2N5739

Overview

The 2N5739 is a silicon NPN power bipolar junction transistor (BJT) manufactured by Microchip Technology. It is designed for high-power switching and amplification applications, featuring a collector-emitter voltage rating of 400V and a continuous collector current capacity of 1A. The device operates with a maximum power dissipation of 8W at case temperature and supports a DC current gain range typically between 20 and 70. It utilizes a TO-205AA metal can package suitable for through-hole mounting in industrial and commercial circuits requiring robust voltage handling.

Feature Summary

• High voltage blocking capability for demanding power environments
• Robust thermal performance via metal can construction
• Suitable for linear and saturated switching operations

Applications

• High-voltage switching regulators
• Industrial motor control interfaces
• Power amplifier output stages

Procurement Notes

Verify the specific suffix code on the component marking to ensure compatibility with required pin configurations and thermal specifications. Confirm that the procurement channel provides original manufacturer documentation or traceability records. Check for any recent product change notifications regarding lead times or material composition updates before finalizing orders.

Selection Notes

Select this component when circuit designs require an NPN transistor capable of handling 400V collector voltages with moderate current levels. Ensure the thermal management strategy accounts for the 8W dissipation limit under worst-case operating conditions. Compare against alternative high-voltage BJTs if lower saturation voltage or higher frequency response is required for the specific application topology.

Part Context

This part belongs to the legacy discrete semiconductor portfolio maintained by Microchip Technology. It serves as a replacement for older industry-standard high-voltage transistors used in vintage equipment repair and modern industrial upgrades. The TO-205AA package remains a standard form factor for high-reliability through-hole power applications.

Replacement Considerations

Direct replacements include equivalent NPN power transistors with matching 400V ratings and similar current capabilities, such as the 2N3055 series variants or other TO-205AA packaged devices from qualified manufacturers. Verify pinout compatibility and thermal resistance values before substitution.