SMD1812P260TSA

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Polymeric Positive Temperature Coefficient (PPTC or PolySwitch) resettable fuses are classified as non-destructive, resettable, overcurrent protection devices.With a positive temperature coefficient (PTC) of insulation resistance,Polymeric Positive Temperature Coefficient (PPTC or PolySwitch) fuses offers remarkable, fast-acting and reliable overcurrent protection to a wide range of electronic appliances and products.These polymeric positive temperature coefficient fuses, also referred to as PPTC fuses and PolySwitch fuses, combine reliability, high-performance, and low system cost in one.SMD1812P260TSA is one of the PolySwitch Polymeric Positive Temperature Coefficient Resettable Fuses, and it has some very well-defined application fields and working principles.

Application Fields

The SMD1812P260TSA PolySwitch Polymeric Positive Temperature Coefficient Resettable Fuse have the best application fields in low voltage (24V) AC/DC applications. The application fields include:

• Home entertainment equipment
• Communication
• Personal computer portables
• Battery packs
• USB/Firewire portables
• HVAC/Motor control/Drives and more

Working Principle

The working principle of polymeric positive temperature coefficient (PPTC or PolySwitch) resettable fuses is very simple. When the current flowing through the fuse exceeds the standard rating, heat is produced and increases the temperature of the fuse. This increase in temperature reduces the resistance, allowing more current to flow through the fuse, which results in even more heat production. This causes the temperature to increase more, until the point is reached where the fuse opens.The fuse can then be reset by pressing a switch that turns off the power. When the power is turned off, the temperature of the fuse will decrease to the point where it is below the reset temperature. This causes the fuse to reset and the power can be turned back on. SMD1812P260TSA fuses are UL approvied and conforms to CSA, IEC, ETSI, TUV and UL 1061 standards.

Conclusion

The SMD1812P260TSA PolySwitch Polymeric Positive Temperature Coefficient Resettable Fuses provides excellent overcurrent protection for a wide range of electronic appliances and products. Its wide application fields make it an ideal choice for almost any low voltage DC/AC system. Its simple working principle makes it relatively easy to understand and the reliable and fast-acting protection it provides ensures that the system is always secure and safe.

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