1812J0500393MJTE03

Overview

The Knowles Syfer 1812J0500393MJTE03 is a feed-through capacitor with a capacitance of 0.039 µF and a voltage rating of 50 VDC. It utilizes a C0G dielectric material, ensuring stable performance across the operating temperature range of -55°C to +125°C. The component features a 1812 (4532 metric) surface-mount package with a ±5% tolerance. Designed for high-reliability applications, it incorporates a nickel barrier termination system with 100% tin plating to enhance solderability and corrosion resistance.

Feature Summary

• Feed-through architecture providing integrated filtering capabilities within the component structure
• C0G/NP0 dielectric material offering minimal capacitance variation over temperature and voltage changes
• Nickel barrier termination technology ensuring robust solder joint integrity and environmental durability

Applications

• High-frequency signal line filtering in sensitive electronic circuits
• Power supply input/output decoupling requiring low parasitic inductance
• EMI suppression in compact surface-mount designs

Procurement Notes

Verify the specific part number suffix against official manufacturer documentation to confirm the feed-through configuration and termination specifications. Ensure compatibility with PCB pad layouts designed for feed-through components, which differ from standard MLCC footprints. Confirm RoHS compliance status through current datasheets before integration into regulated assemblies.

Selection Notes

Select this component when low parasitic inductance is critical for high-frequency noise attenuation. The feed-through design offers superior performance compared to standard parallel capacitors in EMI suppression scenarios. Evaluate the 1812 package dimensions against available board space constraints. Consider the 50V rating relative to peak circuit voltages to ensure adequate margin.

Part Context

This component belongs to the Knowles Syfer feed-through capacitor series, distinct from standard multilayer ceramic capacitors. While sharing the 1812 footprint, its internal structure integrates a conductive path through the dielectric, enabling simultaneous signal passage and filtering. This specialization targets applications demanding compact form factors with enhanced electromagnetic interference rejection capabilities.

Replacement Considerations

Direct substitutes must match the feed-through topology and 1812 footprint. Standard MLCCs like 1812J0500393KXT lack the internal conductive path and cannot replicate the filtering characteristics. Verify equivalent capacitance, voltage rating, and termination materials before substitution.