1812J2000123MJTE03

Overview

The Knowles Syfer 1812J2000123MJTE03 is a feed-through multilayer ceramic capacitor (MLCC) designed for surface-mount technology. It features a capacitance of 0.012 µF with a voltage rating of 200 VDC and a tolerance of ±20%. The component utilizes an X7R dielectric material and operates within a temperature range of -55°C to +125°C. Housed in an 1812 (4532 metric) package, it integrates a built-in current-limiting resistor rated at 50 mA. This design provides effective electromagnetic interference suppression while maintaining compact board space requirements.

Feature Summary

• Integrates a current-limiting resistor directly into the capacitor structure for combined filtering and protection
• Provides high-frequency electromagnetic interference suppression through feed-through architecture
• Utilizes X7R dielectric material for stable performance across specified operating temperatures

Applications

• Electromagnetic interference filtering in compact electronic assemblies
• Power line conditioning where current limiting and noise suppression are required
• Signal integrity management in high-density circuit boards

Procurement Notes

Verify the specific suffix JTE03 against official datasheets to confirm the integrated resistor value and current limit specifications. Ensure compatibility with automated pick-and-place equipment due to the unique feed-through terminal configuration. Confirm RoHS compliance status through manufacturer documentation prior to integration.

Selection Notes

Select this component when simultaneous capacitive filtering and resistive current limiting are necessary in a single footprint. Compare against discrete RC networks to evaluate space savings and assembly efficiency. Validate that the 50 mA internal resistance meets the circuit's surge protection requirements without affecting normal operation.

Part Context

This part belongs to the Knowles Syfer feed-through capacitor series, which combines MLCC technology with resistive elements. Unlike standard capacitors, these components offer enhanced EMI/RFI attenuation by dissipating high-frequency noise energy as heat through the integrated resistor, making them suitable for sensitive analog and digital circuits.

Replacement Considerations

Direct substitutes must match the 0.012 µF capacitance, 200 V rating, and 50 mA current limit. Verify terminal geometry compatibility for surface mount installation. Generic MLCCs cannot replace this function due to the absence of the integrated resistive element.