Normally Open (NO) thermal switch – 80°C

The device has a heat-sensitive element that senses the ambient temperature and, once the 80°C threshold is passed, trips the mechanism that closes the contact. Once the temperature falls back below the critical value, the contact opens again automatically, allowing the circuit to be restored.

The NO 80°C thermal switch is commonly used in applications where electric motors, electronic equipment, battery power supplies and electrical installations have to be protected from damage caused by high temperatures. It is particularly useful in devices working in environments with temperature swings, or which could overheat because of a fault.

• Control of fans or cooling systems
  The switch closes the circuit once 80 °C is reached, automatically starting fans or cooling systems.
• Thermal warning (LED or buzzer)
  Used to trigger visual or audible signals (e.g. an LED or a buzzer) warning that the thermal threshold has been passed.
• Logic input for microcontrollers
  It can provide an input signal to a microcontroller when the temperature threshold is exceeded.
• Switching loads on according to temperature
  Fitted in a circuit where a component is to be switched on only when the temperature goes above 80 °C (e.g. heating elements, relays, indicators and so on).

• Sensor material:
  Bimetal: the sensor is made of two metals with different coefficients of thermal expansion; once the trip temperature is reached, the bending of the bimetallic strip opens or closes the electrical contact.
• Reset: automatic (when the temperature drops below the threshold value)

• Datasheet KSD9700