PH9408.494NLT

Common Mode Chokes Overview

The PH9408.494NLT is a surface-mount common mode choke from Pulse Electronics, designed for high-current applications. It features an inductance of 490 uH with a tolerance of 35%. The component supports a maximum DC current of 21 A and exhibits a low maximum DC resistance of 4 mOhms. Its self-resonant frequency is 1.3 MHz, providing effective filtering up to this limit. The device operates reliably within a temperature range of -40°C to +125°C. It utilizes a planar core structure suitable for PCB mounting.

Common Mode Chokes Feature Summary

• Planar core construction for compact surface-mount integration
• High current handling capability up to 21 A
• Low DC resistance for minimized power loss
• Automotive-grade reliability across extended temperature ranges

Common Mode Chokes Applications

• Industrial power supply input filtering
• Commercial server power distribution units
• Automotive electronics noise suppression
• High-density DC-DC converter stages

Common Mode Chokes Procurement Notes

Verify the specific inductance value against the datasheet, as distributor listings may contain conflicting data regarding the 490 uH specification. Confirm the package type matches the required footprint. Ensure the supplier provides official documentation to validate the 21 A current rating and 4 mOhm resistance parameters before finalizing procurement decisions.

Common Mode Chokes Selection Notes

Select this component when high current capacity and low profile are required for common mode noise reduction. The planar design facilitates automated assembly and reduces height constraints compared to toroidal alternatives. Evaluate the 1.3 MHz self-resonant frequency to ensure it aligns with the target noise spectrum. Consider the thermal performance at +125°C for robust operation in demanding environments.

Common Mode Chokes Part Context

This part belongs to the PH9408 series of surface-mount common mode chokes. The series is characterized by planar technology, offering consistent performance for high-current applications. It complements other components in the PH9407 and PH9408 families, which vary primarily in inductance values while maintaining similar physical dimensions and electrical characteristics.

Common Mode Chokes Replacement Considerations

Check the PH9408.644NLT for higher inductance requirements or the PH9408.814NLT for different impedance profiles. Verify that any substitute maintains the 21 A current rating and compatible footprint. Cross-reference the self-resonant frequency to ensure equivalent high-frequency attenuation capabilities.