BFHKI-4951+

Overview

The BFHKI-4951+ is a miniature low temperature co-fired ceramic (LTCC) ultra-high stopband rejection band pass filter with a 4.3 to 5.3 GHz passband supporting a center frequency of 4.8 GHz and a bandwidth of 1000 MHz. It features an integrated interposer board, 50Ω impedance, and shielded construction. The component exhibits typical insertion loss of 3.8 dB and wide stopband rejection of approximately 60 dB up to 12.3 GHz. Its compact surface-mount package measures 4.95 mm x 3.65 mm.

Feature Summary

• Ultra-high stopband rejection capability extending up to 12.3 GHz
• Integrated interposer board for simplified circuit integration
• Shielded construction ensuring signal integrity

Applications

• S-band upconverter assemblies
• RF front-end filtering in wireless communication systems
• Microwave receiver input stages

Procurement Notes

Verify the specific datasheet revision and electrical test data against Mini-Circuits official documentation before finalizing procurement. Confirm that the LTCC construction and shielded package dimensions align with your PCB layout requirements. Ensure compatibility with standard surface-mount assembly processes for components of this physical size.

Selection Notes

Select this component when high out-of-band rejection is critical within the S-band spectrum. The integrated interposer simplifies design complexity compared to discrete filter implementations. Consider the 3.8 dB insertion loss impact on system noise figure and power budget during link calculations.

Part Context

This part belongs to the BFHKI series from Mini-Circuits, which specializes in miniature RF filters. The series utilizes LTCC technology to achieve high performance in small form factors. These components are designed for demanding microwave applications requiring precise frequency selection and interference suppression.

Replacement Considerations

No public confirmed substitute part numbers are available for direct replacement.