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A disposable thermal fuse is a device used for circuit protection, mainly used to prevent equipment from being damaged or causing fire due to overheating. It cuts off the circuit through a fuse mechanism when the temperature exceeds the set value, thereby protecting the equipment.
Feature
- Extremely sensitive to ambient temperature
- Precise and stable operating temperature
- Compact,epoxy-sealed construction
- Reliable performance
- Manufactured under strict quality control procedures
- Approved by various international safety standard like TUV CB KC PSE CCC and so on.
Operating Principle
Pellet type thermal cutoff--when ambient temperature of the thermal cutoff reaches to its operating temperature, the pellet melts, spring A expand, and move the slide contact away from lead A. Then, the electrical circuit is permanently cut off.
- Temperature Sensing: The thermal fuse contains a thermistor pill inside. When the temperature reaches the set value, the pill melts or deforms.
- Fusing Mechanism: After the pill melts, the internal mechanical structure disconnects the circuit and prevents the current from continuing to flow.
- Disposable Use: Once the fuse is blown, it cannot be restored and must be replaced.
RY Type
RY thermal fuse adopts a metal shell with temperature-sensitive particles(Organic chemistry) as a temperature fuse sense element the struc-ture of temperature sensing material is energized, the internal impedance is small with cutoff current up to 6A to 15A(AC) specialty.
There are opening electrode, spring, sensitive particles in the metal case of RY thermal fuse. The barrel type spring is compressed to be installed into the case, it can contact the lead wire with the help of gasket, Under normal conditions, the electricity flows through the lead wire, opening electrode, metal case and rivet wire.
When the ambient temperature exceeds the operating temperature, the sensitive particles will melt by the heat from the lead wire. Under this condition, the opening spring will be pulled apart and the elastic force will push the electrode to the spring to cut the connection with lead wire.The current will be cut off as well.
Main Features
- Accurate Temperature Control: Set the fuse temperature according to the equipment requirements.
- Quick Response: Quickly cut off the circuit when the temperature exceeds the standard.
- High Reliability: Simple structure and stable performance.
- Strong Safety: Effectively prevent fire or equipment damage caused by overheating.
Application Fields
- Household appliances: Electronic iron, Hair dryer, Heater, Coffee maker, Water dispenser, Baker, Electric cooker, Electric pressure cooker, Electric kettle, Microwave oven, Air-conditioner, Refrigerators, Washing machine, Water heater, Range hood, Disinfection cabinet and so on.
-0ffice Appliance: Photocopier, Fax machine, Scanner Printer, Paper shredder
-Appliances Accessories: Voltage transformer, Adapter, Electric motors, PC boards, Connector and so on.
-Electronics Components: Capacitor,Resistor,Batteries and so on.
-Industrial Equipment: such as motors, transformers, etc.
-0thers: Massage appliances, Pharmaceutical equipment, Electronic toys andso on.
Notes
- Correct selection: Choose the appropriate model according to the operating temperature and current of the equipment.
- Installation location: It should be installed in a location that is prone to heat.
- Regular inspection: Ensure that it works properly and replace the blown parts in time.
Disposable thermal fuses are important circuit protection devices that prevent equipment from overheating through a fusing mechanism and are widely used in home appliances, electronics and industrial equipment.
