У вашего броузера проблема в совместимости с HTML5
This is one of the most misleading parameters because there is no industry
standard for how they are derived.
For more information, read the blog "Understanding MOSFET datasheets Part 3-
Continuous current ratings [1]"
[1] http://e2e.ti.com/blogs_/b/powerhouse/archive/2015/05/25/understanding-mosfet-data-sheets-part-3