28F0121-1SR

Overview

The 28F0121-1SR is a surface-mount ferrite bead from the Laird 28 series, designed for power line EMI filtering. It features a J-lead 2-SMD package with dimensions of 3.05mm x 2.54mm and a maximum height of 3.05mm. The component provides an impedance of 48 ohms at 100 MHz and supports a maximum rated current of 10A. Its maximum DC resistance is 0.75 milliohms. It operates within a temperature range of -40°C to 125°C.

Feature Summary

• J-lead surface mount configuration for secure PCB attachment
• High current handling capability suitable for power lines
• Solid ferrite material construction for broadband noise suppression

Applications

• Power supply input filtering
• DC-DC converter output stages
• General power line EMI suppression

Procurement Notes

Verify the specific suffix against official datasheets, as variations may exist. Confirm RoHS compliance status, as some sources indicate non-compliance for this part number. Check lead time requirements due to potential manufacturing delays. Ensure the J-lead footprint matches the target PCB design. Validate that the 10A rating meets the application's peak current demands.

Selection Notes

Select this component when high current capacity is required alongside moderate impedance values. The J-lead package offers mechanical stability compared to standard terminations. Consider the 48-ohm impedance profile for specific frequency attenuation needs. Evaluate the physical size constraints against available board space. Compare thermal performance under continuous load conditions.

Part Context

This component belongs to the Laird 28 series of solid ferrite beads. These parts are engineered for robust signal integrity in noisy environments. The series typically utilizes high-permeability ferrite materials. They are distinct from chip-style beads by their larger form factor and higher current ratings.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.