ACF321825-331-TD01

Overview

The ACF321825-331-TD01 is a third-order low-pass LC(T) EMI filter manufactured by TDK Corporation. Designed for signal line applications, it integrates ferrite chip beads and multilayer ceramic capacitors into a vertically mounted surface-mount package. The component operates within a temperature range of -25°C to 85°C and supports a rated voltage of 20V with a current capacity of 300 mA. It provides attenuation of 25dB at frequencies between 37MHz and 90MHz. The physical dimensions are 3.20mm x 2.50mm x 2.00mm (1210 metric), featuring a channel resistance of 0.15 ohms.

Feature Summary

• Integrates ferrite chip beads and multilayer ceramic chip capacitors for effective EMC suppression
• Vertical mounting structure optimizes space efficiency for high-density circuit designs
• Capable of handling 300 mA current in data line applications

Applications

• Signal line filtering in mobile devices
• EMI suppression on data lines requiring common mode noise reduction
• High-density circuit board layouts where vertical footprint is required

Procurement Notes

Verify component authenticity through authorized TDK distributors or certified suppliers. Confirm RoHS3 compliance status prior to integration. Check for Product Change Notifications (PCN) regarding manufacturing updates. Ensure storage conditions maintain moisture sensitivity level 1 integrity. Validate pin compatibility with existing PCB footprints before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring compact EMI filtering for data lines with moderate current requirements up to 300 mA. The vertical form factor suits applications with strict height constraints. Ensure the target frequency range aligns with the specified attenuation characteristics. Verify that the 20V rating meets the system's operational voltage limits.

Part Context

This part belongs to the TDK ACF series, which specializes in combining passive components for enhanced electromagnetic compatibility. The series is engineered for modern electronics demanding small footprints and reliable noise suppression. It represents a solution for integrating filtering capabilities directly into signal paths without occupying excessive board area.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult TDK technical support for verified alternatives if this specific model is discontinued or unavailable.