2N4921

Single Bipolar Transistors Overview

The onsemi 2N4921G is a medium-power NPN silicon transistor designed for driver circuits, switching, and amplifier applications. It features a collector-emitter voltage of 40 Vdc, continuous collector current of 1.0 Adc, and peak collector current of 3.0 Adc. The device offers a total power dissipation of 30 W at 25°C case temperature with a thermal resistance of 4.16 °C/W. Operating junction temperatures range from -65 to +150 °C.

Single Bipolar Transistors Feature Summary

• Low saturation voltage
• Excellent power dissipation
• Excellent safe operating area

Single Bipolar Transistors Applications

• Driver circuits
• Switching applications
• Amplifier applications

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix (e.g., G) against the manufacturer's current documentation to confirm package type and compliance status. Confirm availability as this device may be discontinued or subject to last-time-buy restrictions. Ensure the procurement channel provides official datasheets matching the exact part number variant.

Single Bipolar Transistors Selection Notes

Select the 2N4921G when a 40 V collector-emitter rating is required. Compare its 1 A continuous current capability against load requirements. Evaluate the TO-225 package for thermal management needs relative to the 30 W dissipation limit. Consider the complementary PNP 2N4920G if push-pull configurations are necessary.

Single Bipolar Transistors Part Context

This component belongs to the 2N492x series of medium-power plastic NPN silicon transistors manufactured by onsemi. The series includes variants with different voltage ratings: 2N4921G (40 V), 2N4922G (60 V), and 2N4923G (80 V). All share similar current handling and packaging characteristics.

Single Bipolar Transistors Replacement Considerations

Consult the manufacturer for recommended substitutes as the device is marked discontinued. Verify pinout compatibility and electrical parameters such as VCEO and IC limits before considering alternative components.