SD2931-10W

Overview

The SD2931-10W is a gold-metallized N-channel enhancement-mode RF power MOSFET from STMicroelectronics, designed for large-signal applications up to 230 MHz. It operates with a drain-source voltage of 125 V and supports a continuous drain current of 20 A. The device delivers a minimum output power of 150 W with a typical power gain of 14 dB at 175 MHz. Packaged in the M174 surface-mount format with four pins, it features thermally enhanced construction that reduces thermal resistance by 25% compared to standard variants. This design ensures excellent thermal stability and lower junction temperatures, making it suitable for demanding industrial, scientific, and medical (ISM) environments.

Feature Summary

• Gold metallization provides superior corrosion resistance and electrical contact reliability.
• Thermally enhanced packaging significantly lowers thermal resistance for improved heat dissipation.
• Common source configuration enables straightforward integration into RF amplifier circuits.

Applications

• Industrial, Scientific, and Medical (ISM) equipment requiring high reliability
• HF/VHF/UHF RF power amplification stages
• Large-signal linear and switching applications

Procurement Notes

Verify the specific suffix against official STMicroelectronics documentation to confirm mechanical and electrical equivalence. Ensure the procurement channel provides traceable component history. Confirm RoHS compliance status through the manufacturer's latest release notes. Validate package dimensions against IPC standards before assembly. Request batch-specific test reports if required for critical ISM applications.

Selection Notes

Select this component when operating frequencies extend up to 230 MHz and ruggedness is prioritized over cost. The gold-metallized construction offers better environmental stability than standard aluminum-metallized alternatives. Consider the M174 footprint constraints during PCB layout. Evaluate thermal management requirements given the 150 W output capability. Compare thermal resistance values against standard SD2931 models to justify the performance upgrade.

Part Context

The SD2931-10W belongs to the SD2931 series of HF/VHF DMOS transistors. It shares electrical characteristics with the standard SD2931 but incorporates mechanical and thermal improvements. The series targets robust performance in harsh environments where moisture resistance and thermal cycling durability are essential. It serves as an upgraded variant within STMicroelectronics' RF power transistor portfolio.

Replacement Considerations

The standard SD2931 is electrically identical but lacks the enhanced thermal capabilities and gold metallization. Verify pinout compatibility before substitution. Ensure the replacement part meets the same ISM reliability standards. Check for any updates in the datasheet regarding maximum ratings or thermal limits.