ACF451832-681-TD01

Overview

The TDK ACF451832-681-TD01 is a signal line EMI filter circuit designed for surface mount applications. It operates within a voltage rating of 50 V and supports a current rating of 300 mA. The component utilizes an LC (T) filter topology with a cutoff frequency of 100 MHz. It is housed in an 1812 (4532 metric) package with SMD/SMT termination types. The device functions reliably across a temperature range from -25°C to 85°C.

Feature Summary

• Combines electrostatic discharge protection and noise suppression into a single component
• Provides sharp attenuation characteristics with excellent EMC performance

Applications

• Signal line EMI filtering
• Electromagnetic interference suppression
• Radio frequency noise reduction

Procurement Notes

Verify the current lifecycle status, as sources indicate this specific part number may be discontinued or subject to last-time buy restrictions. Confirm availability through authorized distributors, noting that some regions may have limited stock. Ensure compatibility with existing PCB footprints and thermal requirements before finalizing procurement decisions.

Selection Notes

Select this component when integrating ESD protection and EMI filtering into space-constrained designs requiring an 1812 footprint. Consider its 300 mA current handling and 50 V rating against circuit demands. Evaluate the 100 MHz cutoff frequency to ensure it meets specific signal integrity and noise suppression requirements for the target application environment.

Part Context

This component belongs to the TDK ACF series of EMI/RFI filters. These devices are engineered to address electromagnetic compatibility challenges in compact electronic systems. The series offers various capacitance values tailored for different signal line applications, providing a standardized solution for noise mitigation in modern electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify if other variants within the ACF451832 series meet specific design requirements, but confirm electrical compatibility independently.