BB148,115

Overview

The BB148,115 is a silicon planar varactor diode manufactured by NXP USA Inc. Designed for VHF and UHF frequency bands, this component utilizes a plastic surface-mount package with two terminals. It functions as a voltage-controlled variable capacitance device, where the junction capacitance varies in response to the applied reverse bias voltage. The device is constructed from silicon material and is compliant with RoHS standards, indicating it is lead-free and free from specific hazardous substances. Its primary electrical characteristic is its tunable capacitance range, which allows for precise frequency adjustment in resonant circuits operating within the specified high-frequency spectrum.

Feature Summary

• Voltage-controlled variable capacitance functionality
• Silicon planar construction for reliability
• Surface-mount packaging for automated assembly

Applications

• VHF/UHF tuning circuits
• Frequency synthesizers
• RF filters
• Oscillator circuits

Procurement Notes

Verify the specific suffix and tape-and-reel quantity against the current distributor datasheet, as packaging configurations may vary. Confirm RoHS compliance status and REACH SVHC declarations directly with the manufacturer or authorized agent prior to procurement. Ensure the ordering part number matches the exact package variant required for the PCB footprint.

Selection Notes

Select this component based on the required capacitance ratio and maximum reverse voltage ratings for the target application frequency. Compare the specific capacitance values at minimum and maximum bias voltages against circuit simulation requirements. Verify that the package dimensions align with the available board space and that the thermal characteristics are suitable for the expected power dissipation levels in the design.

Part Context

The BB148 belongs to NXP's portfolio of discrete semiconductor components, specifically within the category of variable capacitance diodes. These devices are essential for electronic tuning applications where mechanical variable capacitors are impractical due to size or reliability constraints. The BB148,115 designation indicates the base part number along with the specific packaging and trailing zero suffix used for logistics and identification.

Replacement Considerations

Consult official NXP documentation for direct cross-reference part numbers. When evaluating alternatives, ensure the replacement offers equivalent capacitance ranges, Q-factor performance, and reverse breakdown voltage specifications. Verify that the physical package dimensions and pinout configuration are compatible with the existing PCB layout to avoid redesign efforts.