SD2931-12MR

Overview

The SD2931-12MR is a gold-metallized N-channel MOS field-effect RF power transistor from STMicroelectronics. It is electrically identical to the standard SD2931 MOSFET and designed for 50 V DC large-signal applications up to 230 MHz. The device delivers a minimum output power of 150 W with 14 dB gain at 175 MHz. Mechanically compatible with the SD2931, it features a moisture-resistant package specifically engineered for extreme environments, offering superior ruggedness against cyclic high moisture operation and severe storage conditions.

Feature Summary

• Gold metallization provides excellent thermal stability
• Moisture-resistant packaging ensures reliability in extreme environments
• Thermally enhanced packing reduces junction temperatures
• Mechanically compatible with standard SD2931 series

Applications

• Industrial, Scientific, and Medical (ISM) applications requiring high reliability
• Large signal RF amplification up to 230 MHz
• Common source push-pull configurations
• Operations in high humidity or cyclic moisture environments

Procurement Notes

Verify the specific suffix '12MR' to confirm the inclusion of the moisture-resistant package and gold metallization, as these distinguish it from the standard SD2931-10W. Ensure the application environment matches the component's design for high humidity and severe storage conditions. Confirm mechanical compatibility requirements if replacing existing SD2931 designs.

Selection Notes

Select this component when standard SD2931 performance is required but environmental durability is critical. The lower thermal resistance compared to the standard version supports higher reliability in ISM bands. Verify that the 50 V DC supply constraint aligns with the system design before implementation.

Part Context

This part belongs to the SD2931 series of HF/VHF DMOS transistors. While electrically equivalent to the standard SD2931, the -12MR variant is distinguished by its specialized packaging for moisture resistance. It represents an upgraded ruggedness option within the same electrical family, targeting applications where standard packages might fail due to environmental stress.

Replacement Considerations

The SD2931-10W is electrically identical but lacks the moisture-resistant packaging. Substitution requires verifying if the environmental protection is necessary for the specific deployment scenario.