28B0157-100

Overview

The Laird-Signal Integrity Products 28B0157-100 is a solid, free-hanging ferrite core designed for cable EMI suppression. It features a circular geometry with an inner diameter of 2.00mm (0.079 inches) and an outer diameter of 4.00mm (0.157 inches). The component has a length of 10.00mm (0.394 inches). It provides an impedance of 121 Ohms at 100MHz. The core is constructed from Material 28 and is RoHS3 compliant.

Feature Summary

• Solid construction eliminates the need for assembly hardware or splitting mechanisms.
• Free-hanging design allows for easy installation onto existing cables without disconnection.
• Material 28 composition provides specific high-frequency attenuation characteristics.

Applications

• Suppression of electromagnetic interference on single conductors passing through the core.
• Common-mode noise reduction on data and power cables in electronic assemblies.
• Retroactive filtering of cables in manufactured devices to meet EMC requirements.

Procurement Notes

Verify that the target cable diameter does not exceed the 2.00mm inner diameter specification to ensure proper fit. Confirm that the application environment does not require hermetic sealing, as this is a standard open-core component. Check for any specific mechanical constraints regarding the 10.00mm length and 4.00mm outer diameter in tight spaces. Ensure compliance with RoHS3 regulations if required by the end product standards.

Selection Notes

Select this component when a non-split, solid ferrite solution is preferred over snap-on types for permanent installations. Consider the 121 Ohm impedance at 100MHz to match the frequency spectrum of the noise being suppressed. Evaluate the physical dimensions against available clearance around the cable. Compare Material 28 performance against other materials if different frequency responses are needed.

Part Context

This part belongs to the 28B series of cable ferrites from Laird-Signal Integrity Products. It is categorized under passive filters and specifically as a cable ferrite core. The series offers various impedance values and material compositions to address different signal integrity challenges across multiple industries requiring EMI control.

Replacement Considerations

Direct substitutes must match the 2.00mm ID, 4.00mm OD, and 10.00mm length dimensions. Verify that alternative parts offer comparable 121 Ohm impedance at 100MHz. Ensure replacement components utilize compatible ferrite materials for similar frequency absorption profiles.

FAQ

Is the 28B0157-100 a split-core design?

No, it is a solid, one-piece ferrite core that requires the cable to be threaded through it during assembly.

What is the maximum cable diameter this core can accommodate?

The core has an inner diameter of 2.00mm (0.079 inches), so the cable diameter must be less than or equal to this value.

Does this component comply with RoHS standards?

Yes, the 28B0157-100 is RoHS3 compliant.