Planars & Discoidals
Engineered for performance and flexibility, Knowles planar and discoidal capacitors provide reliable EMI filtering for the most demanding designs.
Contact Us With Your RequirementsAdvanced EMI Filtering with Planar and Discoidal Capacitors
Knowles planar arrays and discoidal capacitors are core building blocks in high‑reliability EMI filtering solutions. Designed for use in multi‑way EMI filter circuits, these components combine proven discoidal capacitor theory with Knowles’ advanced ceramic materials expertise to deliver exceptional electrical performance, mechanical precision, and long‑term reliability. Widely used in filter connectors and other demanding applications, Knowles planar and discoidal solutions support highly customized designs that meet stringent electrical and environmental requirements.
Key Highlights:
- Optimized for EMI filtering: Designed specifically for use in EMI filter circuits, offering excellent RF performance and high self‑resonant frequencies.
- Highly customizable designs: Whether complex shapes, mixed capacitance values within a single planar, or custom layouts tailored to connector and application requirements, we can meet your needs.
- Proven ceramic manufacturing expertise: Knowles' core wet manufacturing processes enable high mechanical precision and electrical accuracy for demanding specifications.
- Wide performance range: Available with stable X7R and ultra‑stable C0G/NP0 dielectrics, capacitance values from pF to µF, and high voltage capability.
- Built for critical applications: Extensive testing options and a history of use in high‑reliability environments, including space applications.
Planar Arrays
Knowles planar arrays are application‑specific, multilayer capacitor arrays used in high‑reliability EMI filtering solutions. Derived from proven discoidal capacitor theory, planar arrays provide precise capacitance control between the outer perimeter and internal through‑holes, making them ideal for filter connectors and other demanding EMI filter applications.
Key Highlights:
- Designed specifically for multi‑way EMI filter circuits and filter connector applications.
- Derived from discoidal capacitor technology for reliable, repeatable EMI performance.
- Highly customizable designs, including complex geometries, mixed capacitance values, and grounded or feed‑through lines.
- Manufactured using advanced ceramic processes to ensure electrical accuracy and mechanical precision.
- Proven reliability in demanding environments supported by rigorous testing options.
Planar Arrays
Discoidals
Knowles' multilayer feedthrough discoidal capacitors are designed to provide highly effective EMI filtering at the individual line level. Their geometry allows multiple low-inductance paths to ground, making them especially effective at attenuating high-frequency noise.
Discoidals are a foundational component in EMI feedthrough filters, offering superior performance compared to traditional tubular capacitor designs.
Key Highlights:
- Multilayer ceramic discoidal construction for superior electrical performance
- Extremely low ground path impedance, improving high-frequency attenuation
- Non‑polarized design suitable for AC and DC signals
- Compact form factor supporting space‑constrained designs
- High dielectric strength for reliable operation at elevated voltages
- Flexible dimensional options to support a wide range of package requirements
Discoidals
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