WLBD2012K2U400TP

Overview

The WLBD2012K2U400TP is a single-channel ferrite chip bead manufactured by Walsin Technology Corporation. It features a 2012 (0805) metric surface mount package with dimensions of 2.0 mm length, 1.25 mm width, and 1.0 mm height. The component provides an impedance of 40 Ohms at a test frequency of 100 MHz with a tolerance of ±25%. It supports a maximum DC current of 800 mA and has a maximum DC resistance of 50 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 enhance solder joint reliability during thermal cycling

Applications

• High-speed data line filtering in portable electronic devices
• Power supply noise suppression in compact circuit boards
• Signal integrity management in mobile communication modules

Procurement Notes

Verify the exact part number WLBD2012K2U400TP against official Walsin documentation to confirm impedance and current ratings. Ensure the supplier provides genuine components with traceable origin. Check for RoHS compliance status as indicated in manufacturer datasheets. Confirm packaging type matches production requirements. Validate terminal finish specifications for solderability compatibility.

Selection Notes

Select this component when a 40 Ohm impedance at 100 MHz is required for EMI suppression in space-constrained designs. The 800 mA current rating suits moderate power applications. The 2012 package offers a balance between footprint size and current handling capability compared to smaller or larger ferrite beads. Consider the 50 mOhms DC resistance impact on voltage drop in low-voltage circuits.

Part Context

This ferrite bead belongs to Walsin's WLBD series of passive components designed for signal conditioning and noise reduction. The series includes various impedance values and package sizes to support diverse electronic design needs. Ferrite beads function as frequency-dependent resistors, dissipating high-frequency noise energy as heat while allowing DC and low-frequency signals to pass with minimal attenuation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify electrical equivalence including impedance, current rating, and package dimensions before considering alternative manufacturers.