1.5KE62CA Circuit Protection

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TVS-Diodes, namely Transient Voltage Suppression Diodes, are designed to shield electronic components and wires from surge and electrical overstress. In the circuit, TVS-Diodes play an important role in eliminating damage caused by lightning strikes, power surges or transients during operations, effectively protecting the circuit from damage when a surge occurs. The 1.5KE62CA is a unidirectional TVS-Diode that consists of two terminals, the cathode and anode, with a size of 2.5mm by 2.6mm. Its reverse stand-off voltage (VST) is 66V, clamping voltage (V C ) is 93V, peak pulse power Pp is 780W, and the junction to lead thermal resistance θJL is 81°C/W.

Under normal conditions, the TVS-Diode appears like an open-circuit and shows no voltage drop. However, when the surge voltage exceeds the peak stand-off voltage, the TVS-Diode starts conducting and will clamp the voltage, effectively blocking the over-voltage and avoiding overstress of the circuit. As long as the current does not exceed the peak current that the diode can hold, the circuit will still be functional. Overall, this device allows for fast turn-on time, it is low leakage, it contains nickel-plated copper foot pads, and it is RoHS compliant.

Due to protection afforded by the 1.5KE62CA, it is widely used in a variety of applications such as automotive, data-storage, telecommunications, computer peripheral, navigation, security and medical equipment. Specifically, it is used for rail-to-rail, motor control, and line card protection. In addition, the device is seen as an improvement over the former KE60A device, as the 1.5KE62CA offers better reverse stand-off, clamping voltage, peak pulse power, and thermal resistance.

In addition to protection, the 1.5KE62CA also assists the flow of current like in the case of cellular phones where it can help provide uninterrupted powering. In these cases, TVS-Diodes are utilized to mechanically block ESD, which occurs when an electrical discharge occurs to the pins of an electronic device. Without the diode, the current will rapidly transition from off to on and damage the transistor; however, the presence of the TVS-Diode allows for a gradual buildup of current, minimizing damage to the terminal.

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