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Immersion & General Purpose Timeswitches

FBT4N 4 Hour Electronic Boost Timer and Fused Spur

BoostMaster Fused Spur Countdown Switches now added to the range providing timed output protected by a BS1362 fuse switch. Automatic timed countdown selections using simple push button programming with clear LED output status. Simply replace existing single gang connection units or fixed appliance outlets.

  • Automatic timer countdown selection for up to 4 hours – 13A (3kW) loading.
  • Ideal for immersion heaters, room heaters, towel rails and lighting.
  • Replaces existing single gang connection unit or fixed appliance outlets. box min. 25mm deep.
  • Up to 5 on times can be selected: ¼ hour, ½ hour, 1, 2 and 4 hours.
  • Easy push button selection with clear LED output status.
  • Provides timed output protected by a BS1362 fuse switch.
  • Fits a standard flush or surface mount BS wall box min. 25mm deep.
Fbt4n catalog2
  • Energy Saving 2015
  • LEDs up to 200W
  • 3 Year Guarantee


Timer Mode Boost
Setting Type Digital
Contact Type Normally open
Operating Voltage 230V AC
Switch Rating 230V AC 13A (3kW) resistive, 1000W Filament lighting, 500W Fluorescent lighting 200W LED lighting, 100W CFL lighting
Operating Temperature 0 to 45ºC
Wall Box Minimum depth 25mm
EC Directives Conforms to Latest Directives
Dimensions (mm) Width 85, Height 85, Depth 31

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