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Fuse Self Resetting

Fuse Self Resetting

A polymeric positive temperature coefficient device (PPTC, commonly known as a resettable fuse, polyfuse or polyswitch) is a passive electronic component used to protect against over current faults in electronic circuits

PTC fuses reach a high resistance with a low holding current under fault conditions and cycle back to a conductive state after the current is removed, acting more like circuit breakers, allowing the circuit to function again without opening the chassis or replacing anything

These devices are often used in computer power supplies, largely due to the PC 97 standard (which recommends a sealed PC that the user never has to open), and in aerospace/nuclear applications where replacement is difficult. Another application for such devices is protecting audio loudspeakers, particularly tweeters, from damage when over driven: by putting a resistor or light bulb in series with the PPTC device it is possible to design a circuit that limits total current through the tweeter to a safe value instead of cutting it off, allowing the speaker to continue operating without damage when the amplifier is delivering more power than the tweeter could tolerate. While a fuse could also offer similar protection, if the fuse is blown, the tweeter cannot operate until the fuse is replaced.

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Fuse Resetting Reset 0.05A 60V
Fuse Resetting Reset 0.05A 60V ..
R3.90
Ex Vat: R3.39
Fuse Resetting Reset 0.1A 60V
Fuse Resetting Reset 0.1A 60V ..
R3.00
Ex Vat: R2.61
Fuse Resetting Reset 0.2A 200mA 60V
Fuse Resetting Reset 0.2A 200mA 60V ..
R3.00
Ex Vat: R2.61
Fuse Resetting Reset 0.3A 60v
Fuse Resetting Reset 0.3A 60v ..
R3.00
Ex Vat: R2.61
Fuse Resetting Reset 0.5A 500mA 60V RXE050
Fuse Resetting Reset 0.5A 500mA 60V RXE050 ..
R3.00
Ex Vat: R2.61
Fuse Resetting Reset 1.1A 60V
Fuse Resetting Reset 1.1A 60V ..
R3.60
Ex Vat: R3.13
Fuse Resetting Reset 2.5A 30V
Fuse Resetting Reset 2.5A 30V ..
R3.00
Ex Vat: R2.61
Fuse Resetting Reset 250mA 60V
Fuse Resetting Reset 250mA 60V ..
R3.00
Ex Vat: R2.61
Fuse Resetting Reset 3A 30V
Fuse Resetting Reset 3A 30V ..
R7.50
Ex Vat: R6.52
Fuse Resetting Reset 5A 30V
Fuse Resetting Reset 5A 30V ..
R6.90
Ex Vat: R6.00
Fuse Resetting Reset 6A 30V
Fuse Resetting Reset 6A 30V ..
R6.90
Ex Vat: R6.00