PTGL9SAS3R3K4B51B0

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PTC Resettable Fuses have been around since the 1970s, but they are becoming increasingly important as electrical circuits require protection from both over current and overheating conditions. The PTGL9SAS3R3K4B51B0 PTC Resettable Fuse is a one time over-current fuse that offers maximum protection from both over current and overheating. Its resettable design provides repeatable protection from over-current and overheating without the need to replace the fuse. This PTC resettable fuse is designed to meet UL/CSA, UL195 & UL1998 safety standards and can be used in a variety of applications.

The general application fields for PTC Resettable Fuses are mainly found in portable electronic equipment such as cell phones, laptops, hand-held medical devices, and battery powered power tools. The PTGL9SAS3R3K4B51B0 PTC Resettable Fuse is also suitable for a wide range of commercial and industrial electronic equipment including industrial automation systems, industrial computers and instrumentation. Additionally, it can be used in telecommunication and automotive circuits, providing protection from currents up to 5A.

The working principle of the PTGL9SAS3R3K4B51B0 PTC Resettable Fuse is based on the principle of the positive temperature coefficient of resistance. The fuse is made up of a small metal film sandwiched between two insulated layers. When the electrical current across the fuse increases, the temperature of the metal film increases and its resistance rises. This rise in resistance causes the fuse to open and current flows are cut off, protecting the circuit from overload and temperature rise. Once the current is reduced to normal levels, the temperature of the metal film returns to normal and its resistance returns to its original level, allowing the circuit to be reset and the circuit to resume normal operation.

The PTGL9SAS3R3K4B51B0 PTC Resettable Fuse is a cost-effective solution for protecting circuitry from extreme currents and temperature rises. Its resetting technology eliminates the need for replacement fuses and provides an effective way to protect sensitive electronic devices from operational and safety hazards. With its wide range of applications and easy resetting mechanism, this resettable fuse can be a great addition to any modern electrical circuit.

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