1SV285TPH3F

Overview

The 1SV285TPH3F is a single varactor diode manufactured by Toshiba Semiconductor and Storage, designed for surface-mount applications in the ESC (SOD-523) package. It features a maximum peak reverse voltage of 10 V and operates at junction temperatures up to 125°C. The device exhibits a capacitance of 2.35 pF at 4 V reverse bias and 1 MHz frequency, with a capacitance ratio of 2.3 measured under C1/C4 conditions. This component is classified as obsolete and not recommended for new designs.

Feature Summary

• Single-channel varactor configuration optimized for compact surface-mount layouts
• Capacitance modulation capability defined by specific reverse voltage ratios
• Thermal stability maintained up to 125°C junction temperature

Applications

• RF tuning circuits requiring variable capacitance
• Voltage-controlled oscillator (VCO) implementations
• Frequency modulation modules

Procurement Notes

Verify current availability status as the part is marked as not suitable for new designs. Confirm package compatibility with existing PCB footprints before integration. Check for end-of-life notices or obsolescence warnings from the manufacturer to ensure long-term supply chain stability for existing production runs.

Selection Notes

Select this component only if the 10 V reverse voltage rating and 2.35 pF baseline capacitance align with circuit requirements. Ensure the design accommodates the specified 2.3 capacitance ratio for adequate tuning range. Consider alternative active components if newer design recommendations are required for future projects.

Part Context

This device belongs to the 1SV285 series of varactor diodes from Toshiba. It shares the basic 1SV285 architecture but utilizes the TPH3F suffix indicating the specific ESC/SOD-523 surface-mount packaging format. The series is generally utilized in RF applications where small signal variable capacitance is necessary.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate generic SOD-523 varactors with comparable 10 V ratings and similar capacitance values if replacement is necessary due to obsolescence.