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Choosing the Best Circuit Protection
Leakage current : The PTC is said to have tripped when it has transitioned from the low resistance state to the high resistance state due to the overload.
A survey of output filter topologies to minimize the impact of PWM inverter waveforms on three-phase AC induction motors
Figure 5 illustrates the potential-type suppression circuit ( PTC ) for reducing the leakage current in the high-frequency carrier inverter[5].
Device performance and yield — A new focus for ion implantation
The results (figure 4) show a dramatic reduction in leakage current at the lower temperature ( PTC II is VSEA’s trade name for cryogenic implant).
Electric Fuses
PTC devices require a low joule heating leakage current or external heat source in order to maintain their tripped condition.
Resettable PTCs - Littelfuse
This fault current level is the maximum current that the device can withstand safely, keeping in mind that the PTC will not actually interrupt the current flow (see Leakage Current above).
http://www.mouser.com/catalog/supplier/library/pdf/LittlefuseFusesSelGuide.pdf
PTCs will not actually interrupt the current flow (see LEAKAGE CURRENT above), whereas fuses do interrupt the current flow in response to the overload.
Reuse of existing design information in the development of new electronic PTC devices via a neural network approach
In addition, current leakage through a micro- scopic discharge of voltage across a PTC device may cause self- burning of the PTC device in the form of arcing, flame, or flash, and the occasional occurrence of the negative temperature coef- ficient (NTC …
Low-loss Electronic Starter for Single-Phase Compressors
The PTC behaves then like a switch at OFF state, but with a high leakage current , resulting in high power losses (approx. 2.5W).
Design and Implementation of Fully-Integrated Inductive DC-DC Converters in Standard CMOS
In the on-state the on-resistance will be prone to a PTC -effect and in the off-state the MOSFET switches will introduce a leakage current , which increases with their temperature.
Effective remote control of electric motors using GSM technology
… external switches, the thermal capacity remaining, the red/white and blue current percentage registers, the current voltage level, the current earth leakage level, alarm flags that will indicate any current alarms, trip flags that … … positive temperature co- efficient ( PTC ) level in ohms, the …

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