Pptc fuse

These components remove the pptc fuse for any temperature-based nuisance tripping across all such applications, while offering increased, high resistance protection in space-saving surface mount packages.

Capacitors boosts the current and increases the power factor to an electrical motor. Search for the part s number you wish to receive samples. Or, visit the sample center page. PPTCs increase resistance as temperature increases due to increased flow. Designed to limit unsafe currents while allowing constant safe current levels, resistance will "reset" automatically when the fault is removed and temperature returns to a safe levels. Surface mount resettable PPTC devices provide overcurrent protection for applications where space is at a premium and resettable protection is desired.

Pptc fuse

A resettable fuse or polymeric positive temperature coefficient device PPTC is a passive electronic component used to protect against overcurrent faults in electronic circuits. The device is also known as a multifuse or polyfuse or polyswitch. They are similar in function to PTC thermistors in certain situations but operate on mechanical changes instead of charge carrier effects in semiconductors. These devices were first discovered and described by Gerald Pearson at Bell Labs in and described in US patent 2,, A polymeric PTC device is made up of a non-conductive crystalline organic polymer matrix that is loaded with carbon black particles [2] to make it conductive. While cold, the polymer is in a crystalline state, with the carbon forced into the regions between crystals, forming many conductive chains. Since it is conductive the "initial resistance" , [3] it will pass a current. If too much current is passed through the device, the device will begin to heat. As the device heats, the polymer will expand, changing from a crystalline into an amorphous state. A small leakage current still flows through the device and is sufficient to maintain the temperature at a level which will keep it in the high resistance state. Leakage current can range from less than a hundred mA at rated voltage up to a few hundred mA at lower voltages. The device can be said to have latching functionality.

Ambient temperature effects are in addition to the normal rerating. There are cookies which are needed for our website, applications or services to pptc fuse properly.

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These components remove the need for any temperature-based nuisance tripping across all such applications, while offering increased, high resistance protection in space-saving surface mount packages. A wider selection of applications include: automobile circuitry protection, overcurrent surge protection of high reliability electronic equipment, robust resettable fault protection for industrial transportation, communication, security, and consumer electronic equipment. Type the code from the image. This link will direct you to a web page outside the Bourns app. Do you wish to proceed? Yes No. Contact Us Careers My Bourns. Markets Markets.

Pptc fuse

Capacitors boosts the current and increases the power factor to an electrical motor. Search for the part s number you wish to receive samples. Or, visit the sample center page. PPTCs increase resistance as temperature increases due to increased flow. Designed to limit unsafe currents while allowing constant safe current levels, resistance will "reset" automatically when the fault is removed and temperature returns to a safe levels. Surface mount resettable PPTC devices provide overcurrent protection for applications where space is at a premium and resettable protection is desired. Package size varies from to , while hold current ranges from 50mA to 7. Radial leaded resettable PPTCs are designed to provide overcurrent protection for applications where space is not a concern and resettable protection is preferred. Battery strap resettable PPTCs provide reliable, non-cycling protection against overcharging and short circuits events for rechargeable battery cells where resettable protection is desired.

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Leakage current can range from less than a hundred milliamps mA at rated voltage up to a few hundred milliamps mA at lower voltages. Dissipate high voltage transients through a contained plasma gas with high surge capability, low capacitance and small size. As the device heats, the polymer will expand, changing from a crystalline into an amorphous state. PPTCs are rated for a maximum short circuit current at rated voltage also known as "breaking capacity" or Imax. Littelfuse offers PPTCs with the following general forms and features, and come in a variety of sizes and capacities:. Provide a complete, one-piece solution for easy procurement and code compliance. Archived from the original PDF on 22 January Magnetic sensing products utilizing Reed and Hall Effect technologies, with custom solutions available. See Data Sheet. Battery Strap. Request Report.

A polymeric positive temperature coefficient device PPTC is a passive electronic component used to protect against overcurrent faults in electronic circuits. Simply put, a PPTC device, also known as a multifuse or polyfuse or polyswitch, is actually a resettable fuse! Positive temperature coefficient PTC resettable fuse is a circuit protection device which provides overcurrent and overtemperature protection in a variety of applications.

Leakage current can range from less than a hundred milliamps mA at rated voltage up to a few hundred milliamps mA at lower voltages. These cookies collect information about how visitors and users use our website, applications, and services. The ability of PPTCs to reset themselves after exposure to a fault current makes them ideal within circuits that are not easily accessible to a user or technician or where constant uptime is required. Hidden categories: Articles with short description Short description matches Wikidata Articles needing additional references from January All articles needing additional references All articles with unsourced statements Articles with unsourced statements from January When a PPTC is in a "tripped state" it protects the circuitry by limiting the current flow to a low leakage level. They may also be used to provide services you have asked for. Fuse Block, Fuse Holder and Fuse Accessories Fuse Block Fuse Holder and Fuse Accessories Littelfuse offers a comprehensive line of fuse blocks, fuse holders, and fuse accessories for automotive, electronic, and electrical markets. PPTCs are typically used in a wide variety of telecom, computer, consumer electronics, battery and medical electronics product applications where overcurrent events are common and automatic resettability desired. If the device does not open soon enough, the overcurrent may damage downstream components. Compare the maximum dimensions of the device to the space available in the application. Ensure that the application voltage is less than or equal to the device's rated voltage and that the operating temperature limits are within those specified by the device. Product Series. Markets Markets.