BB 555 E7912

Overview

The BB 555 E7912 is a single silicon 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. Key electrical specifications include a capacitance of 2.3 pF at 28 V reverse bias measured at 1 MHz, with a capacitance ratio of 9.8 defined as C1/C28. The component is classified as obsolete and was supplied in tape and reel packaging.

Feature Summary

• Single-channel varactor diode construction utilizing silicon technology
• Surface-mount design compatible with automated assembly processes
• Wide operating temperature range suitable for demanding environments

Applications

• Frequency tuning circuits in radio frequency systems
• Voltage-controlled oscillator (VCO) implementations
• Phase-locked loop (PLL) filter networks

Procurement Notes

This component is officially discontinued and no longer available from the manufacturer. Verification of authenticity is critical when sourcing from secondary markets due to potential obsolescence risks. Engineers should confirm device integrity through rigorous testing before integration into production designs.

Selection Notes

Designers requiring this specific capacitance profile must evaluate current alternative components from the same family or newer generations. Compatibility checks regarding package dimensions and thermal characteristics are necessary when substituting obsolete parts in existing layouts.

Part Context

The BB 555 series represents Infineon's portfolio of silicon variable capacitance diodes. These devices are engineered for precision tuning applications where stable capacitance variation under reverse bias is required. The E7912 suffix denotes specific packaging and handling configurations for surface-mount technology.

Replacement Considerations

Verify equivalent performance metrics such as capacitance ratio and reverse voltage ratings when selecting substitutes. Ensure that any replacement part maintains compatibility with the original SCD-80 footprint or requires layout modification.