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Product Detailed Parameters
- Description：MLC
- Series：EMI Filter
- Mfr：Knowles Syfer
- Package：Tape & Reel (TR)
- Voltage - Rated：500V
- 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 1812Y5000393MJTE03 is a feed-through multilayer ceramic capacitor (MLCC) in an 1812 surface-mount package. It features a capacitance of 0.039 µF with a DC voltage rating of 500 VDC and X7R dielectric. The component supports a continuous current of 50 mA and utilizes FlexiCap technology with nickel barrier terminals for enhanced reliability.
Feature Summary
- Integrated feed-through architecture providing internal shielding and EMI suppression
- FlexiCap flexible terminal design to mitigate board flex stress
- Nickel barrier electrode structure for improved solderability and corrosion resistance
Applications
- High-frequency noise filtering in sensitive electronic circuits
- EMI suppression in automotive electronics
- Power supply input/output decoupling
Procurement Notes
Verify the specific suffix 'MJTE03' against official datasheets to confirm the feed-through configuration and current rating. Standard MLCCs share similar part numbers but lack the internal conductor and shielding properties. Confirm RoHS compliance status directly from the manufacturer's documentation before integration.
Selection Notes
Select this component when both high-voltage handling and significant EMI attenuation are required in a compact footprint. The feed-through design offers superior noise rejection compared to standard parallel-plate capacitors. Ensure the circuit layout accommodates the specific pad geometry required for the central conductor connection.
Part Context
This component belongs to the Knowles Syfer FlexiCap series, which specializes in high-reliability capacitors for demanding environments. The 1812Y prefix indicates the 1812 case size and 500V rating class. The product combines standard MLCC manufacturing with specialized internal structures for signal integrity applications.
Replacement Considerations
Publicly confirmed substitute: 1812Y5000393KXT. Note that the KXT variant is a standard MLCC without the feed-through structure; verify if EMI performance requirements can be met by the standard version.
