About Knowles

Knowles Syfer is a specialty components manufacturer. The company chooses to take on the complex challenges of creating high-reliability, high-temperature, high-performance, and high-frequency solutions. This is built on the company’s commitment to innovation, whether in ongoing creativity in manufacturing high-performance multi-layer ceramic capacitors or Knowles Syfer’s unique ceramic formulations that allow us to provide the highest performance-for-footprint mmWave filters.


Knowles Products & Technologies


  • Hi-Q RF MLCCs
  • Thru-hole/SMT EMI suppression filters
  • RF/Microwave/ultra-low ESR
  • High voltage to 12 k VDC
  • 250 VAC ratings
  • SMDs
  • StackiCap™
  • SMD 3 A
  • SMD C
  • Pi filters
  • 20 A
  • X2Y® technology
  • Syfer AEC Q200


Knowles Product Applications


  • Medical implantable devices
  • Medical equipment
  • Military
  • Aerospace
  • EMI
  • Connector filtering
  • Oil exploration
  • Instrumentation
  • Industrial electronics
  • Optical networks
  • Telecom
  • Automotive
  • Radar
  • EW
  • 5G applications


Knowles Distributors


Knowles Syfer products, such as capacitors and filters, are available worldwide at any Knowles Syfer distributor. BD Electronics is one such distributor and is a group dedicated to bringing quality Knowles Syfer products and services to clients in any part of the globe.


FAQ About Knowles


Q1: Does Knowles manufacture MLCCs?

A: Our Multi-Layer Ceramic Capacitor (MLCC) product lines are available in standard surface mount, ribbon, and radial lead packages. SMD case sizes range from 0402 to 8060.


Q2: Does Knowles have single-layer capacitors?

A: Our single-layer capacitors support microwave and mmWave applications up to 100GHz and are widely used in support of general DC Blocking, Low Noise Amplifiers, Power Amplifiers, and High Power Amplifiers, Oscillators and Filters.


Q3: Does Knowles distribute trimmers?

A: Trimmers portfolio includes air, glass, sapphire, and PTFE dielectrics that can be used from 1 MHz to over 2 GHz and at voltages up to 20,000 VDC. Trimmers are available in precision Multi-Turn and Half/Single turn formats.


Q4: Is it possible to order Knowles SMD Capacitors online?

A: Yes, it is possible, and with the help of BD Electronics, a group that specializes in locating and delivering the highest quality products in the market, consumers are assured of purchasing only the highest quality tech equipment and components.

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