BLF978PU

Overview

The BLF978PU is a 1200 W LDMOS power transistor designed for broadcast and industrial applications in the HF to 700 MHz band. It features a balanced SOT539A ceramic package with two mounting holes and four leads. Key electrical parameters include a drain-source voltage of 108 V, a junction temperature rating up to 225 °C, and a thermal resistance from junction to case of 0.121 K/W at Tcase = 90 °C. The device delivers high efficiency, achieving typical drain efficiency values of 80.6% at 225 MHz with 1200 W output power.

Feature Summary

• Integrated ESD protection for enhanced handling safety
• Excellent ruggedness capable of withstanding high VSWR mismatches
• High efficiency operation suitable for broadband applications
• Easy power control characteristics

Applications

• Industrial, scientific and medical (ISM) applications
• Broadcast transmitter applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to ensure correct packaging and variant selection. Confirm RoHS compliance status via official Ampleon product details pages prior to procurement. Ensure that the requested part number matches the exact technical specifications required for the design application.

Selection Notes

Select this component for designs requiring high power output in the HF/VHF spectrum. Verify thermal management capabilities given the 225 °C junction temperature limit. Ensure the circuit design supports the specified impedance matching requirements for optimal performance in class-AB operation.

Part Context

The BLF978P belongs to Ampleon's portfolio of HF/VHF power LDMOS transistors. It is specifically engineered for robust performance in demanding broadcast and industrial environments. The device utilizes a flanged balanced ceramic package to facilitate effective heat dissipation and mechanical stability in high-power amplifier modules.

Replacement Considerations

Consult the official Ampleon replacement guide or datasheet for verified substitute part numbers. Do not assume cross-compatibility with other series without verifying pinout, thermal, and electrical specifications.