The SBBRKHE easichange® kit replaces the discontinued BRK 690MBX heat alarm and fits onto your existing BRK twist-fit alarm baseplate so there's no need for any DIY or an electrician. The kit consists of the replacement heat alarm head with pre-connected easichange® adaptor, an easichange® removal tool, a quick change guide, and the full alarm manual.
The SBBRKHE is a mains powered heat alarm with a replaceable 9V alkaline backup battery like the 690MBX that it replaces. Heat alarms detect the temperature of the room they're in and activate when it gets abnormally hot, typically from 55°C. They are designed for rooms like kitchens and garages where steam, fumes, and dust are expected to cause false activations in smoke alarms. Featuring a hardwire interlink, compatible easichange® alarms communicate with each other over the same wiring as your old BRK alarms, so that all will sound the alarm if one detects a fire.
The simple installation process of the easichange® replacement kits negates 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.
Please Note: We recommend replacing all alarms in the system together to maintain optimum system operation; failing to do so may compromise interlink performance.
All of our product reviews are written by real customers that have purchased this product from us and are published without modification.
D C
8th April 2026
A R
5th April 2026
Perfect - exactly as described
S T
30th March 2026
Didn’t realise the detector was so big it’s hang down a lot more than the existing detector that it replaced it will take a bit of time to get used to how big it is.
M P
17th December 2025
Easy to fit
K R
27th May 2025
fits well
| Product Code | SBBRKHE |
|---|---|
| Brand | easichange |
| Manufacturer's Part Number | THS893A-HI |
| Approvals & Markings | CE Marked |
| UKCA Marked | |
| Back-Up Battery Type | Alkaline |
| Battery Type | 9V Battery |
| Alkaline | |
| British Standard Grade | Grade D2: Mains Powered (replaceable backup) |
| Colour | White |
| Compliance | BS 5446-2: 2003 |
| Connection | Wired |
| Display | LED Indicators |
| Fixing Options | Screws (included) |
| Installation Position | Ceiling |
| Material | Plastic |
| Maximum Number of Linked Devices | 12 Devices |
| Operating Temperature | 0°C To +40°C |
| Positioning | Garages |
| Kitchens | |
| Power Type | Mains Powered (230V) |
| Recyclable | Yes - Valpak's WEEE Distributor Take-back Scheme |
| Relative Humidity | Up To 93% |
| Sensor Type | Heat |
| Sound Level | 85dB |
| Suitability | Home |
| Warning Type | Audible - Alarm Sounder |
| Warranty | 3 Years |
| Dimensions (Unit) |
|
| Weight | 500g |
| Datasheets |
The simple installation process of the easichange® replacement kits, described below, negates 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.
It is important to select the correct easichange® alarm to replace your obsolete BRK models. The table below will help you select the correct replacement alarm. Please note that you can replace your existing BRK optical and ionisation alarms with an easichange optical alarm, however your BRK heat alarm can only be replaced with an easichange heat alarm. Please see for assistance in determining your model.
Please Note: We recommend replacing all alarms in the system together to maintain optimum system operation; failing to do so may compromise interlink performance.
|
BRK Model |
Alarm Type |
Base Type |
Easichange® Replacement |
|---|---|---|---|
|
Smoke, Optical, Alkaline backup battery |
Twist |
||
|
Smoke, Ionisation, Alkaline backup battery |
Twist |
||
|
Heat, Alkaline backup battery |
Twist |
Very quick delivery and quick to install