BLF245B,112

Overview

The BLF245B is a VHF push-pull power MOS transistor manufactured by Ampleon. It is a dual silicon N-channel enhancement mode vertical D-MOS device designed for large signal amplifier applications in the VHF frequency range. The transistor is encapsulated in a 4-lead, SOT279A balanced flange package with a ceramic cap and features gold metallization for excellent reliability. In Class-B operation at 175 MHz with a drain-source voltage of 28 V, it delivers an output power of 30 W, a power gain exceeding 14 dB, and a drain efficiency greater than 55%.

Feature Summary

• Dual push-pull configuration with common source connection via mounting flange.
• Gold metallization ensures excellent reliability.
• Good thermal stability for robust performance.
• Capable of withstanding load mismatch corresponding to VSWR = 50 through all phases.

Applications

• VHF frequency range large signal amplifier applications.
• Push-pull common source test circuits.

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm exact specifications. Ensure compliance with safety precautions regarding beryllium oxide content during handling and disposal. Confirm current product status and availability directly with authorized distributors or the manufacturer before initiating procurement processes.

Selection Notes

Select this component for VHF applications requiring high power gain and easy power control. Consider the SOT279A package dimensions and thermal resistance characteristics when designing heatsinking solutions. Verify gate-source threshold voltage group requirements for precise biasing in Class-B operation.

Part Context

The BLF245B is part of Ampleon's portfolio of RF power transistors. Originally developed under Philips Semiconductors, the brand transitioned to Ampleon in December 2015. This device represents a specialized solution for VHF band amplification, leveraging vertical D-MOS technology for high efficiency and ruggedness in demanding radio frequency environments.

Replacement Considerations

No verified public substitute part numbers are available in the provided documentation.