BLF278

Overview

The BLF278 is a dual push-pull silicon N-channel enhancement mode vertical D-MOS transistor manufactured by NXP Semiconductors and distributed by Rochester Electronics. It is encapsulated in a 4-lead SOT262A1 balanced flange package with two ceramic caps, where the mounting flange serves as the common source connection. Designed for VHF frequency ranges, this component offers high power gain, easy power control, and good thermal stability. Gold metallization ensures excellent reliability for broadcast transmitter applications.

Feature Summary

• Dual push-pull configuration with common source connection via mounting flange
• Gold metallization for enhanced reliability
• Good thermal stability characteristics

Applications

• VHF broadcast transmitters

Procurement Notes

Verify authenticity through authorized distributors or certified suppliers like Rochester Electronics. Check datasheet revisions for specific electrical parameters. Confirm package integrity and pinout compatibility before integration. Ensure storage conditions meet semiconductor standards to prevent degradation.

Selection Notes

Select based on VHF frequency requirements and push-pull topology needs. Consider thermal management solutions due to power dissipation. Verify package dimensions against PCB layout constraints. Compare gain and stability metrics with alternative VHF MOSFETs for optimal circuit performance.

Part Context

Part of NXP's VHF power transistor family, including BLF245B, BLF248, BLF368, and BLF378. These components share similar push-pull architectures for broadcast applications. The BLF278 specifically targets VHF range operations with robust thermal and electrical characteristics.

Replacement Considerations

Direct substitutes include BLF245B, BLF248, BLF368, and BLF378 from NXP. Verify pinout and thermal resistance compatibility when replacing. Ensure voltage and current ratings match original design specifications.