Knowles/Cornell Dubilier is a technology leader specializing in advanced micro-acoustic microphones, balanced armature speakers, audio solutions, high-performance capacitors, and RF products. With a focus on customer needs and innovative technology, the company serves diverse markets, including consumer electronics, medtech, defense, electric vehicles, industrial, and communications. Founded in 1946 and headquartered in Itasca, Illinois, Knowles invests in high-value solutions to diversify its revenue and increase exposure to high-growth markets. The company develops a range of capacitors for critical applications in the military, medical, electric vehicle, and 5G market segments. They have diverse applications that vary from pacemakers and MRI equipment to orbiting satellites and electric cars, serving markets such as EMI, oil exploration, optoelectronics, telecommunications, and the automotive industry.

The unique formulations of Knowles ceramics offer innovative solutions to complex challenges related to high performance, high frequency, high reliability, and high temperature. When choosing the right capacitor for your electric vehicle (EV) subsystem, selecting a single-size solution may not optimize your engineering challenges. Knowles Precision Devices provides a comprehensive range of automotive-grade capacitors tailored to your needs.

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  • High Q
  • SMD Capacitors
  • MLCCs with Leads
  • AEC-Q200
  • Broadband Blocks
  • Capacitor Assemblies
  • Trimmer
  • Aluminum Polymer Capacitors
  • Film Capacitors
  • Mica Capacitors
  • Supercapacitors

Knowles Precision Devices Capacitors

We manufacture Capacitors for some of the world’s most demanding applications. The markets we serve include implantable medical devices and medical equipment, military, aerospace/avionics, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, optical networks, telecom, and automotive.

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

We support voltages to 12kV and high-level application-specific screening such as AEC-Q200 for automotive, MIL-PRF-55681 for medical implantable, and more.

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.

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