Ptc Resettable Fuse

Circuit protection ship same day.

Ptc resettable fuse.

Surface mount resettable ptc devices provide overcurrent protection for applications where space is at a premium and resettable protection is desired. Bourns multifuse polymer positive temperature coefficient pptc resettable fuses are overcurrent protection devices used in a wide variety of circuit protection applications. Current ratings of up to a few tens of amperes and voltage ratings of up to few tens of volts are feasible. A resettable fuse also known as a ptc is a resistor that has very unique properties.

5160 rivergrade road baldwin park ca 91706 1406 u s a. 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. Read more read less. The ptc resettable fuse is not meant for high power.

The devices generally increase the level of resistance at a specific threshold. 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. Both devices function by reacting to the heat generated by the excessive current flow in the circuit. The ptc fuse responds with a physical change that inhibits excess current from traveling through the circuit.

The ceramic ptc thermistor has similar behavior but the resistance variation is not as fast. 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. Package size varies from 0402 to 3425 while hold current ranges from 50ma to 7 0a. 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.