FJX3008RTF

Overview

The FJX3008RTF is a single NPN silicon epitaxial digital transistor manufactured by onsemi. It integrates an internal base resistor network to simplify circuit design and reduce component count. The device features a maximum collector-emitter voltage (VCEO) of 50 V and supports a continuous collector current of 100 mA with a peak current rating of 100 mA. Typical input resistance is 47 kOhms, providing a typical resistor ratio of 2.1. Power dissipation is rated at 200 mW. The minimum DC collector/base gain (hfe) is 56. Operating temperature ranges from -55°C to +150°C. It is housed in an SOT-323-3 surface mount package.

Feature Summary

• Integrates NPN bipolar junction transistor with built-in biasing resistors for simplified switching applications
• Utilizes SOT-323-3 surface mount packaging for compact board space utilization
• Supports high operating temperatures up to +150°C for robust thermal performance

Applications

• General purpose switching circuits
• Logic interface buffering
• Driver stages for low-power loads

Procurement Notes

Verify the product status carefully before procurement as this component is listed as obsolete and end-of-life. Confirm availability through authorized distributors or secondary market suppliers, noting that stock levels may be limited. Ensure that the SOT-323-3 package dimensions match your PCB footprint requirements. Validate that the electrical parameters meet your specific circuit design needs despite the discontinued status.

Selection Notes

Select this component only if its 50 V voltage rating and 100 mA current capacity align with the target application requirements. Consider the integrated 47 kOhm input resistance for base drive calculations. Evaluate the 200 mW power dissipation limit against expected thermal conditions. Verify compatibility with surface mount assembly processes given the small SOT-323-3 form factor.

Part Context

This part belongs to the FJX3008R series of pre-biased digital transistors from onsemi. These devices combine NPN transistors with internal resistors to replace multiple discrete components. The series is designed for cost-sensitive, space-constrained applications requiring simple switching functionality. The RTF suffix indicates the specific tape and reel packaging configuration used for automated assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct pin-to-pin replacements should be verified against official datasheets. Cross-reference with other NPN digital transistors in the SOT-323 package having similar VCEO and Ic ratings.