EZA-ST11AAAJ

Overview

The Panasonic EZA-ST11AAAJ is a surface-mount RC network designed for EMI/RFI suppression. It features four channels with a resistance of 22 Ohms and capacitance of 22 pF per channel. The device operates at a maximum voltage of 25V DC. It utilizes a 1608 (0603 metric) package with dimensions of 1.6 x 0.8 x 0.7 mm. The component functions as a fourth-order low-pass filter in a PI configuration, offering a resistance tolerance of ±5% and a capacitance tolerance ranging from -20% to +30%. This integrated solution consolidates discrete components into a compact form factor suitable for high-density PCB layouts.

Feature Summary

• Integrates four independent RC filter channels within a single surface-mount package
• Provides fourth-order low-pass filtering characteristics using a PI network topology
• Designed specifically for EMI and RFI suppression on data lines
• Offers a compact footprint to support high-density circuit board designs

Applications

• Data line protection in mobile devices
• EMI suppression for USB interfaces
• Signal integrity enhancement in high-speed digital circuits
• Noise filtering in portable electronic equipment

Procurement Notes

Verify the specific suffix codes against official Panasonic documentation to ensure correct electrical tolerances and packaging options. Confirm that the 1608 package dimensions align with your PCB land pattern requirements. Check for any RoHS compliance declarations or end-of-life notices directly from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when space constraints require integrating multiple filter stages into a single footprint. Ensure the 25V DC rating meets the operating voltage of the target circuit. Verify that the 22 Ohm resistance value provides the necessary impedance matching without degrading signal quality for the specific data rate being filtered.

Part Context

This part belongs to the Panasonic EZA series of RC networks, which are engineered for efficient noise reduction in compact electronics. The series offers various configurations to replace discrete resistor-capacitor assemblies, simplifying assembly processes and improving reliability by reducing solder joints and component count in sensitive signal paths.

Replacement Considerations

Consult official Panasonic substitution guides for verified alternatives. Generic equivalents may not match the precise capacitance tolerance or package height specifications required for strict EMI performance standards.

FAQ

What is the filter order of the EZA-ST11AAAJ?

It functions as a fourth-order low-pass filter due to its PI network configuration.

Does this component provide ESD protection?

No, it is an RC filter network and does not include built-in ESD protection structures.