EZA-ST31AAAJ

Overview

The Panasonic EZA-ST31AAAJ is a surface-mount RC Pi-filter EMI filter designed for data line protection. It features four independent channels with a resistance of 100 ohms and capacitance of 22pF per channel. The component operates within a voltage rating of 25V and a temperature range of -25°C to +85°C. It utilizes a recessed 1608 (4021 metric) package measuring 4.00mm x 2.10mm x 0.85mm. This fourth-order low-pass network is intended for suppressing electromagnetic interference in mobile device data lines.

Feature Summary

• Provides multi-channel EMI suppression through integrated RC Pi-filter topology
• Designed specifically for protecting high-speed data lines in portable electronics
• Utilizes a compact recessed surface-mount footprint for space-constrained PCB layouts

Applications

• Mobile device data line filtering
• Portable electronic equipment signal integrity protection
• High-speed interface noise suppression

Procurement Notes

Verify the exact suffix AA against official Panasonic documentation, as variations may exist. Confirm current availability status as this series may be subject to discontinuation notices. Ensure compatibility with existing PCB footprints and reflow soldering profiles specified in the manufacturer's datasheet before integration into production designs.

Selection Notes

Select this component when designing circuits requiring simultaneous filtering of multiple differential or single-ended data lines within a limited board area. The 100-ohm resistance and 22pF capacitance values are optimized for specific impedance matching and cutoff frequency requirements typical in mobile communication interfaces. Verify that the 25V rating exceeds the operating voltage of the target application.

Part Context

This part belongs to the Panasonic EZA-ST series of chip RC networks. These components are engineered for EMI/RFI suppression in consumer electronics. The ST designation typically indicates a specific pin configuration and internal circuit topology distinct from other series like CT or NT. The product falls under the broader category of passive filters used for signal conditioning and noise reduction.

Replacement Considerations

Check for direct substitutes within the EZA-ST series with identical R and C values. Cross-reference with other manufacturers' 1608 package RC filters if Panasonic supply is unavailable. Ensure any replacement maintains the same channel count, package dimensions, and thermal characteristics.