KSC1393RBU

Overview

The KSC1393RBU is an NPN epitaxial silicon transistor designed for VHF tuner and RF amplifier applications. It features a collector-base voltage of 30V, a collector-emitter voltage of 30V, and a maximum collector current of 20mA. The device exhibits a typical current gain bandwidth product (fT) of 700MHz and a maximum noise figure of 3.0dB at 200MHz. Reverse transfer capacitance is limited to 0.5pF maximum. It utilizes a TO-92 package with lead-free construction.

Feature Summary

• High current gain bandwidth product suitable for VHF frequency operations
• Low noise figure optimized for RF amplifier stages
• Minimal reverse transfer capacitance for improved signal isolation

Applications

• VHF tuner circuits
• RF amplifier forward automatic gain control (AGC)
• General-purpose VHF amplification

Procurement Notes

Verify the manufacturer origin as Fairchild Semiconductor or authorized onsemi distributor. Confirm the specific ordering suffix matches the required package variant. Ensure RoHS compliance documentation aligns with project requirements. Check datasheet revision status for any updated electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when designing VHF front-end circuits requiring low noise performance. The high fT ensures adequate gain at target frequencies. Verify that the 20mA collector current limit meets the load requirements. Consider the TO-92 through-hole package constraints for PCB layout and thermal management during the design phase.

Part Context

This part belongs to the KSC1393 family of NPN RF transistors originally manufactured by Fairchild Semiconductor. The RBU suffix typically denotes a specific tape-and-reel packaging configuration within the standard TO-92 form factor. It serves as a discrete solution for analog RF signal processing in consumer electronics.

Replacement Considerations

Consult official cross-reference lists for direct equivalents. Verify pinout compatibility and absolute maximum ratings match the original design constraints. Ensure replacement devices maintain similar noise figure and bandwidth characteristics for circuit stability.