DR334A-105BE

Common Mode Chokes Overview

The Bourns DR334A-105BE is a surface-mount common mode choke from the DR334A series, designed for EMI suppression in data and power lines. It features a toroidal ferrite core with bifilar windings, providing self-shielding and low radiation characteristics. The component offers an inductance of 1 mH (1000 µH) at 100 kHz with a tolerance of ±25%. It supports a maximum DC current of 500 mA and has a maximum DC resistance of 400 mΩ. Rated for voltages up to 80 V DC, it operates within a temperature range of -40°C to +135°C. The package dimensions are 9 mm x 5.8 mm x 3.6 mm.

Common Mode Chokes Feature Summary

• Toroidal core construction provides self-shielding properties and minimizes electromagnetic radiation.
• Bifilar winding design ensures wide EMI suppression frequency range effectiveness.
• Compliant with AEC-Q200 automotive qualification standards for reliability.

Common Mode Chokes Applications

• EMI filtering in automotive electronic systems
• Common mode noise suppression in high-speed data lines
• Power line filtering in compact surface-mount assemblies

Common Mode Chokes Procurement Notes

Verify the specific part number suffix against the manufacturer's latest datasheet to confirm pinout and packaging configuration. Ensure that the selected variant meets the required AEC-Q200 qualification if used in automotive applications. Cross-reference impedance values at target frequencies during final design validation.

Common Mode Chokes Selection Notes

Select this component when space-constrained designs require self-shielding chokes with high common mode impedance. The 500 mA rating suits low-power signal and data line protection. Verify that the 1 mH inductance aligns with the specific noise frequency spectrum requiring attenuation in the target circuit topology.

Common Mode Chokes Part Context

This component belongs to the Bourns DR334A series of surface-mount common mode chokes. The series is characterized by its compact toroidal geometry and compliance with automotive reliability standards. It serves as a specialized solution for suppressing electromagnetic interference in dense PCB layouts where magnetic coupling between adjacent components must be minimized.

Common Mode Chokes Replacement Considerations

Direct substitutes include other AEC-Q200 qualified SMD common mode chokes with similar 1 mH inductance and 500 mA current ratings. Verify mechanical footprint compatibility (9x5.8x3.6 mm) and electrical parameters such as DC resistance and impedance curves before substitution.