2518121217Y3

Overview

The Fair-Rite Products Corp. part number 2518121217Y3 is a multilayer ferrite chip bead designed for surface-mount technology applications. It operates within the 25 series and utilizes an 1812 (4532 metric) package format. The component provides an impedance of 120 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 3 A and maintains a maximum DC resistance of 40 mOhms. The device functions reliably across a temperature range from -55°C to +125°C.

Feature Summary

• Multilayer construction for compact surface-mount integration
• High current handling capability suitable for power line filtering
• Low DC resistance to minimize signal attenuation
• Wide operating temperature range for diverse environmental conditions

Applications

• Power supply output filtering
• Battery charger circuit protection
• Portable electronic device noise suppression
• Energy-efficient system signal integrity maintenance

Procurement Notes

Verify the specific ordering suffix Y3 against the manufacturer's official datasheet to confirm material composition and impedance characteristics. Ensure the selected package matches the required 1812 footprint for PCB layout compatibility. Confirm RoHS compliance status if restricted substances are mandated by the end product regulations. Cross-reference the impedance value at 100 MHz with the design requirements to ensure adequate high-frequency attenuation performance.

Selection Notes

Select this component when a surface-mount ferrite bead is required for high-current applications up to 3 A. The 120 Ohm impedance at 100 MHz makes it suitable for suppressing electromagnetic interference in power lines. Consider the 1812 package size for board space constraints. Verify that the low DC resistance of 40 mOhms meets the voltage drop limitations of the specific circuit design. Ensure the operating temperature range covers the intended environment.

Part Context

This component belongs to the Fair-Rite 25 series of multilayer ferrite chip beads. These components are engineered for SMD/SMT assembly, offering a compact alternative to traditional through-hole ferrites. The 25 series is widely used in consumer electronics and industrial equipment for EMI suppression. The part integrates ferrite material within a ceramic structure to provide stable impedance characteristics over a broad frequency spectrum.

Replacement Considerations

Publicly confirmed substitute part numbers for 2518121217Y3 were not identified in the provided documentation. Verify compatibility with other 1812 package ferrite beads having similar 120 Ohm impedance and 3 A current ratings before substitution.