BLF2425M9LS140J

Overview

The BLF2425M9LS140J is a power LDMOS transistor designed for Industrial, Scientific and Medical (ISM) applications operating between 2400 MHz and 2500 MHz. It delivers 140 W of continuous wave output power at 28 V drain-source voltage with a typical drain efficiency of 60% and power gain of 20 dB. The device features an integrated ESD protection circuit and is internally matched for broadband operation. It utilizes an earless flanged ceramic package (SOT502B) with a junction-to-case thermal resistance of 0.23 K/W and supports a maximum junction temperature of 225 °C.

Feature Summary

• High efficiency and high power gain in the 2400 MHz to 2500 MHz frequency range
• Excellent ruggedness capable of withstanding a VSWR of 10:1 through all phases
• Integrated electrostatic discharge (ESD) protection
• Internally matched design for simplified circuit implementation

Applications

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

Procurement Notes

Verify the specific ordering suffix 'J' against the official Ampleon datasheet, as the primary document lists the base part number without this suffix. Confirm that the component meets RoHS Directive 2002/95/EC requirements. Ensure handling procedures strictly follow ESD precautions due to the sensitivity of the internal protection circuitry and the LDMOS technology used in the device construction.

Selection Notes

Select this component for high-power CW applications requiring robust performance in ISM bands. The internal matching network simplifies impedance matching compared to non-matched variants. Evaluate the thermal management capabilities to maintain the case temperature within limits, ensuring the junction temperature does not exceed 225 °C during continuous operation at full rated power output.

Part Context

This device belongs to the BLF2425M9LS series of power LDMOS transistors from Ampleon. These components are engineered specifically for broadband RF power amplification in the 2.4 GHz range. The SOT502B ceramic package provides superior thermal dissipation characteristics necessary for maintaining reliability under high-power continuous wave conditions common in industrial equipment.

Replacement Considerations

The BLF2425M9LS140 serves as a direct functional replacement for previous generations of non-matched or lower-power devices in the same frequency band. Verify pinout compatibility when substituting into existing designs, particularly regarding the flange connection which acts as the drain terminal.