2SC4081RT1G

Single Bipolar Transistors Overview

The onsemi 2SC4081RT1G is a single NPN bipolar junction transistor (BJT) designed for general-purpose switching and small-signal amplification. It operates with a maximum collector-emitter voltage of 50 V and a continuous collector current of 150 mA. The device features a transition frequency of 180 MHz and a DC current gain (hFE) ranging from 120 to 390 at 1 mA and 6 V. Packaged in the UMT3 (SOT-323) surface-mount format, it dissipates up to 200 mW of power and supports a junction temperature of 150°C.

Single Bipolar Transistors Feature Summary

• Low collector capacitance for high-speed performance
• Complementary pairing with PNP transistors
• Automotive-grade reliability qualification

Single Bipolar Transistors Applications

• General-purpose switching circuits
• Small signal amplification stages
• Automotive electronic systems

Single Bipolar Transistors Procurement Notes

Verify the specific suffix against official documentation to confirm package type and automotive grade status. Confirm RoHS compliance and lead times directly with authorized distributors. Ensure the component meets the required operating temperature range for the target application environment before finalizing procurement.

Single Bipolar Transistors Selection Notes

Select this component for applications requiring low-voltage, low-current NPN switching or amplification in compact designs. Consider its complementary PNP counterpart for push-pull configurations. Verify that the SOT-323 footprint fits the PCB layout constraints and that the thermal dissipation requirements are within the specified limits for the intended enclosure.

Single Bipolar Transistors Part Context

This part belongs to the 2SC4081 series of general-purpose NPN transistors manufactured by onsemi. It is commonly paired with the 2SA1576 PNP transistor to form complementary pairs for balanced circuit designs. The series is widely used in consumer electronics and automotive modules where space efficiency and reliable switching are critical.

Single Bipolar Transistors Replacement Considerations

• 2PC4081Q,135

Single Bipolar Transistors FAQ

What is the complementary PNP transistor for the 2SC4081?

The 2SC4081 is typically complemented by the 2SA1576 PNP transistor.

Is the 2SC4081 qualified for automotive applications?

Yes, specific variants such as the 2SC4081U3HZG are AEC-Q101 qualified for automotive use.

What is the typical collector capacitance value?

The typical collector capacitance is 2.0 pF.