EMI Filters for the Military and Defense Industry

Many electric and electronic devices, such as motors, power supplies, and microprocessors, generate high-frequency electromagnetic radiation to some degree. While this is a normal, common occurrence, it is problematic for nearby electronic circuits and equipment. Electromagnetic interference, or EMI, occurs when high-frequency radiation “noise” impacts signal transmission and system performance in the surrounding area. Degraded signal quality and incomplete transmission due to EMI put critical systems at risk. Interference from high-altitude electromagnetic pulse (HEMP), whether as an attack or naturally caused due to lightning, can also cause these problems.

EMI filters are a common and effective way to help mitigate the effects of EMI and HEMP interference. These devices enhance system performance by redirecting and reducing electromagnetic noise. The filters aerospace and military communication systems rely on must meet military specifications and other industry regulations.

Keep reading to learn more about military EMI filters, the filter options Captor Corporation provides, and how they are used.

The Importance of EMI Filters for Defense Applications

EMI filters counter the effects of electromagnetic interference on electronics and circuits, stabilizing signal and power transmission and integrity. In military and defense applications, this kind of EMI “noise” can disrupt mission-critical equipment and endanger the safety of military personnel and civilians. Some examples of systems and equipment EMI effects include:

  • Navigation systems
  • Aerospace and ground communications devices
  • Wireless locks
  • Object detection systems and sensors
  • Weaponization of EMI (i.e., HEMP attack)

EMI and HEMP filters are then critical in the defense sector as they protect mission critical systems against radiated and emitted EMI, which can help ensure continued operations essential to national security and human safety.

Types of EMI Filters Used in Military/Defense

Captor offers the following military custom off-the-shelf (MIL COTS) single- and three-phase EMI filters from Delta and Wye that mitigate conducted emissions as specified in MIL-STD-461 CE102 from 10KHZ to 10MHz:

  • 250 VAC COTS MIL-STD-461 Single-Phase EMI Filters
    • A-10900-05: 5 ampere current
    • A-10900-15: 15 ampere current
    • A-10900-30: 30 ampere current
    • A-10900-50: 50 ampere current
  • 120/208 VAC COTS MIL-STD-461 Three-Phase Delta EMI Filters
    • A-10901-05: 5 ampere current
    • A-10901-15: 15 ampere current
    • A-10901-30: 30 ampere current
    • A-10901-50: 50 ampere current
  • 254/440 VAC COTS MIL-STD-461 Three-Phase Delta EMI Filters
    • A-10902-05: 5 ampere current
    • A-10902-15: 15 ampere current
    • A-10902-30: 30 ampere current
    • A-10902-50: 50 ampere current
  • COTS MIL-STD-461 Three-Phase Wye EMI Filters
    • A-10903-05: 5 ampere current
    • A-10903-15: 15 ampere current
    • A-10903-30: 30 ampere current
    • A-10903-50: 50 ampere current

These filters are tested to and meet the requirements of:

  • MIL-STD-202
  • MIL-STD-220
  • MIL-PRF-15733
  • RTCA/DO-160

Our EMI filters are specifically designed and tested to meet the requirements of the defense and aerospace industries. In addition, our company is AS9100 D, ISO 9001:2015, IPC 610, IPC-620, and J-STD-001 certified for quality products and services.

Applications for Military/Defense Filters

Founded in 1965, Captor is the most trusted name in EMI filters, with a focus on engineering-oriented management, building customer relationships, and military-relevant industry experience. Some of the most common applications our filters are used for include:

  • Military Ground Operations
  • Aerospace and Avionic Systems
  • Naval Defense Systems
  • Missile and Weapon Systems
  • Communication Systems
  • Power Supplies

EMI Filters From Captor Corporation

EMI filters are crucial for blocking electromagnetic interference and high-altitude electromagnetic pulse attacks that threaten equipment, disrupt communications, and potentially threaten national security. Partnering with an experienced provider of EMI filtering solutions makes equipment more robust against these risks. With 60 years of experience, our team and our products stand out for their dependability and quality. Learn more about us on our website.

Contact us to learn how our products and services can help mitigate EMI risks for military and defense equipment.