1812J2000123MXTE03

Overview

The Knowles Syfer 1812J2000123MXTE03 is a feed-through multilayer ceramic capacitor (MLCC) designed for surface-mount technology. It features an X7R dielectric with a capacitance of 0.012 µF and a DC voltage rating of 200 VDC. The component operates within a temperature range of -55°C to +125°C and utilizes a 1812 (4532 metric) package size. It includes a built-in current limit of 50 mA, providing inherent protection against short circuits in high-frequency applications.

Feature Summary

• Integrates feed-through architecture with internal current limiting for enhanced circuit safety
• Utilizes X7R dielectric material for stable capacitance across wide temperature variations
• Supports surface-mount assembly via standard 1812 footprint dimensions

Applications

• High-frequency power supply filtering
• EMI suppression in sensitive electronic circuits
• Short-circuit protection in signal paths

Procurement Notes

Verify the specific suffix E03 against official datasheets to confirm packaging and termination specifications. Ensure compatibility with surface-mount reflow processes. Confirm that the 50 mA current limit meets the design requirements for the intended application environment.

Selection Notes

Select this component when both high-frequency filtering and intrinsic short-circuit protection are required in a compact form factor. The integrated current limiter distinguishes it from standard MLCCs, making it suitable for applications where fault tolerance is critical without adding discrete protective components.

Part Context

This part belongs to the Knowles Syfer XT series of high-reliability capacitors. The XT designation typically indicates specialized construction for demanding environments. As a feed-through device, it combines the functions of a capacitor and a fuse-like current limiter into a single passive component.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Replacement requires matching the 200V rating, 0.012µF capacitance, X7R dielectric, 1812 package, and specifically the 50mA current-limiting feature.