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Product Detailed Parameters
- Description：MLC
- Series：EMI Filter
- Mfr：Knowles Syfer
- Package：Tape & Reel (TR)
- Voltage - Rated：50V
- Current：50 mA
- Operating Temperature：-55°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：1812 (4532 Metric), 3 PC Pad
- Size / Dimension：0.177" L x 0.126" W (4.50mm x 3.20mm)
- Capacitance：0.039 µF
- Tolerance：±20%
- DC Resistance (DCR) (Max)：-
- Insertion Loss：-
- Temperature Coefficient：X7R
- Ratings：-
- Height (Max)：0.030" (0.75mm)
- Thread Size：-
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Overview
The Knowles Syfer 1812Y0500393MJTE03 is a multilayer ceramic capacitor (MLCC) in an 1812 surface-mount package. It features a capacitance of 39 nF with a tolerance of ±20%. The device utilizes X7R dielectric material and has a DC voltage rating of 50 VDC. It incorporates FlexiCap/Nickel Barrier termination technology and is designed as an X2Y capacitor structure.
Feature Summary
- X2Y capacitor architecture providing integrated filtering capabilities
- FlexiCap/Nickel Barrier termination for enhanced mechanical reliability
- X7R dielectric material for stable performance across temperature ranges
Applications
- General purpose decoupling applications
- High reliability electronic circuits
- Automotive electronics requiring AEC-Q200 compliance
Procurement Notes
Verify the complete part number including suffixes to ensure correct termination and tolerance specifications. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Check current availability and lead times directly with authorized distributors or the manufacturer, as supply conditions may vary.
Selection Notes
Select this component when an X2Y topology is required for noise suppression in a compact 1812 footprint. The FlexiCap termination addresses board stress issues common in rigid terminations. Ensure the 50V rating and 39nF value align with circuit requirements. Verify that the ±20% tolerance meets design margins.
Part Context
This component belongs to the Knowles Syfer MLCC portfolio, specifically utilizing the X2Y design which integrates three terminals into a two-terminal package form factor. The 1812 case size offers a balance between capacitance density and physical space constraints in modern surface-mount assemblies.
Replacement Considerations
Direct substitutes must match the X2Y configuration, 1812 package, 50V rating, and 39nF value. Generic X7R MLCCs without X2Y topology are not functionally equivalent. Consult manufacturer cross-reference lists for verified alternatives.
