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What voltage-drop values are expected?

 This depends on the device in question. Typically the voltage drop of the device can be calculated if you know the resistance and the steady-state current flowing through the device. The value to use for the resistance of the JK PPTC(resettable fuse) device is the R1max value to determine maximum voltage drop. A typical voltage drop can be calculated by using the Rmax value or, if that is not supplied, then a value that is the average of Rmin and R1max. If Iop is the normal operating current and Rp is the resistance of the JKPPTC device then the voltage drop in the circuit can be calculated as: Vdrop = Iop x Rp

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