ACH4518-680-TD01

Overview

The ACH4518-680-TD01 is a third-order LC(T) EMI filter circuit manufactured by TDK Corporation. Designed for signal line and DC power line applications, this component features a cutoff frequency of 340 MHz and supports a maximum current rating of 2 A at a voltage rating of 50 V. It utilizes a surface-mount 1812 (4532 metric) package with three printed circuit board terminals. The device provides an insertion loss of 25 dB within the 290 MHz to 395 MHz frequency range. Operating temperatures are specified between -40°C and +125°C.

Feature Summary

• Third-order LC(T) topology for enhanced noise attenuation
• High current handling capability suitable for power lines
• Compact surface-mount design for space-constrained layouts

Applications

• Signal line filtering in electronic systems
• DC power line noise suppression
• General-purpose EMI/RFI mitigation

Procurement Notes

Verify component status as the ACH4518-680-TD01 is listed as obsolete or end-of-life by major distributors. Confirm availability through authorized channels or secondary markets. Ensure replacement parts meet identical electrical specifications and mechanical dimensions for seamless integration into existing designs.

Selection Notes

Select this component for applications requiring high-current EMI filtering on signal or DC lines. The 2 A rating and 340 MHz cutoff frequency define its operational limits. Consider the 1812 package size for PCB layout constraints. Verify thermal performance within the -40°C to +125°C operating range during system design.

Part Context

This part belongs to the TDK ACH series of EMI network filters. These components are engineered for suppressing electromagnetic interference in compact electronic devices. The series offers various capacitance values to tailor cutoff frequencies for specific noise profiles while maintaining consistent physical footprints for design flexibility.

Replacement Considerations

YFF18SC1H221MT0H0N is a manufacturer-recommended substitute.