2SC4081-B-TP

Single Bipolar Transistors Overview

The 2SC4081-B-TP is an NPN silicon epitaxial transistor manufactured by Micro Commercial Components. It operates with a continuous collector current of 150 mA and power dissipation of 200 mW in the SOT-323 package. Key electrical ratings include a collector-emitter voltage of 50 V, collector-base voltage of 60 V, and emitter-base voltage of 7 V. The device features a transition frequency of 180 MHz and a DC current gain ranging from 120 to 560 depending on the classification rank. It supports an operating junction temperature range from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• Complementary to the 2SC1576A PNP transistor for matched circuit applications
• Manufactured using low cob process technology
• Halogen-free green device compliant with UL 94 V-0 flammability rating
• Moisture sensitivity level 1 for standard surface mount handling

Single Bipolar Transistors Applications

• General purpose amplification circuits
• Switching applications requiring small signal control
• Complementary pairs with 2SC1576A in driver stages

Single Bipolar Transistors Procurement Notes

Verify the specific hFE classification rank (BQ or BR) required for your design, as the datasheet defines distinct gain ranges for each. Confirm that the tape and reel packaging contains 3000 pieces per reel. Ensure the ordering suffix matches the RoHS compliant finish designated by the manufacturer. Cross-reference the pinout configuration against your PCB footprint to avoid installation errors during assembly.

Single Bipolar Transistors Selection Notes

Select this component when a compact NPN solution is needed with a maximum collector current of 150 mA. The SOT-323 package is suitable for space-constrained designs. Consider the complementary 2SC1576A if a matched pair is required for push-pull configurations. Evaluate the thermal resistance of 625°C/W to ensure adequate heat dissipation within the specified ambient temperature limits.

Single Bipolar Transistors Part Context

This part belongs to the 2SC4081 family of NPN silicon epitaxial transistors. It is designed for general-purpose use in consumer electronics and industrial equipment. The device utilizes a surface-mount SOT-323 form factor to facilitate automated assembly processes. It serves as a standard replacement for legacy through-hole equivalents in modern miniaturized circuit boards.

Single Bipolar Transistors Replacement Considerations

The 2SC1576A is documented as the complementary counterpart. Verify pin compatibility and electrical parameters before substituting with other NPN transistors in the SOT-323 package.

Single Bipolar Transistors FAQ

What are the available DC current gain classifications?

The datasheet specifies two main gain ranges: Rank BQ covers 120 to 270, and Rank BR covers 180 to 390.

Is the device halogen-free?

Yes, the 2SC4081 is defined as a halogen-free green device containing less than 900ppm bromine and chlorine combined.

What is the maximum operating junction temperature?

The maximum operating junction temperature is +150°C.