1812Y0500394MSTE03

Overview

The Knowles Syfer 1812Y0500394MSTE03 is a surface-mount multilayer ceramic capacitor (MLCC) featuring an X7R dielectric and a capacitance of 0.39 µF. It operates at a rated DC voltage of 50V with a ±20% tolerance. The component utilizes the FlexiCap technology with a nickel barrier, designed for enhanced mechanical reliability. It meets AEC-Q200 automotive qualification standards and is housed in a standard 1812 (4532 metric) package.

Feature Summary

• X2Y architecture providing integrated common-mode noise filtering capabilities
• FlexiCap construction with flexible terminations to withstand board flex stress
• Nickel barrier electrode structure ensuring robust solder joint integrity
• AEC-Q200 qualified for high-reliability automotive electronic applications

Applications

• Automotive infotainment system power distribution networks
• High-speed data interface signal line decoupling
• Engine control unit (ECU) circuit protection
• Advanced driver-assistance systems (ADAS) sensor modules

Procurement Notes

Verify the complete part number including the suffix to confirm the specific termination and packaging configuration. Ensure compatibility with automated pick-and-place equipment regarding the reel specifications. Confirm that the supplier provides traceability documentation required for automotive quality standards. Check for any recent product change notices affecting the manufacturing process or material composition.

Selection Notes

Select this component when space-constrained designs require combined decoupling and noise suppression functions. The X2Y topology reduces the need for separate ferrite beads or additional capacitors. Consider the FlexiCap feature if the assembly process involves significant PCB bending or thermal cycling stresses typical in automotive environments.

Part Context

This component belongs to the Knowles Syfer FlexiCap series, which specializes in high-reliability MLCCs for demanding environments. The 1812Y prefix indicates the 1812 case size family. The MSTE suffix denotes the specific terminal and barrier construction associated with the X2Y variant within this product line.

Replacement Considerations

Direct substitutes must match the X2Y topology and 1812 footprint. Verify that alternative components maintain the same AEC-Q200 qualification level. Ensure the replacement offers comparable capacitance stability over temperature and voltage coefficients.