1812J1000393MJTE03

Overview

The Knowles Syfer 1812J1000393MJTE03 is a feed-through ceramic capacitor designed for surface mount technology. It features a capacitance of 0.039 µF with a voltage rating of 100 VDC and a tolerance of ±20%. The component utilizes a C0G/NP0 dielectric material, ensuring stable performance across an operating temperature range of -55°C to +125°C. Housed in a standard 1812 (4532 metric) package, it supports a maximum current of 50 mA. This device integrates filtering capabilities directly into the circuit layout.

Feature Summary

• Integrates feed-through filtering functionality within a standard surface-mount footprint
• Utilizes C0G/NP0 dielectric for high stability and low loss characteristics
• Supports continuous current handling up to 50 mA for power line applications

Applications

• High-frequency noise suppression on DC power lines
• EMI/RFI filtering in compact electronic assemblies
• Signal integrity protection in sensitive communication interfaces

Procurement Notes

Verify the specific JTE03 suffix configuration against the official datasheet to confirm terminal plating and internal structure. Ensure design compatibility with the 50 mA current rating and 100 VDC maximum voltage. Confirm that the 1812 footprint matches the target PCB layout dimensions. Cross-reference the manufacturer's latest documentation for any updates to environmental compliance or RoHS status prior to final procurement.

Selection Notes

Select this component when space-constrained designs require integrated filtering without additional discrete components. The 1812 package allows for higher current handling compared to smaller footprints. Verify that the C0G dielectric meets the required capacitance stability over temperature for the specific application environment. Ensure the 100 VDC rating provides sufficient margin for the operating voltage.

Part Context

This part belongs to the Knowles Syfer MLCC family, specifically engineered for high-reliability applications. The 1812J series denotes a standard 1812 case size with specific voltage and capacitance coding. As a feed-through capacitor, it differs from standard MLCCs by incorporating a conductive center pin, enabling direct connection through the board thickness for superior high-frequency attenuation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Consult the manufacturer's catalog for equivalent feed-through capacitors with matching 0.039 µF capacitance, 100 VDC rating, and 1812 footprint.