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Johanson Dielectrics, Inc. (JDI) is the premier supplier of EMI Planar Capacitor Filter Arrays to the Filtered Connector Industry. Planar Arrays were introduced to the electronic industry in the 1980's, and achieved preeminence in the early 1990's when they were tested and accepted as the capacitor design of choice in military applications. Today they are the fundamental building block for filtered connectors found in Aerospace, Biomedical, Military, Satellite, Industrial and Communication electronics. Many of JDI core staff were instrumental in the development of this technology. JDI continues to push the envelope in array technology by extending the performance limits of our product and designing innovative and quality-focused solutions to customer challenges. JDI offers array product lead times that are consistently half those of our competitors, even for the most complex products. Our design engineering strength enables incorporation of seemingly impossible combinations of EMI Filter capacitance values, voltage ratings, and complex geometries competitive prices. With nearly 3,000 existing EMI Filter designs from 2 pins to 155 pins, there is a good chance we have a design waiting for you.

Available EMI Filter Products:
  • Circular Arrays
  • Rectangular Arrays (ARINC 404/600)
  • D-Subminiature Rectangular Arrays
  • Custom Capacitor Arrays
  • Discoidal Capacitors
  • Discoidal EMI Capacitors
  • X2Y® Technology Products
Applications:
  • Power Supplies
  • Voltage Multipliers
  • Data Isolation
  • Surge Protection
  • Industrial Control Circuits
  • Custom Applications
Planar Array Capacitors for EMI Filtering
Arrays
Circular Arrays
Circular Array Capacitors for EMI Filtering
Physical LayoutDielecttric MaterialAvailable CapacitanceWorking VoltageDWV Voltage
MIL-1560
MIL-1554
MIL-1669
MIL-1651
MIL-1698
MIL-33702
MIL-AUDIO
X7R & NP047 pF to 800 nFUp to 2,000 VDCUp to 3,000 VDC
Rectangular Arrays (ARINC 404/600)
Rectangular Array Capacitors for EMI Filtering
Physical LayoutDielecttric MaterialAvailable CapacitanceWorking VoltageDWV Voltage
AR-010 Through AR-150X7R & NP047 pF to 940 nFUp to 1330 VDCUp to 2,000 VDC
D-Subminiature Rectangular Arrays
D-Subminiature Array Capacitors for EMI Filtering
Physical LayoutDielecttric MaterialAvailable CapacitanceWorking VoltageDWV Voltage
Full size
Mini-D
Micro-D
Nano-D
Combo-D
Power-D
Special
X7R & NP047pF - 210nF
47pF - 100nF
47pF - 22.5nF
47pF - 3.0nF
47pF - 6.0nF
47pF - 120nF
47pF - 50nF
≤ 2,400
≤ 1,000
≤ 680
≤ 200
≤ 800
≤ 680
≤ 300
≤ 3,600
≤ 1,500
≤ 1,020
≤ 500
≤ 1,200
≤ 1,020
≤ 750
Custom Capacitor Arrays

Custom Capacitors enable a virtually unlimited custom array capability. Any shape, configuration or geometry is possible, and the performance characteristics of our arrays are only limited by the physics of the materials being used, and JDI & Johanson engineering is constantly focused on new material development to establish new limits. If you have a requirement and someone has said NO, call us because we want to say YES!

Custom Array Capacitors for EMI Filtering
Discoidal Capacitors
Discoidal Capacitors

JDI Discoidal Feed-through Capacitors are the functional element in the popular and widely used EMI feed-through filters. JDI Discoidal capacitors are versatile in meeting varied customer voltage, capacitance and dimensional requirements. These multi-layer capacitors are nonpolar, small, reliable and high in dielectric strength. These devices have very low impedance in their ground paths as their design allows the signal many (up to 100) paths to ground. Discoidal capacitors are ideal for by-pass, filtering, coupling, single line EMI/RFI suppression, and high frequency applications.

  • Robust construction, resist damage from handling
  • Capacitance values from 10 pF to 11.2 μF
  • Test standards and procedures per MIL-STD-202 and MIL-C-123
  • Voltage ratings from 50 to 3000 VDC and 50 to 240 VAC
  • Low ESR and ESL, non-polar designs
  • Nearly any outside/inside diameter combination, circular or square

While our discoidal product line is far too varied to list all available combinations, performance characteristics for some of our popular models are listed on the next page. Call us to discuss your special requirements!

Discoidal EMI Capacitors Diagram
Discoidal EMI Capacitors Assortment
Nominal O.D. (")Dielecttric MaterialAvailable CapacitanceInside Diameter (")Thickness (")Rated Voltage
0.100 ± .005
0.150 ± .005
0.335 ± .005
0.345 ± .005
0.376 ± .005
0.643 ± .005
0.840 ± .005
X7R & NP010pF - 66nF
10pF - 200nF
10pF - 2.8μF
10pF - 6.0μF
10pF - 8.0μF
10pF - 15μF
10pF - 20μF
0.025 ± 0.048
0.037 ± 0.058
0.034 ± 0.088
0.040 ± 0.085
0.050 ± 0.075
0.063 ± 0.080
0.050 ± 0.075
0.025 ± 0.070
0.025 ± 0.070
0.045 ± 0.110
0.055 ± 0.110
0.065 ± 0.125
0.055 ± 0.150
0.080 ± 0.130
Up to 200 VDC
Up to 200 VDC
Up to 500 VDC
Up to 750 VDC
Up to 750 VDC
Up to 750 VDC
Up to 1000 VDC
X2Y® Technology Products
X2Y Technology Products

JDI X2Y® capacitor products employ a unique, patented internal design in which common shielding electrodes form a Faraday Cage around traditional capacitor electrodes. This nearly eliminates parasitics and creates two matched capacitors that are immune to temperature, voltage and aging performance differences. Available X2Y® products include planar capacitor arrays, discoidal capacitors, and large format chip capacitors offering the following performance advantages:

  • Significantly Lower EMI With One Component
  • Provide Superior Noise Suppression
  • Offer Differential And Common Mode Attenuation
  • Match Capacitance Line To Ground On Both Lines
  • Provide Low Inductance Due To Cancellation Effect
  • Reduce Component Count Whether Filtering Or Decoupling
  • Reduce Space Required For Passive Components
  • Significantly Increase Operating Bandwidth

X2Y® filter products provide optimal filtering and noise suppression solutions for DC motors, broadband filtering, filtered connectors, power line inlet modules, fiber optic and cellular applications.