MA1.5KE39CA

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The Transient Voltage Suppressors (TVS) diodes are electronic devices that are part of the electronic industry, playing an important role in the protection of circuits from surges of overvoltage, thus increasing the reliability of the electrical systems. One such device is the MA1.5KE39CA. This TVS diode uses silicon-based technologies for highly reliable transient voltage protection.

MA1.5KE39CA Application Field

The MA1.5KE39CA is designed to protect sensitive electronic components from damage caused by excessive voltage transients. It is particularly useful in applications where the power source is remote from the circuit circuitry, such as in automotive and telecoms applications. In addition, it can be used to protect circuits against lightning strikes, power supply surges and ESD events. The MA1.5KE39CA is also tested to be compliant with IEC-61000-4-2 and ISO 10605 standards.

MA1.5KE39CA Working Principle

The MA1.5KE39CA is an unidirectional device, meaning it is designed to protect circuits from voltage surges in one direction only. It has a standoff voltage of 5.0V, meaning it will conduct current up to 5.0V and will block any voltage exceeding that value. It is formed of a junction field-effect transistor (JFET) and a Zener diode structure, which work together to ensure that its breakdown voltage does not vary much with its junction temperature. When voltage is applied to the anode of the MA1.5KE39CA, the junction will break down, allowing current to flow. Once the voltage exceeds 5.0V, the Zener diode connected to the gate of the JFET will be activated, and the device will protect the circuit by blocking any further increase in voltage. The dynamic resistance of the TVS diode is very low, meaning that when the surge current passes, the voltage drop across the device is minimal, minimizing any power losses.

Conclusion

The MA1.5KE39CA is an efficient transient voltage suppressor diode, which combines the protection of a JFET with the fast switching of a Zener diode to ensure that the breakdown voltage remains constant, even with increasing junction temperature. It is designed to protect vulnerable electronic components from damage caused by power surges, and is suitable for use in automotive, telecoms, and even some high-voltage applications.

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