WLBD1005K2U121TP

Overview

The WLBD1005K2U121TP is a single-channel ferrite chip bead manufactured by Walsin Technology Corporation. It features a 0402 (1005 metric) surface-mount package with dimensions of 1 mm length, 0.5 mm width, and 0.5 mm height. 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 300 mA and has a maximum DC resistance of 400 mOhms. The device operates within a temperature range of -55°C to +125°C and utilizes flexible soft terminals for SMD/SMT mounting.

Feature Summary

• Provides electromagnetic interference suppression through high-impedance characteristics at specific frequencies
• Utilizes shielded construction to contain magnetic fields and reduce external noise coupling
• Features flexible soft terminals designed to withstand mechanical stress during surface-mount assembly processes

Applications

• High-speed data line filtering in portable electronic devices
• Power supply noise suppression on printed circuit boards
• Signal integrity enhancement in compact consumer electronics

Procurement Notes

Verify the complete part number including suffixes against official manufacturer documentation to ensure correct impedance and current ratings. Confirm RoHS compliance status and specific packaging options such as cut tape or reel quantities directly with authorized distributors. Cross-reference datasheet parameters like DC resistance and operating temperature ranges to validate suitability for the intended application environment before finalizing procurement orders.

Selection Notes

Select this component when space constraints require a 0402 footprint and moderate current handling up to 300 mA is sufficient. Ensure the target frequency band aligns with the 120 Ohm impedance specification measured at 100 MHz. Evaluate the maximum DC resistance impact on signal loss or voltage drop within the specific circuit design requirements prior to integration into the final product architecture.

Part Context

This ferrite bead belongs to the WLBD series from Walsin Technology Corporation, which offers various impedance values and current ratings within standard metric packages. The K2 designation typically indicates specific material properties optimized for broadband noise absorption. This series supports miniaturization trends in modern electronics by providing effective EMI control in small form factors suitable for dense board layouts.

Replacement Considerations

Consult official substitution guides for equivalent ferrite beads with matching 120 Ohm impedance at 100 MHz and compatible 300 mA current ratings. Verify that alternative components maintain the same 0402 package dimensions and terminal configurations to ensure physical compatibility without requiring PCB layout modifications.