GB/T 44292-2024 Electrostatic discharge susceptibility test for bypass diode applied in photovoltaic modules

Scope

This document describes a test method and data analysis method for the electrostatic discharge (ESD) sensitivity characteristics of discrete component bypass diodes. The test method involves subjecting the bypass diodes to gradually increasing ESD stress tests, and using the two-parameter Weibull distribution function to analyze the data and infer the probability of failure. The purpose of this document is to establish a universal and reproducible experimental method to determine whether the diode's surge voltage tolerance is consistent with the ESD phenomena encountered during the manufacturing, packaging, transportation, or installation of photovoltaic modules. The focus of this document is not on emphasizing the causes of ESD in bypass diodes or establishing their pass/fail ratings. It is the user's responsibility to evaluate the ESD exposure levels of the diodes in specific usage environments. The data generated during this test can support the validation of new designs, quality control of raw materials, and/or help determine whether additional ESD control is needed during the manufacturing process. This document is not applicable to large-scale energy surge events, such as direct or indirect lightning strikes, switching of power grid capacitor banks, etc.

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