Defective cards or foreign objects placed into the reader
can cause a short-circuit and permanently damage the reader.
Solution: PolySwitch devices.
PolySwitch devices limit the flow of dangerously high currents during fault conditions and reset back to normal operating mode once the fault condition is removed.
Problem: Transient Surge Voltages and Electrostatic Discharge (ESD)
Transient surge voltages caused by equipment switching operations and also electrostatic discharge (ESD) can damage the equipment.
Solution: PESD devices.
PESD, which is a low capacitance (typically 0.25pF) ESD protection device, is capable of withstanding numerous ESD transients, and is a RoHS & IEC61000-4-2 compliant device having low leakage current and low clamping voltage.
Read more about the Raychem ESD protection device: PESD