How to select bidirectional ESD diode?

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How to select bidirectional ESD diode? [Copy link]

ESD electrostatic diodes are very common in circuit applications. The parameters that should be paid attention to when selecting electrostatic diodes are: working voltage, breakdown voltage, clamping voltage, junction capacitance, leakage current, peak pulse current, peak pulse power, etc. Regarding the selection of ESD diodes, this is a classic topic that will never go out of date. The selection tips of ESD diodes are as follows:
1. The working voltage of the ESD tube should be greater than the highest working voltage in the circuit;
2. The selection of IPP and VC is to select the model of IPP according to the maximum surge current that may appear on the line. It should be noted that the VC at this time should be less than the maximum peak voltage that the protected chip can withstand;
3. When used for signal transmission circuit protection, pay attention to the frequency or transmission rate of the transmitted signal. When the signal frequency or transmission rate is high, a low junction capacitance series ESD tube should be selected;
4. Select a suitable package according to the circuit design layout and the number of protected lines. The size of the ESD electrostatic diode package can reflect the protection level of the device to a certain extent. Generally, the larger the package, the larger the ESD chip area that can be accommodated, and the higher the protection level, and vice versa.

ESD datasheet download: ESD5B5CU SOD-523 200407.pdf (1.34 MB, downloads: 2)

2023-8-28 09:49 上传

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wang12011201

Choose the appropriate package according to the circuit design layout and the number of protected lines. The size of the ESD electrostatic diode package can reflect the protection level of the device to a certain extent. Generally, the larger the package, the larger the ESD chip area that can be accommodated, and the higher the protection level, and vice versa.

lkh747566933

There should be no difference in performance between this bidirectional ESD diode and the unidirectional ESD diode!