BEIJING — Foxconn Technology, one of the biggest manufacturers of products for Apple, Dell, Hewlett-Packard and other electronics companies, said Saturday that it would sharply raise worker salaries at its Chinese factories.

Foxconn said that salaries for many workers would immediately jump by 16 to 25 percent, to about $400 a month, before overtime.

The company also said it would reduce overtime hours at its factories.

Labor rights groups say that over the years, many Foxconn plants have violated Chinese labor laws by pushing workers to endure excessive amounts of overtime.

Criticism has grown over working conditions at several Apple suppliers in China, including Foxconn, which employs more than one million workers to assemble some of the world’s most popular devices.