ZDT651TC

Overview

The ZDT651TC is a dual NPN medium power transistor array manufactured by Diodes Incorporated. It integrates two independent NPN silicon transistors within an SM-8 (SOT-223) surface-mount package. The device supports a continuous collector current of 2A and a collector-emitter breakdown voltage of 60V. Key electrical specifications include a transition frequency of 175MHz, a total power dissipation of 2.75W when both dies are active, and a maximum operating junction temperature of +150°C.

Feature Summary

• Dual configuration providing two independent NPN transistors in a single compact package
• Medium power capability with high peak pulse current handling
• High-speed switching performance suitable for demanding applications

Applications

• General-purpose amplification circuits
• Switching applications requiring moderate power levels
• Driver stages in electronic control systems

Procurement Notes

Verify the specific ordering suffix to confirm the exact packaging format, as variations exist between tape-and-reel and cut-tray options. Confirm that the component meets RoHS compliance requirements if restricted substances are a constraint for the assembly process. Ensure the supplier provides traceability documentation consistent with the manufacturer's standards.

Selection Notes

Select this component when a dual NPN configuration is required to save board space compared to discrete solutions. Evaluate the thermal resistance characteristics against the expected ambient temperature and PCB copper area to ensure adequate heat dissipation. Compare the transition frequency and saturation voltages against circuit speed and efficiency requirements.

Part Context

This part belongs to the ZDT651 series of dual NPN medium power transistors. The 'TC' suffix typically denotes a specific packaging variant, such as a tray or reel option, rather than a change in internal die functionality. Other variants like ZDT651TA may offer different packaging configurations while maintaining identical electrical parameters.

Replacement Considerations

Direct replacements must match the SM-8/SOT-223-8 footprint and provide equivalent 60V/2A ratings. Verify pinout compatibility, specifically the arrangement of collectors, bases, and emitters, as internal wiring can vary between manufacturers.