • Passive cooling! No fans to break down or sieze up!!
  • Highly Configurable!
  • Potentiometer, Hall effect throttle or Hall Effect Foot throttle options!
  • Suitable for use with power supplies (Doesn't feed excess power back into the source)
We shouldn't even have to say this but Please be AWARE of the current your motor draws. We've seen (and even sell) some motors that can be overdriven. To give an example, a motor may be rated at 450W at 24V which should use about 24A, but when you power it up and have it under HEAVY loading, the current draw can go as high as 150A!
ALso, please be aware of the voltages your motor can generate!
Putting a high power motor on this controller and then trying to overdrive it is a BAD idea!, the supression diode in this controller can handle up to 1200v from the motor but if you have the above setup then the motor being an inductor can generate incredibly high voltages which then feed BACK into the controller!
So you may need to add a snubber to your motor in these cases to drop the high voltages! 


Setting up and Using your new controller!

Simply download the instructions on the 'Attachments' page !

Speed control Manual (25A-50A_Speed_Control_DOX101.pdf, 184 Kb) [Download]