ACH4518-101-TD01

Overview

The ACH4518-101-TD01 is a third-order LC(T) low-pass EMI filter circuit manufactured by TDK Corporation. Designed for signal line and DC power line applications, this component operates with a maximum current rating of 2A and a voltage rating of 50V. It utilizes an SMD/SMT termination type within a 1812 (4532 metric) package, measuring 4.5mm in length, 3.2mm in width, and 1.8mm in height. The device provides significant attenuation, specifically 25dB at frequencies between 450MHz and 550MHz, ensuring effective noise suppression in compact electronic designs.

Feature Summary

• Third-order LC(T) topology for enhanced high-frequency noise rejection
• Compact surface-mount design suitable for space-constrained PCB layouts
• Capable of handling high continuous current loads up to 2A

Applications

• Signal line filtering in automotive electronics
• DC power line noise suppression
• General-purpose EMI/RFI mitigation in consumer electronics

Procurement Notes

Verify the specific suffix TD01 against the manufacturer's latest documentation to confirm packaging details and compliance status. As this component may be subject to lifecycle changes, check for active obsolescence notices or product change notifications from TDK before finalizing procurement plans.

Selection Notes

Select this component when a third-order filter response is required for both signal and power lines within a 1812 footprint. Ensure the application environment stays within the specified operating temperature range and that the 2A current rating exceeds the maximum expected load current to maintain reliability.

Part Context

This part belongs to the TDK ACH series of large current EMI filters. These components are engineered to provide robust electromagnetic interference suppression while maintaining a small physical profile. The series is commonly utilized in applications requiring efficient noise filtering without significantly increasing board space or assembly complexity.

Replacement Considerations

For discontinued units, consider the YFF18SC1H221MT0H0N as a manufacturer-recommended substitute. Verify electrical compatibility and mechanical fit before implementation.