Pptc fuse

These components remove the need for any temperature-based nuisance tripping across pptc fuse such applications, while offering increased, high resistance protection in space-saving surface mount packages. A wider selection of applications include: automobile circuitry protection, pptc fuse, 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.

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.

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. The trip current is the current at which the device is guaranteed to trip. When power is removed, the heating due to the leakage current will stop and the PPTC device will cool. As the device cools, it regains its original crystalline structure and returns to a low resistance state where it can hold the current as specified for the device.

Littelfuse offers PPTCs with the following general forms and features, and come in a variety of sizes and capacities:, pptc fuse.

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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.

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.

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These cookies collect information about how visitors and users use our website, applications, and services. With innovative new technologies, products and solutions, there are more reasons to partner with Bourns than ever before. Our surge protection devices SPDs and modules are designed to provide protection from transient overvoltage. MF-SD Label. If your overload current falls to the right of the curve the device will open. Radial Leaded Specialty Surface Mount. ISBN 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. Littelfuse battery management devices provide methods of conserving battery power, protecting against over-discharge, combining and protecting auxiliary equipment such as liftgate motors. A resettable fuse or polymeric positive temperature coefficient device PPTC is a passive electronic component used to protect against overcurrent faults in electronic circuits. Understanding the differences between the two technologies should make the choice in selection easier, depending on the application. Littelfuse offers PPTCs with the following general forms and features, and come in a variety of sizes and capacities:.

A polymeric positive temperature coefficient device PPTC is a passive electronic component used to protect against overcurrent faults in electronic circuits.

Battery strap resettable PPTCs provide reliable, non-cycling protection against overcharging and short circuits events for rechargeable battery cells where resettable protection is desired. We use cookies to collect information about how you interact with our website and to remember you. Yes No. How satisfied are you with the content? Leakage current can range from less than a hundred milliamps mA at rated voltage up to a few hundred milliamps mA at lower voltages. If your overload current falls to the right of the curve the device will open. As the device cools, it regains its original crystalline structure and returns to a low resistance state where it can hold the current as specified for the device. This website stores cookies on your device. If too much current is passed through the device, the device will begin to heat. Littelfuse offers PPTCs with the following general forms and features, and come in a variety of sizes and capacities: Surface Mount Devices: A full range of compact footprints Low hold current Very fast trip time Low resistance Radial Leaded Series: Protection devices up to Vdc A very high hold current Low trip-to-hold current ratio Low resistance Battery Strap Devices: A narrow low profile design A weldable band Nickel terminal Low resistance—for extended battery run time If your application requirements fall outside of our product range, in certain instances we can offer customized solutions. Radial Leaded. Request Samples. The solutions presented cover both USB 1. Newbery January The information these cookies collect may be anonymized and they cannot track your browsing activity on other websites.