Want to view product prices with or without VAT?

Last shipping date: 18 Dec 2023. We are closed: 21 Dec 2023 - 1 Jan 2024. Reopening: 2 Jan 2024
Sale Icon
Review Icon
Free Delivery Icon

MK H5945S 45A MCB type B 6kA Single Pole Miniature Circuit Breaker for MK Sentry Consumer Units

Model No. 5945 by: MK Electric
Availability: Usually 3-5 days


List price £7.64
You save £3.44!
Free Delivery
(over £100+VAT, applies to zones A&B only , £6 +VAT otherwise)
Click & Collect
Order online & collect in store
Ask A Question

This is the MK Sentry H5945S 45A MCB type B 6kA, a 45 amp rated Single Pole Miniature Circuit Breaker. It is part of the new range of MCBs from MK Electrical. This MCB will operate and interrupt the supply to prevent damage to the installation.

The MK H5945S is a 45A, Single Pole, Type B MCB and it is suitable for installation only in the MK CIRCPRO Sentry consumer units and two or four module enclosures.

MK H5945S 45A MCB type B 6kA Single Pole - Specs

  • Short Circuit Breaking Capacity: 6kA
  • Trip free mechanism
  • Positive contact status indication in accordance with 16th Edition IEE wiring regulations
  • Dimensions: height 83mm x width 18mm x depth 73mm
  • Cable Capacity: 35mm²
  • Current Rating: 45A
  • Trip type: type B
  • Tripping Characteristics: B Curve
  • Mounting: DIN Rail
  • Single pole breaker
  • Number of poles: single pole
  • Voltage: 230V | 400V
  • Type: miniature circuit breaker, it detects overcurrents due to both overload and fault currents
  • All Sentry MCBs have a short circuit breaking capacity of 6000A (M6).
  • Ideal for: new MK CIRCPRO Sentry consumer units and two / four module enclosures
  • MK H5945S provides an overcurrent rating of 45A and a short circuit breaking capacity of 6kA

Note: Some images and pictures are for reference only. The item may differ from the image/picture due to manufacturer's change. Should you require the exact item in the picture, please call or email us to enquire.

Ask a question

Note: HTML is not translated!


Sparks Direct delivers via courier to the UK only; the standard delivery charge is £6 + VAT for all orders under £100 + VAT. If your order is over £120, you get free delivery (unless there's a special delivery charge for the items you wish to order or you're in shipping zone C or D). Full details for shipping charges can be found via Terms and Conditions.

If the items you order are in stock and the order is placed before 1.00pm, delivery can be made within 1-2 working days. If the items are not in stock, we will inform you via email how long it will take or ask for your confirmation if there's a long lead time.


We offer 30-day returns for unwanted items - please email us to request a returns number which will need to be quoted when the items are returned. For faulty items or items damaged in transit, please advise via email, and an appropriate returns number will be provided. Full details concerning returns and refunds can be found via our Terms and Conditions.