EMI-1812-125

Chip Ferrite Bead Overview

The Delevan EMI-1812-125 is a surface-mount ferrite bead designed for electromagnetic interference suppression in high-frequency circuits. It features a 1812 (4532 metric) package with standard SMD/SMT termination. The component exhibits an impedance of 120 Ohms at 100 MHz and a maximum DC resistance of 400 mOhms. It supports a maximum DC current of 200 mA and operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides effective attenuation of high-frequency noise signals through ferrite material properties
• Designed for direct surface-mount integration onto printed circuit boards
• Constructed to maintain electrical stability across wide industrial temperature variations

Chip Ferrite Bead Applications

• High-speed digital signal line filtering
• Power supply output noise suppression
• RF circuit interference mitigation

Chip Ferrite Bead Procurement Notes

Verify the specific manufacturer designation, as API Delevan components may be sourced under various corporate identifiers. Confirm RoHS compliance status directly with the supplier, as historical data indicates potential non-compliance for certain batches. Ensure the ordering quantity aligns with reel or cut-tape requirements specified by the distributor. Cross-reference the part number against the latest datasheet to confirm physical dimensions and electrical characteristics match the design specifications.

Chip Ferrite Bead Selection Notes

Select this component when a compact form factor is required for noise suppression in space-constrained designs. The 1812 package offers a balance between current handling capability and footprint size. Consider the 120 Ohm impedance value relative to the target noise frequency spectrum to ensure adequate attenuation. Evaluate the 200 mA current rating against the maximum operating current of the protected circuit to prevent saturation or excessive heating during normal operation.

Chip Ferrite Bead Part Context

This ferrite bead belongs to the EMI1812 series from API Delevan, a line of passive components focused on electromagnetic compatibility. The series utilizes specialized ferrite formulations optimized for broadband noise absorption. These components are integral to maintaining signal integrity in modern electronic systems where high-frequency disturbances must be isolated from sensitive circuitry.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify mechanical compatibility and electrical equivalence with alternative suppliers before substitution.