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PTC Resettable Fuses

PTC resettable fuses are also known as polymeric positive temperature coefficient (PPTC) fuses. This type of fuse is different from traditional fuses in that it is designed to automatically reset after a fault current has cleared. It can be used to protect against short-circuit currents, overcurrent faults and overvoltage protection.

The 1812L150ZR is a popular PTC resettable fuse that is ideal for use in high voltage circuits. It is a surface mount device with a maximum operation temperature of 125°C and a high current rating of 150A. The fuse has a maximum voltage of 450V, with a large thermal stability range and low to medium operating voltage.

Application field

The 1812L150ZR PTC resettable fuse is widely used in a range of applications, including automotive systems, general lighting, solar energy systems, power supplies, renewable energy systems, and industrial equipment.

In automotive applications, the 1812L150ZR can be used to protect electronic controls, navigation systems, HVAC systems, and powertrain systems. In general lighting, it can be used to protect low-and-medium voltage lighting systems, such as LED lamps, downlights, and spotlights.

In solar energy systems, the 1812L150ZR can be used to protect photovoltaic (PV) systems. In power supplies, it can be used to protect AC/DC converters, DC/DC converters, inverters, and chargers. In renewable energy systems, it can be used to protect wind turbines, hydro-electric turbines, and geothermal systems. In industrial equipment, it can be used to protect instrumentation, automation systems, and other sensitive components.

Working principle

The 1812L150ZR PTC resettable fuse is made of a special polymer material, which has a positive temperature coefficient. When a current exceeding the specified rating passes through the fuse, the resistance of the fuse will increase dramatically, which causes the fuse to heat up and trip the circuit. This process is known as fusing. When the fault is cleared and the current drops, the fuse will cool down, the resistance will decrease, and the fuse will reset itself.

The PTC resettable fuse has a larger temperature range, meaning it can operate at higher temperatures than regular fuses. This makes it ideal for use in high-current applications, where regular fuses would not be able to withstand the heat created from large currents.

The 1812L150ZR PTC resettable fuse is also much more reliable than traditional fuses. It can be used in applications where frequent overcurrent faults occur, as the fuse will automatically reset after the fault is cleared. This eliminates the need for regularly replacing fuses, which can be costly and time consuming.

Conclusion

The 1812L150ZR is a popular PTC resettable fuse that is ideal for use in high voltage circuits. It is widely used in a range of applications, including automotive systems, general lighting, solar energy systems, power supplies, and industrial equipment. The fuse is made of a special polymer material, which has a positive temperature coefficient. When a current exceeding the specified rating passes through the fuse, it will heat up and trip the circuit, and when the fault is cleared and the current drops, the fuse will cool down and reset itself.

The 1812L150ZR has a larger temperature range, meaning it can operate at higher temperatures than regular fuses. This makes it ideal for use in high-current applications. It also has a much higher reliability than traditional fuses, as it will automatically reset after the fault is cleared. This makes it an ideal solution for applications where overcurrent faults occur frequently.

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