Normally Open (NO) thermal switch – 50°C

The device features a temperature-sensitive thermal element that detects the ambient temperature and, once the 50°C threshold is exceeded, activates the contact-closing mechanism. Once the temperature drops back below the critical value, the contact reopens automatically, restoring the circuit.

The NO 50°C thermal switch is commonly used in applications where it is necessary to protect electric motors, electronic equipment, battery power supplies and electrical systems from damage caused by high temperatures. It is particularly useful in devices that operate in environments with temperature fluctuations or that could overheat due to malfunctions.

• Fan or cooling system control
  The switch closes the circuit when it reaches 50 °C, automatically activating fans or cooling systems.
• Thermal signaling (LED or buzzer)
  Used to trigger visual or audible signals (e.g. LED or buzzer) that warn when the thermal threshold has been exceeded.
• Logic control for microcontrollers
  Can provide an input signal to a microcontroller when the temperature threshold is exceeded.
• Temperature-based load activation
  Used in a circuit where a component should only be activated when the temperature exceeds 50 °C (e.g. resistors, relays, indicators, etc.).

• Sensor material:
  Bimetal: the sensor is made of two metals with different thermal expansion coefficients; when the activation 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