Registered Customers
Login for faster checkout

Email: Forgot Password?Password:

online store
Guest Checkout Simple checkout system

No need for an account, continue to checkout.

online store

DMA Cut-Out Battery Isolation Switch

DMA Cut-Out Battery Isolation Switch exclusively from McGill Motorsports. DMA Electrical Products are manufactured to a high standard and are supplied with a 12 month manufacturer's warranty, making them extremely good value for money.
Product Code: LUCAS_ISO
FREE UK 1st Class Delivery
International and Next-Day shipping details
DMA Cut-Out Battery Isolation Switch
DMA Cut-Out Battery Isolation Switch

DMA Engineering

Battery Isolation Switch with Fixed Handle

DMA Competition Products are manufactured under tight quality control. All products are supplied with a 1 year manufacturer's warranty as standard.


  • Original Styling
  • T-Bar style switch
  • Metal body with ceramic case
  • Twin terminal design
  • 19mm Hole Required
  • 10mm Terminals
  • 100A Continuous at 12V 


  • Battery kill switch - instantly shut off your battery for safety
  • Easy to connect to your vehicle
  • Ideal for motorsport, marine, industrial or road going vehicle use
  • As found in many vintage race cars
  • Twist 90º to isolate battery


  • High quality item, reliable
  • DMA Engineering, trusted brand
  • 1 Year Manufacturer's warranty



DMA Isolation Switch - Ideal for Motorsport and Road Going Applications.

DMA Electric products are high quality, reliable and excellent value.

To complement these switches, we have a range of other products available in our online store.

Widest point: 43.5mm
Length: 83mm


We remain open to despatch orders daily. Phone lines are also still open and operating as normal.

All UK orders are despatched via Royal Mail 24 or Express Courier Service – please be aware these services are experiencing some delays on occasion.

All international orders are being sent on the day of order with some countries/services experiencing slight delays.

Our showroom is currently closed however we can arrange collection from our premises, please call to arrange.

UK Customers - Shipping

Free 1st class UK delivery with all orders. Depending on item weights and value, orders may be despatched on a recorded signed for service or in some cases upgraded free of charge to a next working day courier service. If you order does not meet the criteria for a free upgrade, you have the option to upgrade to this service for a small charge. Saturday guaranteed services will also be available for orders within the UK at an additional surcharge.


International Customers - Shipping

If you are buying from outside the UK, please continue to the checkout. The site checkout will automatically take your order and calculate the lowest delivery charge depending on the overall weight. You will have express and economy shipping options. If you are ordering from outwith the EU, you will be entitled to the removal of UK VAT, this will be done automatically. If you are a VAT registered company in the EU, you will be entitled for the removal of VAT upon the provision of your Europa VAT number, please contact us direct as the website is not capable of processing this.


Please note: We aim to have all orders with standard delivery placed before 4pm sent on the same day - orders going by courier will need to be placed by 2pm in order to ensure being sent same day, due to our courier collection times.


Payment Methods

You can use your credit/debit card via our secure online server provided by RBS WorldPay. You also have the option of using PayPal to make payment. Alternatively, if you prefer to pay over the telephone, we can accept credit/debit card by this means. Please call us on +44(0)1592 654136 (Mon-Thurs 8am - 5pm, Fri 8am - 5pm, Sat 8am - 12noon). We will also accept payments by bank transfer, cheque or postal order by special arrangement, please contact us for more details.

The above number can also be used for any technical support you may require.

Shopping basket
Your basket is empty...
Rod Ends