2SC3950D

Single Bipolar Transistors Overview

The onsemi 2SC3950D is a high-frequency NPN silicon epitaxial planar transistor housed in a TO-126 plastic package. It features a transition frequency (fT) of 2.0 GHz and supports a maximum collector current (IC) of 500 mA. The device provides a collector-emitter breakdown voltage (VCEO) of 120 V and dissipates up to 1.3 W of power. Designed for wide-band applications, it offers high gain and low noise characteristics suitable for demanding RF and video output circuits.

Single Bipolar Transistors Feature Summary

• High transition frequency of 2.0 GHz for wide-band signal processing
• Robust 500 mA collector current capacity for high-power drive requirements
• Plastic TO-126 package construction without mica insulation

Single Bipolar Transistors Applications

• High-definition CRT display video output drivers
• Wide-band amplifiers
• RF signal processing stages

Single Bipolar Transistors Procurement Notes

Verify the specific suffix 'D' against the official datasheet to confirm package type and tape/reel specifications. Confirm RoHS compliance status as manufacturing processes evolve. Check for end-of-life notices or obsolescence warnings before finalizing design-in decisions. Ensure thermal management solutions align with the 1.3 W power dissipation rating under intended operating conditions.

Single Bipolar Transistors Selection Notes

Select this component when a high-speed NPN transistor with moderate power handling is required. Compare fT and IC limits against circuit bandwidth and load requirements. Consider the TO-126 package constraints for PCB layout and heat sinking. Evaluate alternative packages if surface-mount technology is strictly mandated by the assembly process.

Single Bipolar Transistors Part Context

This device belongs to the 2SC3950 series of high-frequency transistors originally developed for video applications. The series includes variants like 2SC3951 through 2SC3954, sharing similar electrical profiles but potentially differing in packaging or binning. These components are engineered to meet the stringent speed and linearity demands of analog video signal paths.

Single Bipolar Transistors Replacement Considerations

Direct substitutes include the 2SC3951, 2SC3952, 2SC3953, and 2SC3954 from Sanyo/Panasonic. Verify pinout compatibility and exact electrical parameter matches before substitution. Cross-reference with onsemi equivalents if available.