PPTC self recovery fuse is widely used in power lines, communication lines and I/O ports and other overcurrent protection for communication, security, industry, automotive, consumer electronics and other electronic products. The typical application circuit of PPTC self recovery fuse is shown in Figure 3. The PPTC self recovery fuse is usually connected in series in the circuit, it is applied to the small current power line and some communication lines, such as RS485 interface, RJ11 interface and I/O port.
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(figure for PPTC self recovery fuse typical application circuit)
Characteristics of PPTC self recovery fuse
It is sensitive to current and temperature, and the resistance increases with the increase of temperature and current.
The response speed of PPTC self recovery fuse is slow, which is usually tens of milliseconds or even second level, which is related to the current of PPTC self recovery fuse.
It has self recovery characteristics and can be used repeatedly in circuit within its rated range.
The PPTC self recovery fuse is low resistance in the normal working state of the circuit, and has little effect on the circuit.
In application, the PPTC self recovery fuse is connected in the circuit.
Our PPTC self recovery fuse product maintains a current of 30mA~14A and the maximum voltage is 5V~600V.
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