SANFORD – Layoff notices for some Vishay Sprague workers have arrived earlier than expected.

Sanford’s largest employer said in late February that it would begin laying off more than 320 of its 800 workers April 23. But 30 were let go Friday, according to Paul Luce, a spokesman for the Maine Department of Labor.

Another 80 are expected to be laid off this Friday, he said, but he did not know when other workers would be laid off.