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

ROHM has introduced the SDR01 Series of high anti-surge chip resistors, achieving a class-leading rated power of 0.33W within the compact 0402 (1005 Metric) size. This series is engineered for modern electronic equipment where increasing mounting density is a critical design consideration. It suits a broad range of applications, including automotive systems, industrial equipment, consumer electronics, and AI servers. By enabling the replacement of larger resistors and the consolidation of multiple components, the SDR01 Series helps save valuable board space and reduce overall component count while maintaining the high reliability essential for anti-surge chip resistors.

The development of the SDR01 Series directly addresses the growing market demand for electronic components that combine a compact footprint with robust power handling capabilities. As electronic devices become more highly functional and require increased power, there is a corresponding need for smaller, high-reliability chip resistors, particularly those with anti-surge properties. In critical areas such as power supply circuits and around interfaces, components must offer strong resistance to surges and electrostatic discharge (ESD), alongside high-power capability.

To meet these stringent requirements, ROHM meticulously optimized both the resistive element and electrode designs of the SDR01 Series. This innovative approach allows the series to guarantee a high rated power in the 0402 size while simultaneously ensuring the expected reliability of high anti-surge chip resistors. The products are guaranteed to deliver 0.33W up to a rated terminal temperature of Tk=125°C, making them highly effective in demanding thermal environments, such as high-density mounting areas and regions adjacent to heat-generating components. This capability significantly reduces the thermal design burden for engineers.

Furthermore, the SDR01 Series achieves a Temperature Coefficient of Resistance (TCR) of ±100ppm/°C across a resistance range from 10Ω to 2.2MΩ. This precise TCR characteristic effectively suppresses resistance-value fluctuations caused by temperature changes, thereby supporting stable circuit operation. This contributes to the development of smaller, more reliable power supply circuits and peripheral interface circuits. Mass production of the SDR01 Series has already commenced, with samples available at $0.04/unit (excluding tax), and online sales are accessible through the ROHM Online Store and authorised distributors like DigiKey and Farnell.

Specifications

Key Features

• The SDR01 Series is a high anti-surge chip resistor series developed by ROHM.
• It achieves a class-leading rated power of 0.33W in the 0402 (1005 Metric) size.
• ROHM optimised the resistive element and electrode designs to enable high rated power in the 0402 size.
• The products guarantee 0.33W up to the rated terminal temperature of Tk=125°C.
• They are intended for demanding thermal environments, including high-density mounting and areas around heat-generating components.
• The series achieves a TCR of ±100ppm/°C for resistance values from 10Ω to 2.2MΩ.
• This TCR characteristic suppresses resistance-value fluctuations caused by temperature changes.
• The products support stable circuit operation and contribute to smaller, more reliable circuits.
• They help reduce the thermal design burden in demanding thermal environments.
• The SDR01 Series can save board space and reduce component count by replacing larger-size resistors and consolidating resistors.
• Mass production has already begun, and online sales are available through ROHM's online store and distributors.

Applications

• Automotive electronic equipment
• Industrial electronic equipment
• Consumer electronics
• AI servers
• Power supply circuits requiring compact size, high power handling, and high reliability
• Peripheral interface circuits requiring compact size, high power handling, and high reliability

Avaliability

The new ROHM high anti-surge chip resistors are available for 0402 (1005 metric) size applications, providing a high level of surge resistance and reliability for space-constrained designs.