ACH4518-681-TD01

Overview

The ACH4518-681-TD01 is a surface-mount EMI filter circuit manufactured by TDK Corporation. It belongs to the ACH series and utilizes an LC (T) filter topology designed for signal line and DC power line applications. The component features a rated voltage of 50 V and a current rating of 2 A. It incorporates a capacitance value of 470 pF and achieves a cutoff frequency of 180 MHz. The device is housed in a compact 1812 (4532 metric) package with three PCB pads, suitable for automated SMD/SMT assembly processes.

Feature Summary

• Provides electromagnetic interference suppression for signal lines and DC power lines using LC (T) filter topology
• Designed for high-current applications with a 2 A current rating capability
• Utilizes a compact 1812 surface-mount package for efficient board space utilization

Applications

• Signal line filtering in electronic circuits
• DC power line noise suppression
• General purpose EMI mitigation in consumer electronics

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm RoHS compliance status and specific packaging requirements prior to order placement. Ensure storage conditions align with moisture sensitivity level specifications to maintain component integrity during assembly.

Selection Notes

Select this component when designing circuits requiring robust EMI filtering for both signal and power lines within a limited footprint. The 2 A current rating supports moderate power applications, while the 50 V rating suits low-voltage systems. Evaluate thermal performance and physical dimensions against PCB layout constraints before finalizing the design.

Part Context

This part is part of TDK's ACH series of EMI network filters. The series offers various capacitance values to tailor filtering characteristics for different frequency ranges. The ACH4518-681-TD01 specifically targets applications needing 470 pF capacitance with high current handling capabilities in a standard 1812 package format.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.