2SC3851

Single Bipolar Transistors Overview

The Sanken 2SC3851 is a silicon NPN epitaxial planar transistor housed in a TO-220F package. It features a maximum collector current of 4A and a collector-emitter breakdown voltage of 60V. The device supports a maximum power dissipation of 25W at 25°C case temperature, with a junction temperature rating up to 150°C. Electrical characteristics include a DC current gain (hFE) ranging from 40 to 320 at 1A/4V, a saturation voltage of 0.5V max at 2A/0.2A base drive, and a transition frequency of 15MHz typical.

Single Bipolar Transistors Feature Summary

• Designed for high-voltage applications including audio amplifiers and switching power supplies
• Complements the 2SA1488/PNP transistor pair for push-pull configurations
• Capable of handling high peak currents within defined safe operating areas

Single Bipolar Transistors Applications

• Audio amplifier output stages
• High voltage power supply circuits
• General purpose switching applications

Single Bipolar Transistors Procurement Notes

Verify the specific suffix or variant against the official datasheet before ordering, as electrical limits may differ between standard and A-rated versions. Confirm thermal management requirements align with the derating curves provided in the documentation. Ensure the TO-220F footprint matches the target PCB layout specifications.

Single Bipolar Transistors Selection Notes

Select this component when a 60V NPN transistor with 4A continuous current capability is required. Consider the complementary 2SA1488 for matched pairs in audio or linear regulator designs. Evaluate thermal resistance constraints if operating without an infinite heatsink, as power dissipation drops significantly above ambient temperatures.

Single Bipolar Transistors Part Context

This part belongs to Sanken's discrete bipolar transistor lineup, specifically engineered for power electronics. It serves as a high-performance alternative in general-purpose power switching and linear regulation circuits where moderate voltage blocking and substantial current handling are necessary.

Single Bipolar Transistors Replacement Considerations

The 2SC3851A is a verified variant with higher breakdown voltage ratings (80V VCEO). Verify pinout compatibility and thermal characteristics before substituting generic equivalents.