Timeguard FBT4N 4-hour Electronic Boost Timer and Fused Spur, 13A
The Timeguard FBT4N is an electronic boost timer combined with a fused spur, designed for timed operation of compatible fixed appliances. Five push-button boost choices run from 15 minutes to 4 hours, with automatic switch-off and LED status indicators. The listing recommends installation by a qualified electrician.
At a glance
- Select a quarter, half, one, two or four hours of boost using a push button.
- Automatically switches off when the selected boost period ends.
- LED indicators show the selected setting and output status.
- Combines a timer and fused spur in one unit, intended to replace an existing single-gang connection unit or fixed-appliance outlet.
- The listing names immersion heaters, room heaters, towel rails and lighting as possible applications.
Reference price: £32.99
Price checked: 14 Nov 2026
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Pros and cons
Pros
- Five straightforward timed boost choices require no clock programming.
- Automatic shut-off and visible LED status make the chosen boost and output easier to check.
- Timer and fused spur are combined in one fitting, with flush and surface box mounting options stated.
Cons
- It is a fixed-wiring fitting rather than a plug-in timer, and the listing recommends professional installation.
Technical specifications
18 specifications| Brand | Timeguard |
|---|
| Boost settings | 5 |
|---|---|
| Boost durations | 15 min to 4 Hour |
| Rated load | 13A |
| Standby consumption | under 0.7W |
| Resistive load rating | 13A resistive loads |
| Incandescent or halogen lighting | 1000W incandescent or halogen |
| Fluorescent lighting | 500W fluorescent |
| LED lighting | 200W LED |
| CFL lighting | 100W CFL |
| Fuse type | BS1362 fuse |
| Dimensions listed | 4.2D x 8.5W x 8.5H centimetres |
|---|---|
| Weight listed | 0.16 Kilograms |
| Faceplate | 85 x 85mm |
| Minimum flush wall-box depth | 25mm |
| Cable entry | bottom and back cable entry options |
| Construction and use | Class II construction, IP20 rated for indoor use |
| Colour | White |
|---|
What to know before buying
Listing details to confirm
The listed load limits differ by load type: 13A resistive, 1000W incandescent or halogen, 500W fluorescent, 200W LED and 100W CFL. Confirm the appliance load and installation suitability before purchase. The listing also states IP20 indoor use and recommends installation by a qualified electrician.
Who is it for?
A good fit for
- People needing a manually selected, time-limited boost for a compatible immersion heater or other listed fixed appliance.
- Buyers replacing a single-gang connection unit or fixed-appliance outlet who need a fused spur and timer together.
- Installations with a suitable flush wall box or surface mount pattress box.
Less suited to
- Anyone seeking a plug-in timer, clock-based scheduling or a stated smart-control function.
- Installations where the appliance load exceeds the applicable rating or where the fitting would be used outdoors.
Customer reviews on Amazon
- 5 stars
65% 65% - 4 stars
20% 20% - 3 stars
6% 6% - 2 stars
0% 0% - 1 star
9% 9%
Customer feedback reports that the timer works well, including for controlling hot water, and describes its quality positively. Installation experiences are mixed, with some finding it easy to fit and others finding it fiddly. Opinions on value also differ. For buyers choosing this fixed-wiring timer, the reported fitting difficulty matters alongside the listing's recommendation for a qualified electrician. The rating distribution is mostly five- and four-star, with a smaller but notable one-star share, so experiences are not uniformly positive.
Positive themes
- Customers report good functionality, including use for hot water control.
- Feedback also includes positive comments about quality.
Mixed feedback
- Installation is described as easy by some customers and fiddly by others.
- Customers disagree about value for money.
Frequently asked questions
How long can the boost run?
The listing gives five choices: 15 minutes, 30 minutes, one hour, two hours or four hours. It states that the output switches off automatically when the chosen period ends.
What types of appliance does the listing name?
It names immersion heaters, room heaters, towel rails and lighting. Check the appliance's load against the relevant rating before installation.
Can it fit a flush or surface box?
The listing says it fits a flush wall box with a minimum depth of 25mm or a surface mount pattress box. It also describes bottom and back cable entry options.
Is professional installation recommended?
Yes. The listing recommends installation by a qualified electrician. This is a fixed-wiring fitting, not a plug-in timer.
Alternative options
Timeguard Suretime STBT4 2 Hour Electronic Boost Timer with LED Countdown, 13A 3kW, White
£16.78
Companyblue 1-5 Hour Boost Fused Spur Timer Switch | 13A Countdown Timeswitch | White
£29.95
Timeguard TGBT4N BoostMaster 4 Hour Boost Timer, LED Countdown, 13A 3kW | One-button boost from 15 mins to 4 hours with LED countdown. Switches off automatically. 13A rated, 3 year guarantee.
£17.46
Smart WiFi Fused Spur Timer Switch for Immersion Heaters, Electric Towel Rails, Storage Heaters & Lighting - 13A Timer Switch with Power Monitoring | Alexa & Google Voice Control | No Hub Required
£39.99
Optimum Energy Saving Electronic Time Switch - 2 Hour Electronic Boost Timer Socket Box Mount - White, One 230 V
£18.91
