VLF-45+

Overview

The VLF-45+ is a low-pass RF filter manufactured by Mini-Circuits, designed for signal conditioning applications. It features a cutoff frequency of 77 MHz and operates within a DC to 45 MHz passband. The component utilizes SMA termination style and maintains a 50 Ohm impedance. Typical insertion loss is specified at 1.2 dB, with high rejection capabilities reaching 50 dB at 180 MHz. The physical dimensions are approximately 1.43 inches in length and 0.41 inches in diameter, housed in a coaxial case suitable for versatile integration.

Feature Summary

• Provides effective signal filtering with low insertion loss characteristics
• Delivers high close-in rejection performance for noise suppression
• Features a compact coaxial design for easy integration into test setups

Applications

• RF signal conditioning in communication systems
• Test and measurement equipment setups
• Noise filtering in electronic circuits

Procurement Notes

Verify the specific datasheet version when ordering, as specifications such as cutoff frequency may vary between sources (e.g., 45 MHz vs 77 MHz). Confirm SMA connector compatibility and 50 Ohm impedance requirements match your system design. Ensure environmental ratings meet operational needs. Cross-reference part numbers carefully to avoid confusion with similar series components.

Selection Notes

Select this component for applications requiring a low-pass filter with SMA interfaces. Consider the typical 1.2 dB insertion loss and 50 dB rejection at 180 MHz for signal integrity. The compact coaxial form factor suits space-constrained designs. Verify average input power handling if high-power signals are present. Ensure the operating temperature range aligns with your environment.

Part Context

This component belongs to Mini-Circuits' VLF series of low-pass filters, which are known for their LTCC technology and robust construction. The series offers various cutoff frequencies to suit different RF applications. The VLF-45+ specifically targets lower frequency ranges, providing a balance between performance and size for general-purpose RF filtering tasks.

Replacement Considerations

Check for direct substitutes within the Mini-Circuits VLF series with matching cutoff frequencies. Verify that alternative components maintain the same SMA termination and 50 Ohm impedance. Ensure physical dimensions allow for replacement in existing enclosures without modification.