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STBT4 Suretime 2 Hour Electronic Boost Timer

Suretime’s STBT4 gives you security in relation to not forgetting to switch off your lighting circuit, heating circuit or any other compatible appliance connected. With the simple push to make operation of the boost button, the STBT4 can provide power from 15 minutes to 2 hours with each press doubling the on time of your load before counting down and switching off automatically.

  • Automatic timer countdown for up to 2 hours.
  • Cancellation of countdown time by pressing the boost button mid-cycle.
  • Bright illumination of the boost button at all times.
  • Minimalist and simple to use!
  • LED indicators for approximate time left on countdown.
  • Ideal for immersion control systems not racking up a huge bill.
  • Fits a standard flush or surface BS wall box with 25mm depth.
  • Suretime logo
  • ST LEDs up to 80W
  • ST 2 Year Guarantee


Operating Voltage230V AC 50Hz
Operating Temperature0°C to +45°C
Earth ClassClass II
IP RatingIP55
Switch Rating13A Resistive (3kW), 80W LED 1000W Halogen lighting, 500W Fluorescent lighting, 100W Low energy lighting. Not suitable for discharge lighting or inductive loads.
Wall Box Depth25mm
Contact TypeNormally Open
Boost Times¼, ½, 1, 2, hours
Power StatusLED indicator
Fused Unfused
DimensionsHeight 85mm, Width 85mm, Depth 31mm

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