2SC3400

Overview

The onsemi 2SC3400 is a single, pre-biased NPN bipolar junction transistor designed for through-hole applications. It features an integrated biasing network within the 3-SPA package. The device supports a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA. It offers a transition frequency of 250 MHz and a power dissipation rating of 300 mW. This component simplifies circuit design by eliminating external bias resistors while maintaining standard small-signal performance characteristics.

Feature Summary

• Integrated pre-biasing network reduces external component count
• NPN polarity with epitaxial planar silicon construction
• Through-hole mounting configuration for reliable mechanical attachment

Applications

• General-purpose signal amplification
• Switching circuits requiring simplified biasing
• Small-signal processing stages

Procurement Notes

Verify the manufacturer marking matches onsemi specifications rather than relying solely on the 2SC prefix, which indicates historical Sanyo origin. Confirm the package type is 3-SPA and that the device is explicitly listed as NPN pre-biased. Cross-reference the datasheet to ensure the internal resistor values align with your circuit requirements before procurement.

Selection Notes

Select this component when a compact solution for NPN switching or amplification is required without external bias resistors. Ensure the 50 V voltage rating and 100 mA current limit meet the load requirements. Consider the 3-SPA package dimensions for PCB layout constraints compared to standard TO-92 packages.

Part Context

This part belongs to the family of pre-biased bipolar transistors, combining a BJT with internal resistors. While the 2SC designation originates from Sanyo Semiconductor, onsemi now manufactures this specific variant. It serves as a modern replacement for discrete resistor-transistor networks in consumer electronics and industrial control systems.

Replacement Considerations

Direct substitutes include other single NPN pre-biased transistors in the 3-SPA package with matching 50 V and 100 A ratings. Verify internal resistance values match the original design to ensure equivalent biasing behavior.