ZC831BTC

Overview

The ZC831BTC is a single-path varactor diode manufactured by Diodes Incorporated, housed in an SOT-23-3 surface-mount package. It features a maximum peak reverse voltage of 25 V and operates within a junction temperature range of -55°C to 150°C. Key electrical specifications include a capacitance of 15.75 pF at 2 V and 1 MHz, with a Q value of 300 at 3 V and 50 MHz. The device exhibits a capacitance ratio of 6.0 under C2/C20 conditions. This component is classified as discontinued.

Feature Summary

• Single-channel varactor design for tuning applications
• Surface-mount construction in compact SOT-23-3 packaging
• Wide operating temperature range suitable for industrial environments

Applications

• Voltage-controlled oscillator (VCO) tuning circuits
• RF filter frequency adjustment
• Phase-locked loop (PLL) synthesizer networks

Procurement Notes

This part number is officially listed as discontinued by the manufacturer. Verification of current availability requires checking authorized distributors for remaining stock or obsolete inventory. Engineering teams should initiate replacement qualification processes immediately due to end-of-life status. Confirm RoHS3 compliance through official datasheets before procurement attempts.

Selection Notes

Designers must evaluate the 15.75 pF baseline capacitance and 6.0 ratio against circuit requirements. The SOT-23-3 footprint limits thermal dissipation compared to larger packages. Verify that the 25 V reverse voltage rating exceeds peak RF swing voltages in the target application to prevent breakdown. Consider parasitic effects at high frequencies given the 50 MHz Q specification.

Part Context

The ZC831BTC belongs to the ZC831B series of discrete semiconductor varactors. It serves as a solid-state variable capacitor alternative to mechanical tuning elements. The component supports high-frequency signal processing tasks where precise capacitance modulation via DC bias voltage is required. Its discontinuation impacts legacy designs utilizing this specific Diodes Incorporated varactor family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers must identify equivalent varactors based on matching capacitance ratios, voltage ratings, and package dimensions from other manufacturers.