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BRK 660MBX Mains Powered Optical Smoke Alarms

Discontinued Product - No compatible replacement

Please Note: The manufacturer has withdrawn from the European market and there is compatible alternative that will fit onto your existing. Since it is not possible to interlink alarms from different manufacturers, new alarms will be needed throughout. The recommended replacement for the whole discontinued BRK 600MBX range is the Kidde Firex series. This will require an electrician to replace your old bases for new.

alternative product

Kidde Firex Mains Powered Alarms with Alkaline Battery

  • 230V mains powered with alkaline back-up battery
  • Available in Optical and Heat versions
  • Interlink with up to 24 units
  • Suitable for BS 5839-6: 2019 Grade D2 installations
  • Kitemarked and CE marked
  • Please note: alarms are sold individually
  • Also suitable for both the Welsh and Scottish 2022 legislation

£23.99 inc VAT

£19.99 ex VAT

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Product Overview

This BRK 660MBX is a direct replacement for your outgoing BRK 660MBX optical smoke alarm which use replaceable alkaline batteries. Optical smoke detectors such as the 660MBX are largely replacing the older ionisation smoke detection technology and are better at detecting slow, smouldering fires. The 600 series alarms all use the same base so your new alarm is guaranteed to fit and be compatible with your existing system.

The supplied BRK 660MBX is a thermally enhanced optical smoke alarm ideal for most rooms in the house such as hallways, living rooms, bedrooms, and landings, including rooms that are usually covered by traditional ionisation alarms. This alarm features a central test and hush button making maintenance very easy while a replaceable 9V alkaline backup battery ensures that it continues to operate even during a power failure, so you are never without protection.

  • Genuine BRK 660MBX replacement optical smoke alarm head
  • 9V alkaline backup battery (included)
  • CE and Kitemarked to BS EN 14604: 2005
  • Fits onto your existing BRK twist-fit alarm base (spare included)
  • Suitable for installations complying to BS 5839-6: 2019 Grade D2
  • Replacement also available for the BRK 690MBX heat alarm
  • An interlinked system provides the earliest possible warning of fire
  • Test and hush button feature
  • Manuacturer's 5 Year Warranty
  • Product warranty and life commences from date of purchase

The simple installation process of the 660MBX replacement alarm negates the need for an electrician, though you must ensure that mains power to all interlinked alarms is turned off before beginning work. The interlink wire can carry a live electric current between alarms if they are powered from different circuits.

Technical Data
Product Code BK66RA
Alternative Product Codes BK660MBX, 660MBX, BK670MBX, 670MBX, BRKEOA
Brand BRK
Back-Up Battery

Replaceable 9V Alkaline

Dimensions (HxDia)

44 x 140mm (including base)

Operating Temperature

+5 °C to +38 °C

Relative Humidity

10% to 85%

Sound Output


Weight 0.27kg
Product Datasheets

Excellent Warranty

This product is supplied with a 5 year manufacturers warranty as standard

Customer Reviews

1 customer has given this product an overall rating of 4 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 4 / 5 Stars

Reviewed by: A D

Does what it says on the box and straight forward to install

Published on: 21st September 2020

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