2SC945A-T-A

Single Bipolar Transistors Overview

The NEC Corporation 2SC945A-T-A is an NPN silicon epitaxial planar transistor housed in a TO-92 plastic package. Designed for audio frequency amplifier driver stages and low-speed switching applications, it features high voltage capability and excellent hFE linearity. Key electrical ratings include a collector current (Ic) of 150mA, a collector-emitter breakdown voltage (Vceo) of 50V, and a rated power dissipation of 250mW. The device offers specific DC current gain classifications, such as the 'R' grade with an hFE range of 90 to a defined upper limit.

Single Bipolar Transistors Feature Summary

• High voltage capability suitable for demanding circuit environments
• Excellent hFE linearity ensuring consistent amplification performance
• Designed specifically for audio frequency amplifier driver stages

Single Bipolar Transistors Applications

• Audio frequency amplifier driver stages
• Low-speed switching applications

Single Bipolar Transistors Procurement Notes

Verify the manufacturer origin carefully, as the 2SC945 designation is widely produced by multiple vendors including Dc Components and Unisonic Technologies. Confirm that the specific suffix '-T-A' corresponds to NEC's original packaging or binning specifications if strict OEM sourcing is required. Cross-reference datasheets from different manufacturers to ensure pinout compatibility and parameter alignment before integration.

Single Bipolar Transistors Selection Notes

Select this component when designing circuits requiring moderate voltage handling and linear amplification characteristics within a compact through-hole package. It is appropriate for general-purpose audio pre-amplification where high-frequency performance is not the primary constraint. Consider alternative packages like SOT-23 if board space is limited, though the TO-92 form factor remains standard for prototyping and legacy designs.

Single Bipolar Transistors Part Context

This part belongs to the broader family of small-signal NPN bipolar junction transistors commonly used in consumer electronics and audio equipment. While originally associated with NEC, the 2SC945 specification is now fulfilled by various semiconductor manufacturers globally. It serves as a fundamental building block for analog signal processing tasks requiring reliable switching and amplification capabilities.

Single Bipolar Transistors Replacement Considerations

Direct substitutes include generic 2SC945 equivalents from other manufacturers provided they meet the 50V Vceo and 150mA Ic requirements. Verify hFE binning compatibility if linear performance is critical. For surface-mount replacements, consider SOT-23 variants with matching electrical characteristics, ensuring thermal dissipation limits are respected.