PN3642

Single Bipolar Transistors Overview

The PN3642 is an NPN silicon bipolar junction transistor (BJT) manufactured by Central Semiconductor, distributed under the Fairchild Semiconductor brand. It features a collector-emitter voltage of 45V and a collector-base voltage of 60V. The device supports a continuous collector current of 500mA with a power dissipation rating of 625mW in a TO-92-3 through-hole package. Key electrical characteristics include a gain-bandwidth product of 150MHz and a saturation voltage of 220mV. Operating temperatures range from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• NPN silicon construction for reliable switching and amplification
• Through-hole TO-92-3 packaging for standard board mounting
• High thermal stability supporting extended temperature ranges

Single Bipolar Transistors Applications

• General-purpose signal amplification circuits
• Low-power switching applications
• Audio pre-amplifier stages

Single Bipolar Transistors Procurement Notes

Verify the manufacturer designation carefully, as the PN3642 is produced by Central Semiconductor. Ensure the specific suffix matches your requirements, such as PBFREE for lead-free compliance. Confirm the package type is TO-92-3 and check RoHS status against your assembly specifications before ordering.

Single Bipolar Transistors Selection Notes

Select this component when a low-cost NPN BJT with moderate current handling is required. The TO-92-3 package suits manual or wave soldering processes. Consider the 500mA limit and 625mW dissipation for thermal management. Verify that the 45V VCEO meets the circuit's voltage headroom needs.

Single Bipolar Transistors Part Context

This part belongs to the general-purpose discrete semiconductor category. It serves as a fundamental active element in analog and digital logic interfaces. The TO-92 form factor remains common in consumer electronics and industrial control boards requiring robust, low-profile transistors.

Single Bipolar Transistors Replacement Considerations

Consult official datasheets for direct pin-compatible substitutes like the 2N3904 or BC547. Verify that alternative parts meet or exceed the 45V VCEO and 500mA IC ratings. Check hFE gain ranges to ensure compatibility with existing bias networks.