FJX3015RTF

Overview

The FJX3015RTF is an NPN epitaxial silicon transistor with a built-in bias resistor network, manufactured by onsemi. It operates with a collector-emitter voltage of 50 V and a collector current of 100 mA. The device features a DC current gain (hFE) of 33 at IC=10mA and a saturation voltage of 0.3 V. Internal resistors are specified as R1=2.2 kΩ and R2=10 kΩ. Packaged in SOT-323, it supports junction temperatures up to 150 °C and offers a current gain bandwidth product of 250 MHz.

Feature Summary

• Integrated bias resistor network simplifies circuit design for switching applications
• High-speed switching capability supported by 250 MHz current gain bandwidth product
• Low saturation voltage ensures efficient power dissipation during conduction

Applications

• Switching circuits
• Inverter applications
• Interface circuits
• Driver circuits

Procurement Notes

Verify the component origin carefully, as Fairchild Semiconductor was acquired by onsemi. Confirm that the specific ordering suffix corresponds to the tape-and-reel packaging format required for automated assembly processes. Ensure the datasheet revision matches the manufacturing batch specifications.

Selection Notes

Select this component when a compact NPN solution with integrated base resistance is required. The fixed internal resistor values eliminate external biasing components. Verify that the 100 mA collector current rating meets the load requirements and that the SOT-323 package dimensions fit the available PCB space constraints.

Part Context

This part belongs to the FJX series of prebiased transistors designed for high-density surface mount applications. The 'R' suffix typically indicates reel packaging, while 'TF' denotes specific taping configurations. These devices consolidate discrete transistor and resistor functions into a single small outline package.

Replacement Considerations

Check for direct equivalents from other manufacturers offering identical pinouts and internal resistor ratios. Verify thermal performance characteristics match the original specifications if operating near maximum ratings.