Which components are mainly supported by circuit protection? Circuit protection devices mainly include: overvoltage protection devices, overcurrent protection devices, and overtemperature protection devices.
Overvoltage protection device (OVP): used to protect subsequent circuits from load dumping or transient high voltage damage. Commonly used overvoltage protection devices include varistors, transient voltage suppressors (TVS), electrostatic suppressors, and discharge tubes, etc. . Such as: transient suppression diode (TVS, also called transient voltage suppressor), ESD suppressor, ceramic gas discharge tube, etc.
Overcurrent protection devices: Overcurrent protection devices mainly include disposable fuses, self-recovery fuses, fusing resistors and circuit breakers, among which the most important overcurrent protection devices are fuses, also called fuses.
Over-temperature protection devices: mainly include thermistors, temperature switches and temperature fuses, etc. NTC thermistor type surge suppressors are often used for over-temperature protection in power supply design, because their ability to suppress surge current is equivalent to that of ordinary resistors, but the power consumption on the resistor can be reduced by tens to hundreds of times.
Examples of protection devices include: self-recovery fuses, current fuses, ceramic gas discharge tubes, varistors, transient suppression diodes, and power surge arresters.
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