The announcement and the expansion figures
Mitsubishi Materials (MMC) announced on October 23, according to a report by IT之家, a plan to significantly increase production capacity at its Thai site in Samut Prakan, dedicated to chip thermistors for optical communication applications. The stated goal is to reach 12 million units per month by November 2027, a level six times that recorded in 2025. This is therefore a multi-year effort, with an explicit time horizon and a defined benchmark.
Why the component matters
MMC’s chip thermistor is described as a device capable of monitoring temperature with dimensions of less than one millimeter, combining precision and reliability. Its function is anything but ancillary: the performance of optical transceivers is affected by thermal variations, and accurate temperature control contributes to stable communication quality. According to the source, the component is already widely adopted by leading manufacturers and facilitates the miniaturization and performance improvement of transceivers.
The significance of the announcement lies in the link between a small component and a much broader supply chain. Demand for thermistors does not arise from a standalone market, but from upstream growth in optical transceivers, which in turn depend on increasing traffic in data centers.
The push from artificial intelligence and the limits to be verified
The source links the expansion to the spread of artificial intelligence, which is rapidly increasing the volume of data processed in data centers. This generates higher demand for high-speed optical interfaces, which translates into higher shipments of transceivers and, consequently, pressure on thermistor demand. MMC says the expansion will enable it to meet this growing demand, ensure stable supplies to existing customers, and win new customers and projects.
Some elements remain to be clarified. The material does not indicate the investment amount, the number of additional production lines, or the customers involved; the reference to “leading manufacturers” remains generic. It is also not specified whether the additional capacity will be entirely dedicated to optical communication or whether it can be repurposed. The figure of 12 million units per month is a target stated by the company, not a result already achieved, and its realization will depend on the actual trend in transceiver demand over the next two years.
