BB857H7902XTSA1

Overview

The BB857H7902XTSA1 is a single-channel varactor diode manufactured by Infineon Technologies, designed for surface-mount applications in the SCD-80 package. It features a peak reverse voltage rating of 30 V and operates within a junction temperature range of -55°C to 150°C. The device exhibits a capacitance of 0.52 pF at 28 V reverse bias and 1 MHz frequency, with a capacitance ratio of 12.7 measured under C1/C28 conditions. Classified as obsolete since December 11, 2021, this component belongs to the BB857 family and is suitable for high-frequency tuning circuits requiring precise variable capacitance control.

Feature Summary

• Single-channel varactor design optimized for surface-mount integration
• High capacitance ratio of 12.7 for effective tuning range
• Robust thermal performance supporting operation up to 150°C junction temperature

Applications

• RF circuit tuning
• Voltage-controlled oscillator (VCO) frequency adjustment
• Filter tuning networks

Procurement Notes

This component is officially discontinued and no longer in production as of December 11, 2021. Verification of authenticity is critical when sourcing from secondary markets, as availability is limited to existing stock or surplus inventory. Buyers should confirm the specific suffix XTSA1 matches their bill of materials, as packaging and tape specifications may vary among legacy distributors. Cross-referencing datasheet SP000745128 ensures technical compatibility before procurement.

Selection Notes

Select this part only if the SCD-80 package and 30 V reverse voltage rating align with the circuit design requirements. The 0.52 pF capacitance at 28 V must be verified against the target frequency range. Since the device is obsolete, alternative varactors with similar capacitance ratios and package footprints should be evaluated for long-term supply stability. Ensure the operating temperature range of -55°C to 150°C meets environmental constraints.

Part Context

The BB857H7902XTSA1 is part of the BB857 series of varactor diodes from Infineon Technologies. This series is engineered for RF applications requiring variable capacitance. The H7902 suffix denotes specific electrical characteristics and packaging details within the broader BB857 family. As an obsolete component, it represents earlier generations of RF tuning devices now replaced by newer technologies in active production lines.

Replacement Considerations

No public confirmed substitute part numbers are available for direct replacement. Engineers should evaluate other varactor diodes with comparable capacitance ratios, package types, and voltage ratings. Consult Infineon's current portfolio for modern alternatives that meet the same functional specifications.