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MK H5940S 40A MCB type B 6kA Single Pole Miniature Circuit Breaker for MK Sentry Consumer Units

Model No. 5940S by: MK Electric
Availability: Normally In Stock


List price £15.63
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This is the MK Sentry H5940S 40A MCB type B 6kA, a 40 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 H5940S is a 40A, 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 H5940S 40A 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: 40A
  • 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 H5940S provides an overcurrent rating of 40A 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.

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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.