ACF451832-331-TLD01

Overview

The ACF451832-331-TLD01 is a third-order low-pass EMI filter from TDK's ACF series, designed for signal line protection. It utilizes an LC (T-type) circuit topology to suppress electromagnetic interference in high-speed data lines. The component features a compact 1812 (4532 metric) surface-mount package with dimensions of 4.5 x 3.2 x 1.8 mm. It supports a maximum DC voltage rating of 50 V and a current rating of 300 mA. The device operates within a temperature range starting at -25°C and offers effective filtering up to frequencies such as 100 MHz or 460 MHz depending on the specific variant configuration.

Feature Summary

• Third-order low-pass LC (T-type) circuit topology for enhanced noise suppression
• Compact 1812 surface-mount footprint suitable for space-constrained designs
• Optimized for signal line EMI/RFI filtering applications

Applications

• Signal line EMI filtering for mobile devices
• Data line protection in consumer electronics
• High-speed interface noise suppression

Procurement Notes

Verify the exact suffix (TD01 vs TLD01) against the manufacturer datasheet, as variations may indicate different tape-and-reel packaging or minor specification differences. Confirm availability status, as some variants are marked as obsolete or discontinued by major distributors. Ensure the selected part matches the required cutoff frequency and current handling capabilities for the specific application design.

Selection Notes

Select this component when a third-order low-pass response is required for signal integrity preservation. The 300 mA current rating and 50 V voltage limit define the operational boundaries. The 1812 package size dictates board space allocation. Verify that the target application does not exceed the thermal limits defined in the official specifications, particularly regarding the minimum operating temperature of -25°C.

Part Context

This component belongs to TDK's ACF series of EMI filters, which are engineered for suppressing noise in digital circuits. The ACF451832 designation indicates the physical package size (4532 metric), while the numerical suffix typically denotes the inductance/capacitance values determining the cutoff characteristics. These filters are integral to maintaining signal quality in modern electronic systems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users must consult TDK's official cross-reference tools or datasheets to identify compatible alternatives with matching electrical parameters and package dimensions.