By Fanny Liu 

TAIPEI--Output from Taiwan's factories, utilities and mines rose to a record high in May, as demand for semiconductors and other electronic components continued to rise.

The industrial output index--which counts only domestic production--rose 5.19% year-over-year in May to 109.56, the Ministry of Economic Affairs said Monday. It beat economists' median forecast for a 2.26% increase, as U.S. businesses replenished inventories more aggressively than some of them had expected. The index gained 5.29% in April.

Although growth of exports and overseas orders in May have disappointed many economists, in part because Taiwan has been bleeding market share in television panels and smartphones, the latest domestic factory data suggest that global demand is still holding up well and overall exports could grow more quickly going forward.

"The solid [industrial production] print for May provides further evidence that Taiwan is well-placed to benefit from the recovery in external demand, particularly from [the U.S., Europe and Japan], and we look for this to be reflected in stronger exports over the next few months," Barclays economist Waiho Leong wrote.

Taiwan is one of the world's biggest suppliers of electronic products and components. The island's output is often used to gauge the health of the global economy.

Semiconductor output rose 11.88%, quickening from 8.09% growth in April. Taiwan Semiconductor Manufacturing Co., the world's biggest contract chip maker by revenue, produces advanced microprocessors exclusively in Taiwan, contributing around 10% to the index.

Although global smartphone and tablet sales have already passed the stage of explosive growth, orders placed with TSMC's advanced facilities continue to rise. TSMC, whose latest 20-nanometer facility is supplying Apple Inc. with a chip called A8, has forecast strong demand for smaller and more powerful microprocessors for the rest of this year.

Personal computer and smartphone production, however, rose only 0.7% last month.

Television panels and related components production, however, dropped 3.90%--worse than a 2.58% decline in April.

Taiwan's screens have been losing market share to South Korean and Chinese rivals, which have invested heavily in advanced and lower-cost technology for years. TV, computer and smartphone makers in China have also increasingly relied on locally produced panels, and have placed fewer orders with Taiwanese manufacturers.

As Taiwan also produces panels in factories across China, the chronic decline in panel sales has weighed more on export orders, which also count production outside Taiwan, than domestic factory output.

Yuanta Investment Consulting economist Aidan Wang said U.S. businesses will refill their stocks likely at a slower pace over the next couple of months, after months of aggressively building of their inventories as they recover from harsh weather earlier this year.

But Mr. Wang said he expects output "will grow strongly again toward the end of the third quarter, as long as the U.S. economy grows solidly and many electronic brands launch new gadgets for the holiday as expected."

Write to Fanny Liu at fanny.liu@wsj.com

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