ACMS201209A121

Overview

The ACMS201209A121 is a surface-mount ferrite bead from the Max Echo ACMS-2012 series, designed for EMI suppression in power line applications. It features an impedance of 120 Ohms at 100 MHz with a tolerance of ±25%. The component supports a maximum DC current of 3A and exhibits a low DC resistance of 50mOhm. Housed in an 0805 (2012 Metric) package, it operates within a temperature range of -55°C to +125°C.

Feature Summary

• Provides effective electromagnetic interference suppression for power lines
• Capable of handling high direct current loads up to 3A
• Constructed in a compact surface-mount footprint for space-constrained designs

Applications

• Power supply input filtering
• DC-DC converter output stages
• General-purpose EMI suppression in electronic circuits

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's latest datasheet to confirm impedance and tolerance specifications. Ensure the required operating temperature range aligns with the -55°C to +125°C rating. Confirm package dimensions match the 0805 standard before integration into the PCB layout.

Selection Notes

Select this component when a 120 Ohm impedance at 100 MHz is required for noise attenuation on power rails carrying up to 3A. The low DC resistance minimizes voltage drop and power loss. Consider the 0805 package size for available board space and thermal management requirements relative to the current rating.

Part Context

This part belongs to the Max Echo ACMS-2012 series of ferrite chip EMI suppressors. The series utilizes iron oxide materials to provide broadband noise absorption. The ACMS designation indicates the specific product line configuration within the manufacturer's portfolio for surface-mount applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with equivalent components by matching impedance curves, current ratings, and physical dimensions.