1812Y0500404MJTE03

Overview

The Knowles Syfer 1812Y0500404MJTE03 is a feedthrough capacitor featuring X7R dielectric with 0.4 µF capacitance and ±20% tolerance. Rated for 50 VDC, it operates within -55°C to +125°C. The component utilizes a 1812 (4532 metric) surface-mount package with three terminals. It incorporates FlexiCap technology and a nickel barrier termination system.

Feature Summary

• X2Y architecture providing integrated common-mode and differential-mode noise suppression
• FlexiCap construction designed to enhance mechanical reliability against board flexing
• Nickel barrier termination structure ensuring robust solder joint integrity

Applications

• Automotive electronics requiring AEC-Q200 compliance
• High-density circuit boards needing combined filtering and decoupling
• Noise-sensitive signal lines in compact electronic modules

Procurement Notes

Verify the complete part number including suffixes to confirm specific packaging and termination variants. Confirm RoHS and REACH compliance status through official manufacturer documentation prior to integration. Ensure design compatibility with the specified thermal operating range and voltage derating requirements for long-term reliability.

Selection Notes

Select this component when space constraints require a single device to perform both differential and common-mode filtering functions. The X2Y topology offers superior high-frequency performance compared to discrete capacitor networks. Verify that the 50V rating aligns with peak circuit voltages and that the 1812 footprint fits the available PCB real estate.

Part Context

This component belongs to the Knowles Syfer X2Y family of feedthrough capacitors. These devices integrate multiple internal connections to provide multi-port filtering capabilities within a standard surface-mount form factor. The series is engineered for applications demanding high reliability and significant noise reduction in minimal spaces.

Replacement Considerations

Direct substitutes must match the X2Y topology, 0.4 µF value, 50V rating, and 1812 package dimensions. Verify terminal configuration and termination material compatibility. Generic MLCCs cannot replicate the integrated filtering function without additional discrete components.