FJN3302RBU

Overview

The FJN3302RBU is an NPN epitaxial silicon transistor with built-in bias resistors, manufactured by onsemi. It features a collector-emitter voltage (VCEO) of 50 V and a continuous collector current (IC) of 100 mA. The device includes integrated bias resistors R1 and R2, both typically valued at 10 kΩ, with a resistor ratio of 1.0. Power dissipation is rated at 300 mW, with a junction temperature range up to 150 °C. The component is housed in a TO-92 package with three leads.

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 packaging details such as tape and reel versus ammo pack. Confirm availability status as distribution channels may list obsolete or discontinued inventory. Ensure compliance with RoHS directives and check for any process change notifications that might affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when space-saving solutions are required due to its integrated bias network. Compare the 10 kΩ internal resistance values against external resistor requirements in similar designs. Evaluate the thermal resistance and power derating curves for ambient temperature conditions. Consider the DC current gain and saturation voltage specifications for load driving capabilities.

Part Context

This part belongs to the FJN3302R series of NPN transistors with built-in resistors. Originally developed by Fairchild Semiconductor, the product line is now managed by onsemi. The series complements PNP variants like the FJN4302R, providing matched pairs for complementary push-pull configurations in digital logic and interface applications.

Replacement Considerations

Check for direct equivalents from other manufacturers offering identical 10k/10k bias ratios and TO-92 packaging. Verify pinout compatibility (Emitter, Collector, Base) to ensure drop-in replacement feasibility without PCB redesign.