2N6428ATA

Overview

The onsemi 2N6428ATA is an NPN epitaxial silicon transistor designed for amplifier applications. It features a collector-emitter voltage of 50 V and a collector-base voltage of 60 V. The device supports a maximum collector current of 200 mA with a power dissipation rating of 625 mW at 25°C ambient temperature. Key electrical characteristics include a DC current gain ranging from 250 to 650, a collector-emitter saturation voltage of 0.2 V at low currents, and a transition frequency between 100 MHz and 700 MHz. The component utilizes a TO-92 package.

Feature Summary

• High DC current gain suitable for amplification tasks
• Low collector-emitter saturation voltage for efficient switching
• Wide bandwidth capability up to 700 MHz

Applications

• Audio-frequency amplifier circuits
• General-purpose signal amplification
• Low-noise pre-amplifier stages

Procurement Notes

Verify the manufacturer origin as Fairchild Semiconductor or onsemi depending on production date. Confirm the specific suffix 'A' indicates the noise figure variant if required by design specifications. Ensure the TO-92 package dimensions match the target PCB footprint. Check RoHS compliance status against current regulatory requirements for the intended market.

Selection Notes

Select this component when high current gain and moderate voltage ratings are required for small-signal amplification. Consider the noise figure specifications if the application involves sensitive signal processing. Evaluate the thermal management needs given the 625 mW power dissipation limit in the TO-92 package. Compare transition frequency requirements against the 100 MHz to 700 MHz range to ensure adequate performance.

Part Context

This part belongs to the 2N6428 series of NPN epitaxial silicon transistors originally manufactured by Fairchild Semiconductor. The series is characterized by its use in linear and amplifier applications requiring stable gain and low saturation voltage. The TO-92 through-hole package provides a standard form factor for prototyping and general electronic designs.

Replacement Considerations

Consult official datasheets for direct pin-compatible substitutes within the same voltage and current ratings. Verify that alternative components meet the specific noise figure and gain bandwidth product requirements of the original design.