Pptc fuse

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, pptc fuse, overcurrent surge pptc fuse of high reliability electronic equipment, robust resettable fault protection for industrial transportation, communication, security, pptc fuse, and consumer electronic equipment. Type the code from the image. This link will direct you to a web page outside the Bourns app.

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. 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.

By selecting among and accepting to our use of the cookie categories below, you direct Littelfuse to store cookies on your device and disclose information as described in our Privacy Policy. Radial Leaded. The general pptc fuse for resetting the device after an overload has occurred is to remove power and allow the device to cool down, pptc fuse.

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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. A PTC resettable fuse can open electric circuits during fault events like a traditional one-time fuse, but is automatically resettable. A PTC fuse consists of a positive temperature coefficient material whose internal resistance increases exponentially with an increase in operating temperature. In the ON state tripped state , the device offers very high resistance in response to faults such as short-circuit or overheat, thus limits the current flow through the device until the material cools, then reverts to low resistance mode.

Pptc fuse

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. Discover the optimal solution for your specific application. With innovative new technologies, products and solutions, there are more reasons to partner with Bourns than ever before.

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Voltage V. Interrupting Rating PPTCs are rated for a maximum short circuit current at rated voltage also known as "breaking capacity" or Imax. The information these cookies collect may be anonymized and they cannot track your browsing activity on other websites. 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. When you use our website, we collect personal data about you and your use of the Website, through cookies and analytics tools. Read Edit View history. If the overload current is to the left of the curve, the device will not operate. Self-Healing Polymers and Polymer Composites. How satisfied are you with the content? Package size varies from to , while hold current ranges from 50mA to 7. For detailed application assistance please visit our Application Design Center Site. 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.

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 remember that you have visited a website and this information is shared with other organizations such as advertisers. We may also collect personal data such as your name, job title, company name, address, email address and telephone number either directly from you or by combining information we collect through other sources. Littelfuse offers PPTCs with the following general forms and features, and come in a variety of sizes and capacities:. When a PPTC is in a "tripped state" it protects the circuitry by limiting the current flow to a low leakage level. These cookies collect information about how visitors and users use our website, applications, and services. Article Talk. MF-RM Label. A PPTC device has a current rating and a voltage rating. 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. Our surge protection devices SPDs and modules are designed to provide protection from transient overvoltage. At this point read the time tested on the Y-axis. If the device does not open soon enough, the overcurrent may damage downstream components. Delivery Date.