Ptc Resettable Fuse

Choosing between a ptc and a fuse overcurrent circuit protection can be accomplished with the use of either a traditional fuse or the more recently developed resettable ptc.

Ptc resettable fuse.

Both devices function by reacting to the heat generated by the excessive current flow in the circuit. Pptc resettable fuses are in stock and ship same day at mouser electronics from industry leading manufacturers mouser is an authorized distributor for many resettable fuse manufacturers including bel bourns eaton littelfuse schurter more. A resettable fuse also known as a ptc is a resistor that has very unique properties. The ceramic ptc thermistor has similar behavior but the resistance variation is not as fast.

5160 rivergrade road baldwin park ca 91706 1406 u s a. The ptc fuse responds with a physical change that inhibits excess current from traveling through the circuit. Package size varies from 0402 to 3425 while hold current ranges from 50ma to 7 0a. 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.

Circuit protection ptc resettable fuses are in stock at digikey. Bourns multifuse polymer positive temperature coefficient pptc resettable fuses are overcurrent protection devices used in a wide variety of circuit protection applications. For this model if your circuit tries to draw more than 250ma of current if you have a bad short for instance the ptc would trip by heating up. The ptc resettable fuse is not meant for high power.

Circuit protection ship same day. Current ratings of up to a few tens of amperes and voltage ratings of up to few tens of volts are feasible. Read more read less. Under fault conditions a polymer ptc s resistance will rise exponentially and remain in a tripped state providing continuous overcurrent protection until the fault is removed.