ROHM’s New High Anti-Surge Chip Resistors SDR01 Series Achieve 0.33W Rated Power in the 0402 Size

Willich-Münchheide, Germany, September 10, 2026 – ROHM has developed the “SDR01 Series” of high anti-surge chip resistors, delivering a class-leading* rated power of 0.33W in the 0402 (1005 Metric) size. Designed for electronic equipment where mounting densities continue to increase, the series is well suited for automotive, industrial, consumer electronics, and AI server applications. The new products help save board space and reduce component count by enabling replacement of larger-size resistors and consolidation of resistors while maintaining the reliability required of anti-surge chip resistors. As electronic equipment becomes more highly functional and requires higher power, demand is rising across automotive, industrial, and consumer markets for electronic components that combine compact size with high power handling. These trends are also increasing the need for smaller high-reliability chip resistors, including anti-surge products. In power supply circuits and around interfaces, resistance to surges and electrostatic discharge (ESD), as well as high-power capability, is required. To address these needs, ROHM optimized the resistive element and electrode designs of the SDR01 Series. This enables high rated power to be guaranteed in the 0402 size while securing the reliability expected of high anti-surge chip resistors. The new products guarantee 0.33W up to the rated terminal temperature of Tk=125°C. This makes them easier to use in demanding thermal environments, such as high-density mounting and areas around heat-generating components, helping reduce the thermal design burden. In addition, these products achieve a TCR of ±100ppm/°C for 10Ω ≤ R ≤ 2.2MΩ. By suppressing resistance-value fluctuations caused by temperature changes, the products support stable circuit operation and contribute to smaller, more reliable power supply circuits and peripheral interface circuits. Mass production of the new products has already begun. Online sales have also started, with the products available for purchase through the ROHM Online Store as well as online distributors such as DigiKey and Farnell. ROHM will continue to expand its lineup of high-reliability chip resistors, contributing to greater miniaturization, higher power handling, and higher reliability in electronic equipment. Application Examples Power supply and control circuits in automotive, industrial, and consumer electronics requiring compact size, high power handling, and high reliability. *ROHM September 10, 2026 study

About ROHM Semiconductor ROHM, a leading semiconductor and electronic component manufacturer, was established in 1958. From the automotive and industrial equipment markets to the consumer and communication sectors, ROHM supplies ICs, discretes, and electronic components featuring superior quality and reliability through a global sales and development network. ROHM’s strengths in the analog and power markets allow us to propose optimized solutions for entire systems that combine peripheral components (i.e. transistors, diodes, resistors) with the latest SiC power devices as well as drive ICs that maximize their performance. Please visit ROHM’s website for more information: https://www.rohm.com