ACH4518-220-TD01

Overview

The TDK ACH4518-220-TD01 is a surface-mount EMI filter circuit designed for signal and DC power lines. It utilizes an LC (T-Type) topology to provide third-order low-pass filtering characteristics. The component features a capacitance of 22 pF, a voltage rating of 50 V, and a current rating of 2 A. It is housed in a compact 1812 (4532 Metric) package with three pads. The device operates within a temperature range of -40°C to +125°C and offers attenuation of 25 dB at frequencies between 50 MHz and 130 MHz.

Feature Summary

• Provides third-order low-pass filtering using LC (T-Type) technology for effective noise suppression.
• Designed for high-current applications with a 2 A current rating on signal and DC power lines.
• Compact surface-mount construction in a 1812 package suitable for space-constrained designs.

Applications

• General-purpose EMI/RFI noise suppression
• Signal line filtering
• DC power line filtering

Procurement Notes

Verify the specific suffix TD01 against official TDK documentation to confirm packaging details such as reel or cut tape specifications. Confirm that the component status remains active or identify approved alternatives if the part is obsolete. Ensure compatibility with RoHS3 standards and check moisture sensitivity levels before procurement.

Selection Notes

Select this component when a third-order low-pass response is required for high-current signal or power lines. The 2 A rating supports substantial current loads while maintaining filtering performance. The 1812 footprint allows for integration into dense PCB layouts where standard through-hole filters are impractical.

Part Context

This component belongs to the TDK ACH series of large current EMI filters. These components are engineered to suppress electromagnetic interference in both signal and DC power paths. The series typically offers various capacitance values to tailor cutoff frequencies for specific application requirements while maintaining robust current handling capabilities.

Replacement Considerations

Officially recommended substitutes include YFF18SC1H472MT0H0N from TDK. Verify electrical equivalence and physical dimensions before substitution.