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Replacement for DETA 1151 & 1153 Mains Powered Smoke Alarms

Discontinued Product

The manufacturer has withdrawn from the European market and is no longer supplying compatible alternatives. Since it is not possible to interlink alarms from different manufacturers, the recommended replacement for the whole discontinued DETA 1150 range is the Kidde Firex series.

alternative product

Kidde Firex Mains Powered Alarms with Alkaline Battery

  • 230V mains powered with alkaline back-up battery
  • Available in Ionisation, 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 the 2022 Scottish legislation

£17.75 inc VAT

£14.79 ex VAT

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Product Overview

The DETA 1151 and 1153 are mains powered smoke alarms with alkaline back-up batteries and have now been discontinued by the manufacturer. To ensure that owners of existing DETA 1150 systems can continue to use their current wiring, BRK have developed their 660MBX range to be fully compatible with your outgoing and remaining DETA alarms and bases. They are guaranteed to fit directly onto your existing bases so an electrician is not required.

The BRK 660MBX is an optical smoke alarm with replaceable alkaline battery backup. The thermally enhanced optical sensor is designed for use in hallways, bedrooms, landings and living areas, as well as rooms adjacent to kitchens or in rooms with open fires. Older alarms, particularly those with ionisation sensors, can be triggered by cooking fumes – the optical sensor in the 660MBX will reduce this significantly.

  • Power: 230V mains powered with back-up battery
  • Back-up Battery: 9V alkaline back-up battery (included)
  • Warranty: 5 year manufacturer's warranty
  • Fits onto your existing DETA alarm push-fit base
    • BRK twist-fit base included to keep as a spare
  • Suitable for living rooms, bedrooms and downstairs hallways
  • Optical sensor provides quick detection of slow, smouldering fires
  • CE and Kitemarked to BS EN 14604: 2005
  • Performs its own self-checks every 48 seconds to ensure the alarm is functioning correctly
  • Test and silence button feature
  • Other DETA / BRK replacement kits are available to cover the full DETA 1110 and 1150 series
  • Product warranty and life commences from date of purchase

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

Compatible Alarms

Below is a table of all alarms which can be interchanged using the same base plate and interlink system. Care should be taken to ensure the correct model is purchased to replace existing alarms. Optical smoke alarms can be used in place of ionisation smoke alarms, but heat alarms and smoke alarms serve different purposes and cannot be swapped.

Original Model Type of Alarm Replacement Model
DETA 1111 Ionisation Smoke Alarm with Alkaline Battery and Twist Base DT11RA
DETA 1113 Optical Smoke Alarm with Alkaline Battery and Twist Base DT11RA
DETA 1115 Heat Alarm with Alkaline Battery and Twist Base DT15RA
DETA 1151 Ionisation Smoke Alarm with Alkaline Battery and Push Base DT51RA
DETA 1153 Optical Smoke Alarm with Alkaline Battery and Push Base DT51RA
DETA 1155 Heat Alarm with Alkaline Battery and Push Base DT55RA
Technical Data
Product Code DT51RA
Alternative Product Codes DETA1151, DETA1153, 1151, 1153, BRKEOA, BRK660MBX
Brand DETA
Back-Up Battery

Replaceable 9V Alkaline

Dimensions (HxDia)

44 x 140mm

Operating Temperature

+5 °C to +38 °C

Relative Humidity

10% to 85%

Sound Output


Weight 0.27kg
Product Datasheets

Key Product Features

Slim profile for minimum intrusion on your ceiling

Piercing 85dB alarm sounder

Combined Test-Hush button to check function & silence alarms

Made by the original alarm manufacturer

What's Included?

Every DETA DT51RA is supplied with the following components.

  • 1 x BRK 660MBX optical alarm
  • 1 x Spare twist-fit base
  • 1 x 9V replaceable alkaline battery
  • 1 x Screw fixing set (screws & rawl plugs)
  • 1 x Instruction manual

Excellent Warranty

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

Customer Reviews

4 customers have given this product an overall rating of 5 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: 5 / 5 Stars

Reviewed by: T G

An excellent replacement unit very easy to fit

Published on: 2nd November 2020

Rating: 5 / 5 Stars

Reviewed by: J J

Impressed, easy to install

Published on: 9th August 2020

Rating: 5 / 5 Stars

Reviewed by: J G

Easy to install Great service

Published on: 3rd August 2020

Rating: 5 / 5 Stars

Reviewed by: P P

Great product easy to fit straight onto Deta base

Published on: 8th January 2020

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