CM4440Z121R-10

Overview

The CM4440Z121R-10 is a broadband common mode choke from Laird-Signal Integrity Products, designed for high-current power line filtering. It features three independent channels (3Ck) in a surface-mount 4440 package with vertical orientation and six flat leads. Key electrical specifications include an impedance of 120 Ohms at 100 MHz, a maximum DC resistance (DCR) of 1 milliohm, and a current rating of 20 Amperes. The component supports a DC voltage rating of 100V, ensuring reliable performance in demanding power electronics applications requiring effective electromagnetic interference suppression.

Feature Summary

• Provides broadband common mode noise filtering for power lines
• Supports high current operation up to 20A with low insertion loss
• Utilizes a compact surface-mount form factor for space-constrained designs

Applications

• Power line filtering in industrial equipment
• Electromagnetic interference suppression in motor control systems
• Noise reduction in data infrastructure power supplies

Procurement Notes

Verify the manufacturer designation, as some listings reference Qnity while official datasheets identify Laird-Signal Integrity Products. Confirm the specific impedance value of 120 Ohms at 100 MHz and the 20A current rating against your design requirements. Ensure compatibility with the vertical 6-flat-lead package style. Cross-reference the part number suffix to confirm it matches the standard broadband configuration without unique functional alterations.

Selection Notes

Select this component when high current handling is required alongside effective common mode noise attenuation. The low DC resistance minimizes power loss in high-amperage circuits. The 120 Ohm impedance provides sufficient filtering for broadband interference without excessive signal degradation. Consider the physical dimensions of the 4440 package to ensure adequate board space and thermal management capabilities for the intended application environment.

Part Context

This component belongs to the CM4440 series of high-current common mode chokes. The series is engineered to offer small form factors with high performance for economical power filtering. These devices are specifically optimized for suppressing common mode noise in applications where significant current flows through the filtered lines, balancing size constraints with robust electromagnetic compatibility requirements.

Replacement Considerations

Consult official Laird documentation for direct cross-references. Verify that any substitute maintains the 3-channel configuration, 120 Ohm impedance at 100 MHz, and 20A current rating. Ensure the replacement package matches the vertical 6-flat-lead footprint to guarantee mechanical compatibility.