WLBD1005HCU121TH

Overview

The WLBD1005HCU121TH is a single-element ferrite chip bead manufactured by Walsin Technology Corporation, designed for surface mount technology (SMD/SMT) applications. It utilizes a 0402 (1005 metric) package with physical dimensions of 1 mm in length, 0.5 mm in width, and 0.5 mm in 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 1.5 A and features a maximum DC resistance of 150 mOhms. The device operates within a temperature range of -55°C to +125°C and includes flexible soft terminals.

Feature Summary

• Provides effective electromagnetic interference suppression through high impedance characteristics at 100 MHz.
• Features shielded construction to contain magnetic fields and minimize external interference.
• Utilizes flexible soft terminals to enhance mechanical reliability during soldering processes.

Applications

• Power line EMI suppression
• Signal integrity protection in compact electronic circuits
• High-frequency noise attenuation in mobile devices

Procurement Notes

Verify the specific suffix 'TH' against official Walsin documentation to confirm packaging details such as reel or cut tape specifications. Ensure that the requested quantity aligns with manufacturer minimum order requirements and standard factory pack sizes. Confirm RoHS compliance status directly from the latest datasheet revision before finalizing procurement orders.

Selection Notes

Select this component when space constraints require a 0402 footprint while maintaining significant current handling capabilities up to 1.5 A. The 120 Ohm impedance value is suitable for attenuating noise frequencies around 100 MHz. Consider the low DC resistance of 150 mOhms to minimize power loss and voltage drop in series configurations compared to higher impedance alternatives.

Part Context

This ferrite bead belongs to the WLBD series of high-current components from Walsin Technology Corporation. The series is engineered for robust performance in dense printed circuit board layouts. The HC designation typically indicates high-current capability relative to standard variants within the same physical package size, distinguishing it from lower current rated parts.

Replacement Considerations

WLBD1005HCU100TH: Offers 10 Ohms impedance and 2 A current rating. WLBD1005HCU331TL: Offers 330 Ohms impedance. Verify impedance matching and current ratings carefully when substituting to ensure circuit performance remains within design specifications.