28F0121-0SR

Overview

The Laird-Signal Integrity Products 28F0121-0SR is a single-line power line ferrite bead designed for surface mount applications. It features a 2-SMD J-Lead 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 DC resistance (DCR) is maximized at 0.75 milliohms. It operates within a temperature range of -40°C to 125°C.

Feature Summary

• Provides high-current EMI suppression capability suitable for power lines
• Utilizes a compact 2-SMD J-Lead footprint for efficient board space utilization
• Maintains low DC resistance to minimize voltage drop in high-current paths

Applications

• Power supply input filtering
• High-current signal line noise suppression
• EMI reduction in automotive electronics

Procurement Notes

Verify the specific suffix requirements, as variants like 28F0121-0SR-10 exist with identical electrical characteristics but potentially different packaging or ordering codes. Confirm RoHS compliance status, as some listings indicate non-compliance. Check part status, as this model may be discontinued; ensure alternative sources or valid substitutes are available before finalizing procurement plans.

Selection Notes

Select this component when high current handling up to 10A is required alongside moderate impedance at 100 MHz. The J-Lead package offers mechanical stability for heavy components. Ensure the PCB layout accommodates the 3.05mm length and 3.05mm height. Compare against the 35F0121-0SR if lower impedance (42 ohms) is sufficient for the application.

Part Context

This ferrite bead belongs to the 28 series from Laird-Signal Integrity Products, specialized for power line filtering. It is distinct from the LI series, which targets lower current applications. The 28 series is characterized by its robust construction and ability to handle significant DC bias currents while maintaining effective high-frequency attenuation.

Replacement Considerations

The 35F0121-0SR is a comparable variant offering 42 ohms impedance at 100 MHz with similar physical dimensions and current ratings. Verify that the slight impedance difference meets the circuit's EMI suppression requirements before substitution.