2SC5646A-TL-H

Overview

The onsemi 2SC5646A-TL-H is a discontinued NPN single RF bipolar transistor designed for UHF to S-Band applications. It features a transition frequency (fT) of 12.5 GHz and operates with a maximum collector-emitter voltage (VCEO) of 4 V. The device supports a DC collector current of 30 mA and dissipates up to 100 mW of power. It utilizes a 3-pin SSFP surface-mount package, offering high gain characteristics suitable for low-noise amplifier and oscillator circuits in radio frequency systems.

Feature Summary

• Optimized for low-noise amplification and oscillation in UHF to S-Band frequencies
• High transition frequency capability supporting operation up to 12.5 GHz
• Compact 3-pin SSFP surface-mount packaging for efficient board integration

Applications

• UHF to S-Band Low-Noise Amplifiers
• RF Oscillator Circuits
• Radio Frequency Signal Processing Modules

Procurement Notes

This component is officially marked as discontinued by onsemi and is not recommended for new designs. Verification of availability should focus on surplus or secondary market sources rather than direct manufacturer distribution. Engineers must confirm the specific lot date code and physical condition when sourcing from third-party distributors, as standard supply chain channels no longer support this part number for production use.

Selection Notes

Designers requiring active procurement options should evaluate alternative NPN RF transistors within the same family that maintain similar fT specifications and SSFP packaging constraints. Selection criteria must prioritize compatibility with existing circuit impedance matching networks and thermal dissipation requirements. Consulting the manufacturer's representative is advised to identify current generation replacements that ensure long-term supply stability for ongoing projects.

Part Context

The 2SC5646A-TL-H belongs to the broader category of RF Bipolar Transistors manufactured by onsemi. It is specifically engineered for high-frequency performance, distinguishing itself through its 12.5 GHz transition frequency and low-voltage operation profile. This component represents a legacy solution for UHF and S-Band applications, previously utilized in communication equipment before being superseded by newer product lines.

Replacement Considerations

The datasheet explicitly states the device is discontinued and not recommended for new designs. No public substitute part numbers are provided in the official documentation; engineers must contact onsemi representatives directly for information regarding equivalent components.