Custom EMI Filters/RFI Filters by Captor Corporation - Tipp City, Ohio
Call: 937-667-8484
Email: sales@captorcorp.com

Custom EMI Filter/RFI Filter Design Capabilities by Captor Corporation

At Captor Corp., we are the experts in electromagnetic interference. We custom design EMI filter/RFI filter solutions to meet the exact specifications of your application, usually more cost effectively than most competitors’ catalog items. With more than 10,000 designs completed to date, we have the proven capability of delivering high reliability electromagnetic, power line, signal line, and TEMPEST filters for military, aerospace, commercial, and industrial applications.

In any chassis configuration imaginable, and with a choice of multiple termination interfaces, we build standard filter solutions rated 0-400 VDC, 0-480 VAC, 0-400 A, and DC-400 Hz, with higher voltages, currents, and frequencies readily available on request. Our services include filter circuit design and analysis, packaging design and layout, and quick turnaround prototyping.

Our engineering support extends from project inception to completion, and includes extensive qualification, environmental, and acceptance test procedures to ensure all filters meet applicable specifications.

To learn more about our custom EMI filter/RFI filter solutions, read below, or contact us today to discuss how we can help you with your application.

What is EMI

To better understand the importance of EMI filters, it is important to understand what EMI is and the types of EMI that Captor filters are designed to eliminate. Simply put, EMI (electromagnetic interference) is any noise or electrical signal that has the potential to cause the disruption of an electrical signal. The effects of EMI may present themselves as something innocuous as static heard in a radio transmission, to something as serious as a weapon systems malfunction. There are many types of EMI that require different filtering solutions. Knowing what they are simplifies the process of source identification.

Conducted EMI is interference flowing through any conductor or wire; in this type of EMI, the interference is caused by physical contact of conductors or wires.

Common Mode EMI is typically associated with higher frequencies; in this type of EMI, the interference will flow in the same direction across a single or many conductors.

Differential EMI is mostly found in lower frequencies; this type of interference is the result of one affected conductor coupling EMI to adjacent conductors. It can flow in opposite directions, which may cause signals to cancel each other out.

Radiated EMI, as its name implies, is transmitted; these magnetic or electrical fields flow through the air much like radio waves from an antenna. They are the most common form of EMI and created by virtually any electronic or electrical device.

The pervasive nature of EMI cannot be understated; that’s why proper filtering is critical as EMI can originate from multiple sources. This is a short list of possible EMI sources that can benefit from filtering:

  • Power supplies
  • Generators
  • Ignition systems
  • Motors
  • Voltage regulators
  • Switches, relays
  • Oscillators
  • Power transmission lines
  • Computing devices
  • Battery chargers
  • Radios
  • Radar
  • Sonar
Standard EMI Filters Request for Quote

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Custom EMI Filter/RFI Filter Design Capabilities

General Capabilities Custom
Build to Print
Process Design
Engineering
Layout
Manufacturing
Assembly
Testing
Verification
Consulting
Prototyping
Research and Development
Equipment Automated
Manual
Components Inductors
Capacitors
Resistors
Relays
Diodes
Chokes
Varistors
Termination Interfaces Threaded Terminals
Solder Terminals
Connectors
Wire Leads
Wire Harnesses
Connectors Military
Commercial
Protection Circuit
HEMP/EMP
Transient Voltage
Insertion Loss / Attenuation 0 to 100 dB
Voltage Rating 0 to 400 VDC
0 to 480 VAC
Higher Voltage rating available upon request
Current 0 to 400 Amps
Higher Currents available upon request
Frequency DC to 400 Hz
Other frequencies available upon request
Typical Operating Temperature -55 to +71 °C
Typical Storage Temperature -55 to +105 °C
Standards MIL-STD-461
MIL-PRF-15733
MIL-STD-202
MIL-STD-220
Chassis Material CRS, Brass, Aluminum, Stainless Steel
Configurations Single L
Single Pi
Double L
Double Pi
Inspection 100% Test
Visual
AQL
Testing Altitude
Temperature Cycling
Shock
Vibration
Electrical
Mechanical
Environmental
Quality Control Test Plan
Test Report
Secondary Operations (In-House) Assembly
Machining
Forming
Bending
Welding
Quick Turn Prototypes
Production Volume Prototype to Large Scale Production Runs
Typical Lead Times 1 week (Stock)
10 to 12 weeks (Custom)
1 to 3 weeks (Prototypes)

Additional Information

Industry Focus Electrical
Electronic
Military
Aerospace
Commercial
Industry Standards AS9100 Rev C
ISO 9001:2008
IPC 610
J-STD-001
File Formats SolidWorks
AutoCAD
PCAD (Circuit Boards)
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