1812J5000393MJTE03

Overview

The Knowles Syfer 1812J5000393MJTE03 is a feed-through capacitor designed for surface-mount applications. It features a capacitance of 0.039 µF with a voltage rating of 500 VDC and a current rating of 50 mA. The component utilizes an X7R dielectric material, providing stable performance across a temperature range of -55°C to +125°C. Housed in a compact 1812 (4532 metric) package, it integrates EMI filtering capabilities directly into the circuit layout.

Feature Summary

• Integrates feed-through functionality for effective electromagnetic interference suppression within a single surface-mount component.
• Utilizes X7R ceramic dielectric to maintain capacitance stability under varying thermal conditions.
• Supports high-voltage operation up to 500 VDC while managing continuous current loads of 50 mA.

Applications

• High-frequency noise suppression in power supply input stages
• Electromagnetic interference filtering in compact electronic assemblies
• Signal integrity protection in high-density printed circuit board designs

Procurement Notes

Verify the specific suffix MJTE03 against official manufacturer documentation to confirm terminal configuration and termination material specifications. Ensure compatibility with standard reflow soldering profiles defined for feed-through capacitors. Cross-reference the part number with authorized distributors to validate authenticity and traceability records prior to procurement.

Selection Notes

Select this component when space constraints require combined decoupling and filtering functions in a standard 1812 footprint. Evaluate the 50 mA current rating against peak operational loads to prevent thermal degradation. Confirm that the X7R temperature coefficient aligns with the environmental operating requirements of the target application system.

Part Context

This component belongs to the Knowles Syfer feed-through capacitor series, which merges passive filtering elements with surface-mount convenience. Unlike traditional discrete components, these units reduce board area by integrating the filter structure directly into the capacitor body, streamlining assembly processes for high-reliability electronics.

Replacement Considerations

No public confirmed substitute part numbers are available for this specific model.