SD2943W

Overview

The SD2943W is a gold metallized N-channel MOS field-effect RF power transistor manufactured by STMicroelectronics. Designed for 50 V DC large signal applications, it operates effectively up to 150 MHz. The device delivers a minimum output power of 350 W with 22 dB gain at 30 MHz and achieves a saturation power of 450 W. It features low RDS(on) and excellent thermal stability within a common source configuration.

Feature Summary

• Gold metallization for enhanced reliability
• Thermally enhanced packing for lower junction temperatures
• High power capability with superior saturation performance

Applications

• Industrial, Scientific, and Medical (ISM) applications
• HF/VHF/UHF RF power amplification
• Large signal 50 V DC operations

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and marking specifications. Confirm RoHS compliance status through current datasheets or ECOPACK declarations. Ensure compatibility with existing thermal management designs due to the thermally enhanced packing requirements.

Selection Notes

Select this component for high-power RF applications requiring ruggedness and reliability. Compare saturation power levels against previous series models like the SD2933 to evaluate performance gains. Consider the operating frequency range up to 150 MHz when designing matching networks.

Part Context

The SD2943W belongs to the SD2943 series of HF/VHF/UHF RF power N-channel MOSFETs. It represents an evolution in STMicroelectronics' DMOS technology, offering improved power saturation compared to earlier generations while maintaining robust thermal characteristics for demanding environments.

Replacement Considerations

The SD2933 is referenced as a predecessor with lower saturation power. Verify mechanical and electrical compatibility if substituting from older series components.