ACH4518-331-TD01

Overview

The ACH4518-331-TD01 is a TDK EMI filter circuit designed for signal and DC power lines. It utilizes an LC (T) topology with a capacitance of 330 pF, rated for 2 A current and 50 V voltage. The component operates within a temperature range of -40°C to +125°C. It features SMD/SMT termination in a 1812 (4532 metric) package with three PCB pads. This third-order low-pass filter provides attenuation of 25 dB at 450MHz ~ 550MHz.

Feature Summary

• Provides high-current EMI suppression for signal and DC power lines
• Utilizes LC (T) topology for stable ground circuits
• Offers excellent attenuation characteristics in a compact surface-mount form factor

Applications

• General purpose EMI filtering
• DC power line protection
• Signal line noise reduction

Procurement Notes

Verify availability status as this component may be discontinued or subject to supply constraints. Confirm RoHS compliance and environmental documentation before integration. Ensure the specific TD01 suffix matches design requirements. Check for recommended manufacturer substitutes if production continuity is required.

Selection Notes

Select based on the 2 A current rating and 50 V voltage limit. Ensure the 330 pF capacitance aligns with target frequency filtering needs. Verify compatibility with 1812 footprint and three-pad layout. Consider operating temperature range requirements for the specific application environment.

Part Context

Part of the TDK ACH series, which specializes in large current EMI filters. These components are engineered for high-current circuits where stable grounding is available. The series emphasizes achieving superior attenuation performance through its specific LC (T) network design.

Replacement Considerations

YFF18SC1H221MT0H0N is listed as a manufacturer-recommended substitute.