With demand strong for its semiconductors, Vishay Intertechnology Inc. today boosted its forecast for fourth-quarter revenue by about 9 percent

The Malvern company said it now sees revenue for the quarter of $580 million to $600 million. It previous forecast, issued late in October, was for a range of $530 millionto $570 million.

In last year's fourth quarter, the company posted revenue of $575 million.

Vishay said its production capacity is still constrained.

In addition to semiconductors, Vishay makes electronic components. Its products are used in the industrial, computing, automotive, telecommunications and other markets.