What Kind of Capacitors Does Knowles Make?

Posted by Peter Matthews on Apr 2, 2025 8:00:00 AM
Peter Matthews

Knowles makes a wide range of capacitors. To really understand the breadth of our offerings, it helps to look at the scale of energy storage they offer. From tiny bypass capacitors in medical implants to massive energy-storage banks used in fusion experiments, our products span an incredible range. 

What Kind of Capacitors Does Knowles Make (1)

Finding the Right Capacitor for Your Application 

The energy stored in a capacitor is given by the equation: 

Screenshot 2025-03-20 at 1.11.21 PM

Both capacitance (C) and voltage (V) play a critical role in determining the energy a capacitor can store. Figure 1 illustrates the relationship between capacitance and voltage across different capacitor types, with lines indicating constant energy levels, demonstrating the range of storage capabilities available. Figure-1-Voltage vs Different Cap Types

Figure 1: A plot of capacitance and voltage for various Knowles capacitors, overlaid with diagonal lines representing constant energy levels from 0.1mJ to 100kJ. 

Here’s a breakdown of our capacitor offerings by energy level and function. While these categories help illustrate different capacitor applications, in practice, capacitors of all types can appear in a wide range of systems, often overlapping in their functions and use cases.

Millijoule-Scale Capacitors for Precision Filtering & Noise Suppression 

For applications requiring small-scale energy storage, filtering and signal integrity. 

Capacitor
Type

Product
Page
Approximate Energy Units   Application Example  Further
Reading 
Bypass Capacitor
(10nF, 250V)
 
View Products 0.3mJ  Medical Implants  Fundamental Capacitor Functions in the World of Electronics 
High Q Resonant Capacitor
(12nF, 1.2kV) 
View Products 8mJ  Resonant Power Converters  The Role of Resonant Capacitors in Power Electronics 

Safety Capacitor
(4.7nF, 2.5kV) 

View Products 14mJ  EMI Suppression  The Role of EMI Filters in Power Electronics 
 
Joule-Scale Capacitors for Power Conversion & Energy Storage 

For applications requiring higher energy storage and power handling. 

Capacitor
Type

Product
Page
Approximate Energy Units   Application Example  Further
Reading 
DC Filter Capacitor Assembly (3.9μF, 500V)  View Products 0.5J  Military Power Supplies  A Custom Approach to Large Capacitor Assembly 

Flatpack Capacitor
(20mF, 10V) 

View Products 1J  Portable Military Electronics  Selecting Capacitors for Charge Storage in Radar Power Amplifiers 

High-Voltage Safety Capacitor (40μF, 630V) 

View Products 8J  Solar Converter  Exploring Power Electronics Trends in Solar Power 

DC Link Capacitor 
(100μF, 800V) 

View Products 32J  Battery Energy Storage Systems (BESS)   
 
Kilojoule-Scale Capacitors for High-Energy Applications 

For applications requiring extreme energy storage and discharge capabilities.

Capacitor
Type

Product
Page
Approximate Energy Units   Application Example  Further
Reading 
Medical Discharge Capacitor (32μF, 6kV)  View Products 500J  Defibrillators  Capacitors for External Defibrillators 
Supercapacitor Module  
(36.6F, 9V) 
View Products 1.5kJ  Back-up Power Systems  The Benefits of Supercapacitors for Recloser Backup 

High-Energy Capacitor Bank (290μF, 26kV) 

View Products 98kJ  Plasma Research  How High-Energy Capacitor Banks Drive Plasma Research 

At Knowles, we provide capacitor solutions for a vast range of demanding applications, from precise noise filtering in medical implants to high-energy storage in capacitor banks for fusion experiments. Across the board, we have the expertise and technology to meet the unique demands of your project.

Want to explore further? Check out our full range of capacitor technologies or reach out to discuss your specific needs.

Insights Into Precision Passive Devices

Knowles Precision Devices is a premier global source for Capacitors, RF Filters, EMI Filters, Resonators, non-magnetic components and advanced dielectric materials. An umbrella for the brands of Compex, DLI, Johanson MFG, Novacap, Syfer and Voltronics, Knowles Precision Devices serves a variety of markets including military, aerospace/avionics, medical equipment, implantable devices, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, automotive, telecoms and data networks.

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