ACH4518-682-TD01

Overview

The ACH4518-682-TD01 is a surface-mount EMI filter circuit manufactured by TDK Corporation. It utilizes an LC (T-type) topology designed for signal line and DC power line applications. The component features a capacitance of 6800 pF, a voltage rating of 50 V, and a current rating of 2 A. It operates within a frequency range of 20 MHz to 90 MHz with a cutoff frequency of 35 MHz. The device is housed in a 1812 (4532 metric) package with dimensions of 4.5 mm x 3.2 mm x 1.8 mm.

Feature Summary

• Provides third-order low-pass filtering characteristics for effective noise suppression.
• Designed for high-current applications with a 2 A rated current capacity.
• Compact surface-mount construction suitable for space-constrained PCB layouts.

Applications

• Signal line EMI filtering
• DC power line filtering
• General-purpose electronic equipment noise reduction

Procurement Notes

This component is identified as obsolete or end-of-life across multiple distributor records. Verification of availability through official TDK channels or authorized distributors is essential before integration into new designs. Engineers should confirm the final status via manufacturer notifications or product change notices to avoid supply chain disruptions during production phases.

Selection Notes

Select this part when a 2 A current rating and 50 V voltage limit are required for EMI suppression. The 1812 footprint dictates board space allocation. Ensure the application frequency aligns with the 35 MHz cutoff and 20-90 MHz operational range. Verify that the LC (T-type) impedance profile matches the source and load requirements for optimal attenuation performance.

Part Context

The ACH4518 series represents TDK's line of large current EMI filters. These components are engineered to handle significant current loads while maintaining compact physical profiles. The specific model falls under the broader category of EMI network filters, serving as a critical passive element for electromagnetic compatibility in modern electronic systems.

Replacement Considerations

Public documentation indicates YFF18SC1H472MT0H0N as a recommended substitute from TDK. Verify electrical parameter compatibility and mechanical fit before substitution.

FAQ

What is the maximum current rating for the ACH4518-682-TD01?

The component has a rated current capacity of 2 A.

Does this filter provide ESD protection?

No, the specifications indicate that ESD protection is not included in this component.