Polyswitch resettable 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, polyswitch resettable fuse. They are similar in function to PTC thermistors in certain situations but operate on mechanical changes instead of charge carrier effects in semiconductors.

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?

Polyswitch resettable fuse

I Classification. III Principle of Action. IV Technical Standard. V R esettable F use S election. VI Applications. Resettable fuses can be divided into 2 types according to materials:. Polymer PPTC ;. Ceramic CPTC. According to the package form, it can also be divided into 2 kinds:. Lead plug;. SMD patch. The main advantages of polymer PPTC are:. PPTC can be connected in series in delicate circuits as a resettable thermal fuse for overcurrent protection. The resistance changes fast, in the order of several milliseconds, with small heat capacity, and short recovery time.

Surface mount resettable PPTC devices polyswitch resettable fuse overcurrent protection for applications where space is at a premium and resettable protection is desired, polyswitch resettable fuse. Reliable standard and thermal protected varistor, available in a variety of forms, surge current capability up to 70, Amp. The information these cookies collect may be anonymized and they cannot track your browsing activity on other websites.

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.

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.

Polyswitch resettable 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.

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Unsourced material may be challenged and removed. The current used for radio communication is larger than that of mobile phone batteries and smaller than that of laptop computers. Archived from the original PDF on 22 January The time from the overcurrent occurrence to the completion of the action. Information Center Technical Resources. Leakage current can range from less than a hundred mA at rated voltage up to a few hundred mA at lower voltages. For example, these cookies remember your preference not to be tracked and identify trusted web traffic. Essential Performance and analytical technologies Functionality Targeting or advertising. Select a PTC resettable fuse. Enter the competitor part number here. During an overcurrent event, a Polymer PPTC will heat and expand, which in turn causes the conducting particles to break contact and stop the current. If you do not direct us to collect any categories of cookies, a single essential cookie will be used in your browser to remember your preference not to be tracked.

Capacitors boosts the current and increases the power factor to an electrical motor.

According to the package form, it can also be divided into 2 kinds:. Lead plug;. PTC Effect. However, blocking some types of cookies may impact your experience of the site and the services we are able to offer. This application brief demonstrates how to ensure reliable and safe circuit operation of USB products, protection against voltage and current transients must be carefully considered. It's the maximum operating current of the polymer PTC resettable fuse for safe operation in the limited state, that is, the current withstand value of the thermistor. Products Products Blog Components. Recommended Article s :. Browse this column to find a value equal to or greater than the standard operating current of the circuit. While a fuse could also offer similar protection, if the fuse is blown, the tweeter cannot operate until the fuse is replaced. Need the Littelfuse equivalent to a competitor part?