GCX1209-23-0

Overview

The GCX1209-23-0 is a surface-mount variable capacitance diode from the GC1200 series, manufactured by Microsemi (now part of Microchip Technology). It features an abrupt junction silicon design housed in an SOT-23 package. The device provides a nominal diode capacitance of 8.2 pF at zero bias and supports a maximum repetitive peak reverse voltage of 30 V. It exhibits a minimum quality factor of 2000 and low series resistance, making it suitable for narrow to moderate frequency bandwidth applications ranging from HF through 1500 MHz.

Feature Summary

• Abrupt junction silicon construction for high Q performance
• Low series resistance characteristics
• RoHS compliant packaging

Applications

• Low phase noise voltage controlled oscillators
• Low loss voltage variable filters
• Phase shifters

Procurement Notes

Verify the manufacturer designation carefully, as the GC1200 series was originally produced by Microsemi before its acquisition by Microchip Technology. Confirm that the specific suffix -23-0 corresponds to the single configuration in the SOT-23 package rather than the common cathode variant. Ensure compliance with current RoHS directives per EU Directive 2002/95/EC when sourcing components for production.

Selection Notes

Select this component for designs requiring high Q factors and low series resistance within the 30 V reverse voltage limit. The 8.2 pF nominal capacitance is appropriate for tuning circuits operating between HF frequencies and 1500 MHz. Consider the standard ±10% capacitance tolerance during circuit simulation. Verify thermal management requirements for the small SOT-23 footprint if power dissipation is significant in the target application.

Part Context

This part belongs to the GC1200-GCX1217 series of surface mount varactors. These devices supersede the older GC1200-23 series and are designed for commercial surface mount construction. The series offers a large selection of capacitance values optimized for low phase noise and high efficiency in RF tuning applications across various communication systems.

Replacement Considerations

The GCX1209-23-0 supersedes the GC1209-23-0 part number within the same product family. When replacing older inventory, ensure the new GCX prefix parts meet the same electrical specifications for capacitance and Q factor.