2SD1667S

Single Bipolar Transistors Overview

The 2SD1667S is a single NPN silicon bipolar junction transistor manufactured by onsemi. It features a collector current rating of 5 A and a collector-emitter voltage of 50 V. The device operates with a transition frequency of 30 MHz and supports a power dissipation of 2 W. It is housed in a TO-220ML through-hole package, designed for robust thermal management and reliable performance in general-purpose switching and amplification applications.

Single Bipolar Transistors Feature Summary

• Single NPN silicon construction for standard bipolar switching
• TO-220ML flange mount package for effective heat dissipation
• Isolated case connection for safe mounting to heatsinks

Single Bipolar Transistors Applications

• General-purpose power switching circuits
• Amplifier stages requiring moderate current handling
• Industrial control systems utilizing through-hole mounting

Single Bipolar Transistors Procurement Notes

Verify the specific suffix 'S' against the manufacturer's official datasheet to confirm exact mechanical dimensions and electrical tolerances. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with onsemi's current production status to avoid obsolete stock issues. Confirm that the TO-220ML package variant matches the required board layout constraints.

Single Bipolar Transistors Selection Notes

Select this component when a 5 A NPN transistor with 50 V breakdown is required in a TO-220ML form factor. Consider the 30 MHz transition frequency for medium-speed switching needs. Evaluate the 2 W power dissipation capability relative to the expected thermal environment. Compare against alternative packages if higher current density or surface-mount integration is necessary for the design.

Single Bipolar Transistors Part Context

This component belongs to the discrete semiconductor category, specifically within the bipolar junction transistor (BJT) family. Originally associated with Sanyo Semiconductor, which was acquired by onsemi, the product line continues under the onsemi brand. The 2SD1667 series represents a legacy of high-reliability power transistors widely used in established industrial and consumer electronics designs.

Single Bipolar Transistors Replacement Considerations

Consult official cross-reference lists for direct substitutes such as the 2SD1667 without the suffix, ensuring pinout compatibility. Verify equivalent electrical parameters including hFE ranges and saturation voltages before substitution.