Ptc Resettable Fuse

A positive temperature coefficient ptc resettable fuse protects electronic devices in the event that excessive current or heat is generated.

Ptc resettable fuse.

The devices generally increase the level of resistance at a specific threshold. Package size varies from 0402 to 3425 while hold current ranges from 50ma to 7 0a. 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. The ptc fuse responds with a physical change that inhibits excess current from traveling through the circuit.

Read more read less. 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. A resettable fuse also known as a ptc is a resistor that has very unique properties. Circuit protection ptc resettable fuses are in stock at digikey.

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. Both devices function by reacting to the heat generated by the excessive current flow in the circuit. 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. Surface mount resettable ptc devices provide overcurrent protection for applications where space is at a premium and resettable protection is desired.

5160 rivergrade road baldwin park ca 91706 1406 u s a. Current ratings of up to a few tens of amperes and voltage ratings of up to few tens of volts are feasible. Circuit protection ship same day. The ceramic ptc thermistor has similar behavior but the resistance variation is not as fast.