1806J0250404MXTE01

Overview

The Knowles Syfer 1806J0250404MXTE01 is a surface-mount multilayer ceramic capacitor (MLCC) designed as a three-terminal EMI filter. It features an X7R dielectric with a capacitance of 400 nF and a tolerance of ±20%. The component operates at a DC voltage rating of 25 VDC and utilizes a 1806 (4516 metric) package size. Terminal finishes consist of nickel barrier with 100% tin plating. It supports a standard operating temperature range from -55°C to +125°C.

Feature Summary

• Three-terminal architecture providing enhanced high-frequency noise attenuation compared to standard two-terminal designs.
• Integrated EMI filtering capability within the passive component structure for compact circuit board layouts.
• X7R dielectric material ensures stable capacitance performance across the specified industrial temperature range.

Applications

• High-frequency electromagnetic interference suppression in power supply input stages
• Signal line noise filtering in sensitive analog or digital circuits
• Common-mode noise reduction in data communication interfaces

Procurement Notes

Verify the specific terminal configuration and lead time requirements before ordering, as availability may vary by region. Confirm that the 1806 footprint matches the target PCB design constraints. Ensure the 25V DC rating aligns with the maximum circuit voltage including transients. Check RoHS compliance documentation if required for the final assembly process.

Selection Notes

Select this component when space-constrained EMI filtering is required without adding discrete inductors. The three-terminal design offers superior high-frequency performance over standard MLCCs. Consider the 400 nF value for bypassing applications where moderate energy storage and noise shunting are needed simultaneously. Evaluate the thermal stability provided by the X7R characteristic for environments with temperature fluctuations.

Part Context

This part belongs to the Knowles Syfer general-purpose MLCC series, specifically configured for EMI suppression. It differs from standard capacitors by incorporating internal shielding structures between terminals to minimize parasitic inductance. The 1806 case size balances current handling capacity with board space efficiency for mid-range filtering tasks.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data. Cross-referencing requires matching the 1806 footprint, 400 nF ±20% X7R specification, 25V rating, and three-terminal EMI filter topology from other manufacturers.