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Product Details

Single pole 230V B curve MCBs.

Technical Specification
Brand MK
Manufacture ID 5945s
Type Type B
Amp Rating 45
Delivery details

Covid-19 Update

  • Free Next Business Day delivery for orders over £25 to home and site is available for orders placed before 5pm
  • Saturday and Sunday delivery is now available for orders placed before 4pm on Friday for Saturday delivery and 4pm Saturday for Sunday delivery, see here for details
  • We have temporarily suspended our Pre-12 delivery service
  • Once your order has been dispatched you will receive an invoice email with the courier details and your tracking number
  • Alternatively go to MyAccount, click on your Order History, click on the TRACK icon to link through to the carrier website and the tracking details for your delivery
  • If your order contains more than one item it may be split into two deliveries as we manage volume across our network
  • Due to carrier constraints it is not currently possible to deliver age restricted items. Please use our Click & Collect service for these products
  • Delivery direct from suppliers is now available and specific delivery times will be displayed on the product page
Order Value: Under £25 Over £25 but less than £75 £75 & Over
Next Business Day Delivery (Mon-Fri) usually before 6pm £5 Free Free
Pre-12 Delivery before 12 noon Next Business Day £10 £5 £5
Remote areas standard delivery (2-4 days) £5 Free Free
Saturday Delivery order by 4pm Friday £10 £5 Free
Sunday Delivery order by 4pm Saturday £10 £5 Free


Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details

Covid 19 Update

Click & Collect

  • Safe contactless collection is available 7 days a week at our branches
  • Our branches are open 7am-5pm Mon-Sat and 9am-4pm Sun
  • Keeping our colleagues and customers safe and well and respecting stringent social distancing requirements is our number one priority – 2 metre rule enforced
  • Our available product range will not require more than 1 person to lift
  • Please see our guide to click and collect below

  • Please ensure that your mobile number is added so that we can text you when your order is ready to collect

Call & Collect

Due to current trading conditions we have suspended our Call & Collect service until further notice.

If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 7pm Mon-Fri (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Reviews
MK MCB 45A SP Type B is rated 4.6 out of 5 by 25.
Rated 5 out of 5 by from Easy fit. Not fitted one before and it was easy to swap over for a lower rated mcb.
Date published: 2020-05-04
Rated 5 out of 5 by from Good product - well packaged and good value. Good product - well packaged and good value
Date published: 2020-05-02
Rated 1 out of 5 by from Faulty as delivered I bought this MCB a few months ago as one of the more expensive MCBs of its type. Just come to use it and find it only locks on with the switch held horizontally. Put it in the normal vertical position and it won't lock on! Not going to choose MK as a better quality item again...
Date published: 2020-04-22
Rated 5 out of 5 by from Excellent Very happy with price and product
Date published: 2020-04-12
Rated 5 out of 5 by from MK MCB 40A SP Type B GREAT price for a MK fuse good make reliable company
Date published: 2020-03-20
Rated 5 out of 5 by from 32amp mcb Brought this as needed a mcb sorted problem good price and in stock
Date published: 2020-03-17
Rated 5 out of 5 by from Mk mcb 6a type b Mk good reliable make and a great price from toolstation
Date published: 2020-03-10
Rated 5 out of 5 by from Mk 40 sp type b rcb Great price and made by MK must be good
Date published: 2020-03-10
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