BLF2425M8LS140U

Overview

The BLF2425M8LS140U is a power LDMOS transistor designed for Industrial, Scientific and Medical (ISM) applications in the 2400 MHz to 2500 MHz frequency range. It delivers 140 W of continuous wave output power with a typical drain efficiency of 56% and power gain of 19 dB at VDS = 28 V. The device features a maximum drain-source voltage of 65 V, a junction temperature rating up to 225 °C, and an on-state resistance of 69 mΩ. It utilizes an internally matched SOT502B earless flanged ceramic package.

Feature Summary

• Internally matched design for simplified circuit integration
• High ruggedness capable of withstanding VSWR = 10:1 through all phases
• Integrated ElectroStatic Discharge (ESD) protection
• Excellent thermal stability and high efficiency

Applications

• Industrial, scientific and medical applications in the 2400 MHz to 2500 MHz range

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm the exact package variant. The 'S' designation indicates the earless flanged ceramic package (SOT502B), while other suffixes may denote different mechanical configurations. Ensure compliance with RoHS directives as specified in the product data sheet before finalizing procurement specifications.

Selection Notes

Select this component for high-power CW applications requiring broadband operation between 2400 MHz and 2500 MHz. The internal matching network reduces external component count. Verify that the application can accommodate the required VDS of 28 V and IDq of 1300 mA for optimal performance. Ensure the PCB layout supports the thermal requirements given the 0.28 K/W junction-to-case thermal resistance.

Part Context

This part belongs to the Ampleon BLF2425M8L series of power LDMOS transistors. The BLF2425M8LS140U is the earless version (SOT502B), distinct from the flanged version with mounting holes (BLF2425M8L140, SOT502A). Both variants share identical electrical characteristics but differ in mechanical mounting options.

Replacement Considerations

The BLF2425M8L140 is the electrically equivalent alternative featuring the SOT502A flanged package with two mounting holes. Substitution requires verification of mechanical fit within the housing or heatsink assembly.