FJX3007RTF

Overview

The FJX3007RTF is an NPN epitaxial silicon pre-biased transistor manufactured by Fairchild Semiconductor, now part of onsemi. This surface-mount device integrates a bias resistor network within the SOT-323 (SC-70) package to simplify circuit design and reduce component count. It features a collector-emitter voltage rating of 50 V and a continuous collector current of 100 mA. The unit supports a maximum power dissipation of 200 mW and offers a transition frequency of 250 MHz, suitable for high-speed switching applications.

Feature Summary

• Integrated bias resistor network simplifies base drive circuitry
• NPN epitaxial silicon construction ensures reliable switching performance
• Compact SOT-323 surface-mount package optimizes board space

Applications

• General-purpose signal switching circuits
• Driver stages for low-power loads
• Logic interface level shifting

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot traceability and datasheet revisions prior to procurement. Note that this component may be subject to end-of-life status; validate availability and lead times with suppliers before finalizing orders. Ensure packaging specifications match production requirements.

Selection Notes

Select this component when a compact NPN switch with integrated biasing is required. Verify that the 50 V collector-emitter voltage and 100 mA current ratings exceed circuit demands. Consider the 200 mW power dissipation limit in thermal calculations. The SOT-323 package must fit the available PCB footprint. Evaluate the 250 MHz transition frequency against signal speed requirements.

Part Context

This part belongs to the family of pre-biased bipolar junction transistors designed to replace discrete resistor-transistor combinations. It consolidates multiple components into a single surface-mount device, reducing assembly complexity and improving reliability in consumer electronics and industrial control systems.

Replacement Considerations

Consult official substitution lists from onsemi/Fairchild for verified alternatives. Cross-reference pinouts, electrical parameters, and package dimensions before replacing. Generic equivalents may not match the integrated bias resistor characteristics.