BB 857 E7902

Overview

The BB 857 E7902 is a single varactor diode manufactured by Infineon Technologies, belonging to the BB857 series. Designed for surface-mount applications in the SCD-80 package, this component operates within a junction temperature range of -55°C to 150°C and features a peak reverse voltage rating of 30 V. It exhibits a capacitance of 0.52 pF at 28 V and 1 MHz, with a capacitance ratio of 12.7 measured under C1/C28 conditions. The device is classified as obsolete and is no longer in active production.

Feature Summary

• Single-channel varactor configuration optimized for RF tuning circuits
• High capacitance ratio enabling effective frequency modulation control
• Extended thermal stability suitable for demanding operating environments

Applications

• Television tuner circuits
• Satellite receiver tuning modules
• RF signal processing systems

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Availability is restricted to remaining stock or secondary market sources. Verify authenticity through authorized distributors and confirm RoHS compliance status before integration into new designs.

Selection Notes

Engineers should evaluate alternative active components from the same family or newer generations due to the discontinued status. Ensure replacement parts match the SCD-80 footprint and electrical specifications to maintain circuit performance without redesign.

Part Context

Part of the BB857 series of varactor diodes intended for high-frequency applications. The suffix indicates specific binning or packaging variations within the standard product line. This component supports analog tuning functions in broadcast reception hardware.

Replacement Considerations

Verify cross-reference availability with equivalent single-channel varactors in SCD-80 packages. Confirm that substitute devices meet the 30 V reverse voltage and 0.52 pF capacitance requirements at 28 V bias.