74279224251

Overview

The Würth Elektronik 74279224251 is an EMI multilayer power suppression ferrite bead from the WE-MPSB series. It features a 2220 [5550 Metric] surface-mount package with dimensions of 5.7 mm length, 2.0 mm width, and 2.0 mm height. The component provides an impedance of 250 Ohms at a test frequency of 100 MHz and supports a maximum DC current rating of 4 A. It exhibits a maximum DC resistance (RDC) of 3 mOhms and operates within a temperature range of -55°C to +125°C. This part is qualified under AEC-Q200 standards for automotive applications.

Feature Summary

• High-performance SMD ferrite design offering up to 40% higher rated current load compared to standard equivalents.
• Drastically reduced DC resistance (RDC) to minimize power loss in high-current power lines.
• Multilayer construction optimized for effective EMI suppression in compact board spaces.

Applications

• Automotive electronic systems requiring AEC-Q200 qualified components
• Power line filtering in high-current circuits
• EMI suppression in mobile devices and consumer electronics

Procurement Notes

Verify the specific manufacturer datasheet for the 74279224251 to confirm the exact maximum DC resistance value, as source data indicates 3 mOhms while general series descriptions may vary. Ensure the procurement specification matches the required 2220 package size and 4 A current rating. Confirm AEC-Q200 qualification status if the application mandates automotive-grade reliability standards before finalizing orders.

Selection Notes

Select this component when designing power stages that demand significant current handling capability alongside effective high-frequency noise attenuation. The low RDC characteristic makes it suitable for sensitive power rails where voltage drop must be minimized. Consider the 2220 footprint availability and thermal management requirements during PCB layout to ensure optimal performance under continuous 4 A load conditions.

Part Context

This component belongs to the WE-MPSB series, which specializes in multilayer power suppression beads. Unlike standard ferrite beads, the WE-MPSB series is engineered specifically for power lines, balancing high current capacity with substantial impedance. It serves as a critical passive element for maintaining signal integrity and reducing electromagnetic interference in dense electronic assemblies.

Replacement Considerations

Direct substitutes within the same series include other WE-MPSB variants with different impedance values but identical 2220 footprints and current ratings. Verify that any replacement maintains the 4 A current rating and compatible RDC specifications to avoid circuit performance degradation or thermal issues in the existing design.

FAQ

What is the maximum DC current rating for the 74279224251?

The maximum DC current rating is 4 A, allowing it to handle significant power loads without saturation.

Does this component meet automotive reliability standards?

Yes, the 74279224251 is qualified according to the AEC-Q200 standard for passive components.

What is the impedance value at the test frequency?

The impedance is 250 Ohms at a test frequency of 100 MHz.