FJY3015R

Overview

The FJY3015R is a single, pre-biased NPN bipolar junction transistor manufactured by Fairchild Semiconductor. It features an epitaxial silicon construction designed for surface-mount applications in the SOT-523F package. The device provides a collector-emitter breakdown voltage of 50 V and supports a maximum continuous collector current of 100 mA. It operates with a transition frequency of 250 MHz, making it suitable for high-speed switching and amplification tasks. The component integrates internal biasing resistors to simplify circuit design.

Feature Summary

• Single NPN pre-biased configuration
• Epitaxial silicon construction
• Surface-mount SOT-523F packaging

Applications

• High-speed switching circuits
• Amplifier stages
• Digital logic interfaces

Procurement Notes

This component is officially classified as obsolete and is no longer in production by Fairchild Semiconductor. Procurement should focus on verifying the authenticity of existing stock from authorized distributors or secondary market suppliers. Buyers must confirm the revision status and physical condition of available units, as manufacturing has ceased. Availability is limited to remaining inventory rather than new production runs.

Selection Notes

Engineers requiring this specific pre-biased NPN topology should evaluate alternative components from current Fairchild or on Semiconductor portfolios. Selection criteria must match the original 50 V rating, 100 mA current capacity, and SOT-523F footprint. Compatibility checks should verify that substitute devices maintain identical pin configurations and thermal characteristics to ensure seamless integration into existing designs without modification.

Part Context

The FJY3015R belongs to the FJY series of pre-biased transistors produced by Fairchild Semiconductor. This series integrates biasing networks directly onto the die to reduce external component count. The part represents a legacy solution for compact digital and analog applications where space efficiency and simplified biasing were critical design drivers prior to discontinuation.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided source material.