Positive Temperature Coefficient (PTC) resettable fuses are simple, cost-effective overcurrent protection devices. These thermistor-based components protect circuits and downstream components against too much current due to an overload or short circuit fault condition. PTCs are compact, self-resetting fuses that provide reliable circuit protection by transitioning to a high resistance state during a fault condition to limit current from damaging downstream components; upon removal of the fault, they will reset by returning to a low resistance state. Resettable PTCs are passive devices in that they do not require an external power source to limit current.
Resettable PTC fuses are found in a wide range of electronic circuits, including rechargeable battery systems, notebook computing, automotive electronics, DC motors, I/O & USB ports, wearable devices, industrial IoT/PLCs & computing, memory modules, consumer electronics, displays and set top boxes, plus many other applications.
Eaton’s PTS family of polymer PTC (PPTC) resettable fuses are resettable overcurrent protection devices. These SMT resettable devices with low resistance and fast time-to-trip. They are offered in four different footprints from 0603 up to 1812 EIA and voltage ratings up to 60Vdc.
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Eaton’s PTSA family of resettable polymer PTC (PPTC) fuses are polymeric positive temperature coefficient overcurrent protection devices. They are AEC-Q200 qualified products in footprints from 0805 to 1812 EIA with hold currents ranging from 100 mA to 2.6 A and all voltage ratings above 13 V, ideally suited for automotive applications. The PTSAHT are a select group of high-temperature PPTCs capable of withstanding operating temperatures up to +125 °C and offer hold currents from 100 mA up to 500 mA.
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Eaton’s PTSLR family of resettable polymer PTC (PPTC) fuses are polymeric positive temperature coefficient overcurrent protection devices. They feature ultra-low resistances, down to 0.001 Ω, for high efficiency operation and are available in five footprints, from 0603 up to 1812 with hold current ratings up to 7.5A.
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Eaton Bussmann® Series positive temperature coefficient (PTC) resettable device surface mount kits are offered in a wide variety of values to allow an engineer to pick and choose the best part for the design.
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Eaton’s PTR family of polymer PTC (PPTC) resettable are polymeric positive temperature coefficient resettable overcurrent protection devices are offered in three different families, each corresponding to its respective 16, 30 and 60 Vdc. They offer fast time-to-trip and low resistance. Current ratings from 0.90A up to 15A for a wide variety of circuit protection applications.
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Eaton Bussmann® Series positive temperature coefficient (PTC) resettable device radial lead kits are offered in a wide variety of values to allow an engineer to pick and choose the best part for the design.
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Eaton Bussmann® Series positive temperature coefficient (PTC) resettable device surface mount kits are offered in a wide variety of values to allow an engineer to pick and choose the best part for the design.
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Eaton Bussmann® Series positive temperature coefficient (PTC) resettable device radial lead kits are offered in a wide variety of values to allow an engineer to pick and choose the best part for the design.
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Eaton Bussmann® Series positive temperature coefficient (PTC) resettable fuses are circuit protection devices providing overcurrent and overtemperature protection in a variety of applications. Eaton PTC resettable fuses can limit damaging conditions during fault events like one-time fuses, but are resettable, allowing them to achieve multiple uses over the product’s lifetime. Application Guide will provide details on how a PTC functions and key parameters.
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Eaton Bussmann® Series positive temperature coefficient (PTC) resettable fuses are circuit protection devices providing overcurrent and overtemperature protection in a variety of applications. Industry standard package footprint sizes allow for Eaton PTC resettables to be used in already designed applications.
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Eaton Bussmann® Series positive temperature coefficient (PTC) resettable fuses ensure constant uptime in applications where using one-time fuses would be impractical or expensive, e.g., in battery-powered devices, industrial controllers, medical devices, and I/O ports of consumer electronics. Selection Guide shows all available package and ratings offered by Eaton.
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Eaton Bussmann® Series White Paper goes over the basic working mechanics positive temperature coefficient (PTC) resettable fuses. This document includes a comparison to traditional One-Time fuses and how to leverage this reliable overcurrent protection technology.
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