MSL（Moisture Sensitivity Level）标准是电子行业用来评估元件对湿气敏感程度的一套分类体系，它将元件根据其对湿气的敏感性分为8个不同的等级。 这些等级反映了元件在特定温湿度条件下可以安全存放的时间，而不会…

湿气敏感性等级(Moisture Sensitivity Level，MSL) 被用来定义 IC 在吸湿及保存期限的等级，若IC超过保存期限，则无法保证不会因吸收太多湿气而在SMT回 流焊时发生 POPCORN现象。

Moisture sensitivity level (MSL) is a rating that shows a device's susceptibility to damage due to absorbed moisture when subjected to reflow soldering as defined in J-STD-020. It relates to the packaging and handling precautions for some semiconductors.

Moisture sensitivity level (MSL) is a rating established by JEDEC for electronic components that indicates the floor life of the component and provides the maximum allowable exposure for electronic components in humid environments. I’ve considered all 8 MSL classifications and explained them in detail in this article.

潮湿敏感等级（英語：Moisture sensitivity level，縮寫 MSL），與某些半导体器件的封装和操作规范相关。MSL是针对潮湿敏感设备能够暴露在室内环境的时长标准（第1级为30 °C/85%RH；其余等级为30 °C/60%RH）。

2023年2月18日 · 湿度敏感等级（Moisture Sensitive Level, MSL）反映了器件在暴露于一定湿度条件下的最大允许暴露时间。例如，MSL3等级的器件在30℃和60%RH环境下，允许暴露时间为三天。 标识方面，MSD通常带有湿度敏感级别符号和...

2025年1月20日 · Moisture Sensitivity Level (MSL) represents the sensitivity of semiconductor components to moisture during storage and use. The higher the MSL value, the more sensitive the component is to moisture. According to the IPC/JEDEC standard J-STD-020, components are divided into different moisture sensitivity levels, which determine the treatment of ...

『湿度敏感等级』MSL (Moisture Sentivity levels)，由小排到大，数字越小的表示其抗湿度能力越好；数字越大的，表示其可以曝露于环境湿气的时间要越短。 以等级3 (level 3)来举例说明，如果零件暴露在摄氏温度30°C与60％湿度以内的环境下，那么其存放时间就不可以超过192小时 (其中需扣除IC半导体厂商的24小时的曝露时间，所以SMT表面贴着厂就只剩下168小时 (=192-24)的车间时间了)，也就是说对于等级3的IC从真空包装中取出后，就必须在168个小时内打件并过 …

Level in the following table indicates the moisture sensitivity level, the level is from 1 to 6, and in principle level 1 (MSL 1) indicates that the parts have the lowest moisture requirements, that is, the less susceptible to moisture.

In recognition of the varying degrees of popcorn cracking tendency of various package types, IPC/JEDEC defined a standard classification of moisture sensitivity levels (MSL's). The MSL's are expressed in numbers, with the MSL number increasing with the vulnerability of the package to popcorn cracking.