Sunon: A 45-Year-Old Fan Maker Adapts to the AI Cooling Era

When the AI server industry began standardizing on liquid cooling in 2025, Sunonwealth Electric Machine Industry, the Kaohsiung-based fan and motor specialist better known as Sunon, looked like the cooling supply chain's most exposed name. A year later, that reading has aged badly. Founded in 1980 and listed on the Taiwan Stock Exchange under ticker 2421, Sunon has used its fan and motor heritage as a launchpad rather than a millstone, building out a credible liquid-cooling portfolio while its legacy business continues to grow.

The company built its reputation supplying DC, AC, and EC fans, blowers, and cooling modules for everything from PCs and consumer appliances to telecom base stations and industrial systems. For most of its history that fan and motor heritage was a strength, but as hyperscalers standardized on direct-to-chip cold plates and GPU thermal design power raced past the kilowatt mark, high-volume fan demand briefly looked at risk of stalling. Sunon's response has been to invest aggressively in liquid cooling rather than retreat behind its traditional product mix.

The numbers suggest the pivot is beginning to land with March 2026 revenue reaching around US$60 million, 27% year over year, and cumulative year-to-date sales 19.5% higher than the same period a year earlier. That places Sunon firmly inside the five-company group of Taiwan cooling specialists, alongside Asia Vital Components (AVC), Auras, Jentech, and Kaori Heat Treatment, whose monthly revenues have been setting records as the AI server build-out accelerates.

Sunon's strategy is best understood as a defense of existing turf paired with a controlled expansion into adjacent territory. On the air-cooling side, the company has argued that hybrid air-to-liquid architectures will remain mainstream for several years before pure liquid-to-liquid systems take over, and that AI workloads are also driving higher fan specifications and higher unit counts per rack. In 2025 that case was validated when Sunon was named a recommended supplier for Nvidia's GB200 and GB300 platforms, a designation that should support shipment momentum well into 2026.

On the liquid-cooling side, Sunon has built out the infrastructure needed to compete with dedicated module specialists. Its R&D center in New Taipei and its Huizhou facility in China were completed in late 2025, and pilot production of liquid cold plates was followed by full-scale mass production in the first quarter of 2026. Coolant Distribution Unit (CDU) shipments are expected to begin in the first half of 2026 once safety certifications are in place. Sunon has indicated that early CDU customers will be Tier 2 and non-mainstream GPU and ASIC server makers, a deliberate choice that lets the company refine its products and ramp volumes without going head-to-head with entrenched suppliers from day one. Management has also been explicit that Sunon intends to be more than a niche participant in liquid cooling, framing the segment as a long-term growth engine rather than a defensive hedge.

These moves give Sunon a position straddling two cooling eras at once. Its core fan and motor business continues to benefit from rising AI server volumes, while its emerging liquid cooling portfolio offers the longer-term growth angle. For a 1980-vintage Kaohsiung motor maker that briefly looked like collateral damage of the liquid-cooling transition, that is a rather elegant outcome.