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Bulb & Capillary Thermostats

Capillary thermostat is manual reset thermal protector.

It has the advantages of accurate temperature control, great contact capacity and high safety.

It is used as a protector of all-pole disconnection, which is suited for electric heater, water heater, water boiler and so on.

Highly recommended products from other switch series:

Kettle Thermostats | Stem Type Thermostat



Technical Specifications

No.Main Parameters
1Cut-out temperature -40°C ~ 320°C ±5℃
2Capillary length300mm~3000mm
3Current/Voltage380VAC 16A, 250VAC 16A.
4Electric intensityAC2500V/MIN
5Insulation resistance≥50MΩ
6Contact resistance<30MΩ
7Lifetime test100,000 cycles


  • Accurate temperature control;
  • Great contact capacity;
  • Wide control range;
  • High reliability.


  • Precise temperature control and fast reaction time
  • Customized various temperature ranges according to requirements
  • Factory preset fixed temperature, OEM adjustable or end user knob adjustable temperature
  • Temperature regulation and safe cutoff


  • Electric Storage Water heater
  • Electric Instantaneous Water Heater
  • Solar Water Heater
  • Commercial Water Heating Appliances


Thermoer offer some commonly used switches, of course our Bulb & Capillary Thermostats must be applied to our own heating element products.

Please ask us for the latest price and customize the electric heating elements you need.

Hot Water Liquid Grey Capillary Thermostat Switch For Household Appliances
  • Temperature range: 75-130℃
  • Type: Capillary
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