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As the RF market evolves and some companies move away from RF MOSFET power transistors, STMicroelectronics has struck a balanced position by offering continued support for legacy products while also developing new products to address high performance designs and offer best-in-class performance.

If you are looking for a pin-for-pin replacement to the BLF175, BLF177 or BLF278, please see the recommendations below. Priced aggressively, the parts from STMicroelectronics provide equivalent performance at a reduced cost.

Part Number Frequency
(MHz)
CW Power
Out (W)
Supply
Voltage (V)
Gain
(dB)
Efficiency
(%)
Package
SD2918 1-200 30 50 18 50 M113
SD2931-10W 1-230 150 50 14 55 M174
SD2942W 1-250 350 50 15 55 M244
To see the full cross reference chart, click here.

For those looking for higher performance without a complete circuit redesign, the following parts represent some of the newest devices for the Broadcast, MRI, RF Plasma Generator & Laser Driver applications. The SD49xx series features 20:1 VSWR. STAC-packaged devices include characterization under pulsed conditions.

Part Number Frequency
(MHz)
CW Power
Out (W)
Supply
Voltage
(V)
Breakdown
Voltage
(V)
Gain
(dB)
Efficiency
(%)
R th J-C (°C/W) Package
SD2933W 1-155 300 50 125 20 50 0.27 M177
SD2943W 1-150 350 50 130 22 60 0.27 M177
SD3933 1-200 350 100 250 20 50 0.27 M177
SD4933 1-100 300 50 200 20 68 0.27 M177
SD4931 1-175 150 50 200 14.5 58 0.45 M174
STAC2932B 1-175 300 50 125 20 68 0.28 STAC
STAC4932B 1-175 300 50 200 20 68 0.28 STAC
STAC2942B 1-175 350 50 130 21 75 0.28 STAC


 

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