FJN4302RTA

Overview

The FJN4302RTA is a PNP epitaxial silicon transistor with built-in bias resistors, manufactured by ON Semiconductor. It features a maximum collector current of -100 mA and a collector-emitter voltage rating of -50 V. The device integrates two resistors, R1 and R2, both nominally 10 kΩ, resulting in a resistor ratio of 1.0. Key electrical characteristics include a DC current gain (hFE) minimum of 30 at -5 mA, a saturation voltage of -0.3 V at -10 mA, and a cutoff current of -0.1 μA. Thermal performance specifies a power dissipation of 300 mW and a junction-to-ambient thermal resistance of 416 °C/W. The component is housed in a TO-92 package.

Feature Summary

• Integrates dual bias resistors to reduce component count and simplify circuit design
• Provides high output current capability for switching applications
• Offers low input-off voltage for reliable digital logic interfacing

Applications

• Switching circuits
• Interface and driver circuits
• Inverters
• Digital applications in industrial segments

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packing method details. Ensure compliance with RoHS standards and lead-free requirements as specified in the datasheet. Confirm that the part number matches the updated nomenclature following the Fairchild Semiconductor integration into ON Semiconductor systems.

Selection Notes

Select this component when space-saving solutions are required for PNP switching tasks. The integrated bias network eliminates external base resistors, reducing board area. Verify that the -50 V voltage rating and -100 mA current limits meet the application's peak stress requirements. Consider the TO-92 package constraints for thermal management in enclosed environments.

Part Context

This component belongs to the FJN4302R series of pre-biased transistors. Originally developed by Fairchild Semiconductor, it is now managed under the ON Semiconductor portfolio. The 'TA' suffix specifically denotes the TO-92 3L Ammo packing method, distinguishing it from bulk or tape-and-reel variants within the same electrical family.

Replacement Considerations

Cross-reference with other PNP pre-biased transistors offering similar 10kΩ/10kΩ internal resistor ratios. Verify pinout compatibility and absolute maximum ratings before substitution.