PE-0402FB121ST

Overview

The PE-0402FB121ST is a surface-mount ferrite bead from Pulse Electronics, designed for EMI suppression in signal lines. It features a 0402 (1005 Metric) package with dimensions of 0.039" length and 0.020" width. The component provides an impedance of 120 Ohms at 100 MHz. It has a maximum DC resistance of 200 mOhm and a current rating of 550mA. The operating temperature range extends from -40°C to +105°C.

Feature Summary

• Multi-layer ferrite construction for effective high-frequency noise attenuation
• Compact 0402 footprint suitable for space-constrained PCB layouts
• Designed specifically for single signal line filtering applications

Applications

• High-speed digital signal line filtering
• EMI suppression in portable electronic devices
• Noise reduction in communication interface circuits

Procurement Notes

Verify the specific ordering suffix against official Pulse Electronics documentation to ensure correct packaging and tape specifications. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement. Ensure the selected variant matches the required impedance tolerance and current handling capabilities for the target application circuit.

Selection Notes

Select this component when a low-profile solution is required for signal integrity management. The 550mA current rating supports moderate signal loads without significant saturation. The 120 Ohm impedance at 100 MHz targets common RF interference frequencies. Verify that the 200 mOhm DCR does not introduce excessive voltage drop in the specific signal path design.

Part Context

This part belongs to the Pulse Electronics FB series of miniature ferrite beads. The series utilizes multi-layer technology to achieve high impedance in small packages. Similar parts in the family include variants with different impedance values and package sizes, such as the PE-0603PFB121ST or PE-0805FB121ST, offering flexibility for various board space constraints.

Replacement Considerations

Direct substitutes must match the 120 Ohm @ 100 MHz impedance, 0402 package size, and 550mA current rating. Verify pin compatibility and thermal characteristics. Cross-reference with other manufacturers' 0402 ferrite beads ensuring identical electrical performance curves for signal line filtering.