12-36V 3A Pulse Width PWM DC Speed Regulator CW Wired Knob | Railwayscenics

12-36V 3A Pulse Width PWM DC Speed Regulator CW Wired Knob



    Price in GBP and includes VAT at 20%.
  • Model Number:217-150
  • Delivery Weight:0.030 kgs
  • Share This Product
In Stock and Available To Order: 1 items

3A adjustable Pulse Width Modulation PWM 12-36V DC motor speed control regulator with panel mountable knob and control.

Can be used with 12 volt to 36 volt DC voltage input and can easily provide a continuous current of 3A to a DC motor or other DC load. Note: The voltage applied to the motor will be the same as the supply voltage applied to the circuit.

Convenient and easily use as rotation switch can be panel mounted and board can be surface mounted.

PWM allows for high torque control of motors.

With reverse polarity protection and high current protection.

Has screw terminals for inputs and outputs.

The board only operates the motor in one direction. If you wish to reverse the motor you will need to wire a reversing switch into the circuit.


Input Voltage: DC 12V - 36V max
Sustained current: Maximum 3A
PWM Duty Cycle:5% -100%
PWM Frequency:500khz


Length: 51.5mm
Width: 29mm
Height: 18mm
Fixing hole Diameter: 7.0mm
Cable length: 200mm

Operating Instructions

1. Connect your DC motor or DC load to the motor terminal connections as indicated on the rear of the circuit board.
2. Connect the DC supply voltage to the input connections making sure of the correct polarity. It is recommended that an appropriately rated fuse is installed in the positive supply to the board in order to protect the circuit from any possible damage.
3. You can now control the speed of the motor through potentiometer.

Contents of Package

1x PWM Motor speed controller regulator

Delivery Options

Please be aware that there may be import duties/taxes on orders you receive if you are ordering from outside of the UK. Unfortunately we cannot advise how much these charges will be.

Where possible all orders placed by 09-00am on a working day, will be packed and posted that same day. If this is not possible then items will be posted the following working day. In any event all orders will be posted within 5 working days. Working days are Monday, Tuesday, Wednesday, Thursday and Friday. We do not post items out on weekends.

All of our shipping costs are calculated dynamically based on your basket content weight. Therefore as you add or remove products from your basket, the delivery charge and the delivery methods available will automatically update. We believe that this is the fairest way to calculate postage and packaging costs. Postage and packaging costs start from as little as £ 2.35, and then increase dependent on the weight as set by Royal Mail.

We offer a wide range of delivery options from Royal Mail, and a Courier. Signatures will be required on some delivery options but this is mentioned in the checkout system.

Once your items have been posted we will send a confirmation email to your registered email address. If there is any, tracking information will also be included.

Full UK shipping terms can be found on our UK shipping page and International shipping terms can be found at our International shipping page.


Railwayscenics operates a 14 days return policy. Please contact us before returning any items either by email or phone.

To be accepted for return on this basis, items should be returned within 14 days of receipt. Provided the goods are returned to us in the same condition as they were received, we will arrange the refund within 14 working days.

Any Goods returned after 14 days as unwanted or incorrectly ordered or unauthorised may be accepted at the discretion of Railwayscenics but will be subject to a minimum restocking fee of 20% of the invoice value of the items or £10, whichever is the greater.

For damaged or faulty goods, please contact us within 48 hours of receipt and we will advise on the course of action to be taken.

Please note that exclusions apply and full details can be found on our Returns page.


Railwayscenics are committed to safeguarding the privacy of our website visitors. During the registration and checkout process we ask for the minimum of information from you which helps us offer the best service and delivery of our products to you.

The same information helps us personalise, and continually improve, your shopping experience at Railwayscenics.

The information that we are given when you place an order is usually kept for 6 years from the end of the financial year that you placed the order. This is to comply with UK government tax rules and regulations.

Any information you give us when making an enquiry about our products or services is only kept as long as we need it. Ideally once we have answered your query, we destroy or delete any information you give us.

We respect your privacy and appreciate your business. At no time do we ever provide your account contact or payment information to any third-party vendor, associate or service provider unless absolutely necessary in order to complete your transaction and order.

Full details of our privacy policy can be found on our Privacy Policy page.


At Railwayscenics we do everything we can to make sure that the information included on our product pages is always as accurate as possible. However, because products are regularly improved or purchased from different suppliers, the product information may occasionally change without notice.

Any images used are representative of the product only and may not accurately depict the actual product. Any technical specifications are for guidance only and cannot be guaranteed accurate.

This does not affect your statutory rights. Any information on this website is supplied for personal use only and must not be reproduced in any form whatsoever without the prior consent of Railwayscenics, nor without due acknowledgement.

So why should you buy from Railwayscenics?

Railwayscenics is a family run business, and since 2008 has built an enviable reputation for providing a first class service, and a range of affordable high quality products used by many hobbyists and modellers.

We pride ourselves on our reputation for high quality customer service and we are always happy to provide support to our customers who need assistance with choosing products or require after sales help.

We like to keep you informed during, and after, the sales process by regularly sending order update emails. We also send out a weekly e-newsletter detailing any offers we have on, plus lots of product and other news.

At Railwayscenics we are doing everything that we can to help protect the environment and the damage that we do to it. Where possible we reuse boxes and packaging materials that we receive from suppliers. We have switched to packaging that is either fully made from, or partially made from, recycled materials, which is helping to reduce our impact, and carbon footprint, on the environment. More information on what we are doing can be found on our Recycling page.

If you have any problems with your order, or simply want to enquire about a product before purchasing, simply give us a call or drop us an email and we will be happy to help.

This is a handy little alternative to buying a more expensive controller - it can be fed from existing DC circuits (of the right voltage of course), and seems to give quite fine control of a good virtually unused engine (GWR KG5). A reversing switch is required for connection to track if used as an engine controller: I recommend from this website a 4-pole 3-way break-before-make rotary switch with poles connected together so 3 amps can be handled easily - and a positive rail-feed current trip of 2.5A, 3A max, [to match the device]. With a bit of clever electronics you could use it to control your station lights! Drive the pot with a servo? All-in-all a good purchase which I recommend.

Rated by Bill Mitchell