Custom Capacitor Assemblies

Knowles’ custom capacitor solutions combine ceramic and electrolytic technologies into engineered assemblies that deliver high performance and reliability space-constrained power and RF applications. Our custom assemblies are designed to meet specific electrical, mechanical, and environmental requirements, with flexible configurations and in-house manufacturing support. 

Key Highlights:

• Smaller footprint / higher density: Consolidate multiple capacitors into one assembly to save PCB space.
• Lower losses at frequency: Low ESR/ESL and high-Q designs reduce heat and signal drift.
• Built for harsh environments: Designed to withstand thermal/mechanical stress, shock, and vibration.
• Flexible integration: Multiple lead/termination styles and customizable mechanical formats fit complex layouts.
• Tested & compliant: Assemblies are fully tested, with high-reliability options meeting military standards. 
• Custom engineering + manufacturing support: In-house machining, plating, and assembly enable custom builds.
  

Defibrillator Capacitors

Reliability and performance have positioned Knowles' Cornell Dubilier brand as an industry leader in film capacitors for external defibrillator applications. Designed with extensive process validation and manufactured under a rigorous quality management system, these capacitors deliver high reliability, long life, complete traceability, and a compact size ideal for hospital, emergency, first‑responder, and public access defibrillators.

Key Highlights:

DC Link, DC Filtering Solutions

Knowles' Cornell Dubilier brand is a leading designer and manufacturer of custom DC link and DC filtering capacitors for commercial and military inverter applications. These solutions offer flexible packaging options with low inductance, high-voltage terminations and ultra-high ripple current capability to meet demanding requirements. 

• Capacitance up to 50,000µF
• Voltage (DC) up to 100,000 VDC
• Current (peak) up to 100,000 amp
• Inductance (nH) as low as 25nH
• Energy density up to 3.0J/cc
• Metal or isolated plastic cases 
• Water-cooled construction available
• Wide variety of terminations

AC Resonant and Harmonic Filter Solutions

Knowles' Cornell Dubilier brand is a leading designer and manufacturer of custom AC voltage, resonant tank, and harmonic filtering capacitors for industrial and military applications. These solutions offer flexible metal or plastic packaging with low inductance, high voltage terminations, ultra-high RMS current capability, and optional water cooling. 

Key Highlights:

• KVAR up to 15,000
• Vrms up to 8,500
• Irms up to 5,000
• Frequency up to 500 KHz
• Option for drawn or custom welded metal cases
• Option for water-cooled construction
• Wide variety of terminations
  

High Energy, Pulse Discharge Solutions

Knowles' Cornell Dubilier brand specializes in designing and manufacturing custom high-energy discharge capacitors for critical electrification, medical, military, research and commercial pulse power applications. We work closely with engineers to deliver reliable, application-specific solutions and offer low inductance designs, high-voltage terminations and flexible packaging options. 

Key Highlights:

• Capacitance: 5nF - 50,000µF
• Capacitance Tolerance: Custom
• Voltage Range: Up to 150kV
• Peak Current Level: Up to 250kA
• Inductance: <10nH (Custom Designs)
• Energy Density: 2.75 J/cc
• Pulse Life (Nominal): Up to 1 x 10¹⁰ Cycles
• Rep Rate: .01-1000Hz

Planar Arrays & Discoidals

Knowles' planar arrays and discoidal capacitors are engineered for high-performance EMI filtering in demanding medical, aerospace, defense, and industrial applications. Built on proven multilayer ceramic technology, these solutions offer exceptional electrical performance, mechanical precision, and long-term reliability for filter connectors, bulkhead mounting, and hybrid circuits. 

Key Highlights:

• High-performance EMI Filtering
• Compact, application-specific designs
• Rugged, high-reliability construction
• Flexible material options - available in C0G/NP0, X7R, and MOV

Machining & Plating Solutions

Knowles delivers high-precision, high-reliability machined and plated solutions designed for the most demanding medical, aerospace, defense and other harsh environment applications. By offering precision tooling, machining, plating, assembly, and design/engineering services under one roof - no outsourcing! - we can provide tight tolerances, consistent quality, and end-to-end control from design through production. 

Key Highlights:

• Fully in-house manufacturing: precision tooling, plating, and assembly under one roof for complete process control and consistency.
• Tight tolerances, superior finishes: expertise in small, complex geometries ensures high precision, smooth surface finishes, and reduced defects.
• Advanced, high-reliability plating: proven capability in challenging and MIL-SPEC plating, including high-strength gold.
• Engineering-driven customization: dedicated engineering and custom tooling support from design through production.
• Prototype-to-production scalability: flexible solutions for specialized projects, from early prototypes to full production runs.