Custom Manufactured HEMP/EMP Filters

Captor Corporation, the expert in electromagnetic interference filters, offers custom HEMP/EMP filters, that target power, signal and tempest interference. We perform the design, engineering, layout, manufacturing and assembly as well as the testing, verification, consulting, prototyping and research and development. We provide assembly of components, connectors, and termination configurations while offering options such as HEMP protection modules, certified PCI data and custom tailoring.

Captor can provide existing designs for power lines, audio-data lines and control-signal lines for AC/DC power, telephone, analog fire alarms, servo motors and synchro transmitters. Ratings are 0 to 480 volts and 0 to 100 amps although higher currents are possible. Utilizing non-nutritive materials, our HEMP/EMP filters can be stored from -55 to +105 °C and are operational from -40 to +71 °C, up to 15,000 feet above sea level and in humidity ranging from 10 to 90%.

Captor can handle quick-turn prototypes up to large-scale production runs with lead times of two to three weeks on stock orders and 10 to 12 weeks for custom orders. For more information on our custom manufactured HEMP/EMP filters please see the chart below or contact us directly.

What Is a HEMP Filter?

High-altitude electromagnetic pulse (HEMP) filters protect electrical infrastructure and equipment from electromagnetic pulses from high atmosphere nuclear blasts, geomagnetic storms, solar flares, and other natural phenomena. They are vital to homeland security and national defense, preventing damage to communications and electrical equipment in the civil and military sectors.

HEMP can damage any equipment, systems, or infrastructure containing electronic components without adequate shielding, resulting in disabled equipment or permanent damage. HEMP filters from Captor Corporation can be standard or custom-made and protect communication lines and infrastructure from the dangers resulting from a natural or nuclear device-generated HEMP.

HEMP Filters From Captor Corporation

Captor Corporation manufactures various HEMP filters and NEMA cabinets. These include:

Control/Signal Line HEMP Filters High Performance

Control/Signal Line HEMP Filters – Standard Performance

. Our standard HEMP filters come with a voltage rating of 48 VDC and 120 VAC between 0 and 60 Hz. They comply with paragraph 4.6.1 of MIL-PRF-15733 for visual and mechanical inspection standards, and their capacitance meets method 305 of MIL-STD-202 at 1 kHz. Their insulation resistance complies with paragraph 4.6.7 of MIL-PRF-15733 with HEMP protection module removed, and their dielectric withstanding voltage complies with MIL-PRF-15733 with Hemp protection module removed. They also meet MIL-STD-220 requirements for standard insertion loss for 20 dB at 10 kHz and 80 dB at 10 MHz to 10 GHz.

Control/Signal Line HEMP Filters – High Performance

. Our high-performance HEMP filters come with a voltage rating of 48 VDC and 120 VAC between 0 and 60 Hz. They comply with paragraph 4.6.1 of MIL-PRF-15733 for visual and mechanical inspection standards, and their capacitance meets method 305 of MIL-STD-202 at 1 kHz. Their insulation resistance complies with paragraph 4.6.7 of MIL-PRF-15733 with HEMP protection module removed, and their dielectric withstanding voltage complies with MIL-PRF-15733, paragraph 4.6.5 with HEMP protection module removed. They also meet MIL-STD-220 requirements for high-performance insertion loss for 100 dB at 14 kHz to 10 GHz.

NEMA Cabinets for Multiple HEMP Filters

. In addition to our filters, our stainless steel modified NEMA Type 1 enclosures provide shielding from more than 100 dB to 10 GHz on the protected side. We supply screw type or push pin terminal blocks, and we can provide the cabinet alone or the cabinet with pre-installed filter inserts to meet your specifications.

Custom HEMP Filters

As an expert in electromagnet interference filters, Captor Corporation offers custom HEMP/EMP filters that target power, signal, and tempest interference. We perform the design, engineering, layout, manufacturing, and assembly as well as the testing, verification, consulting, prototyping, and research & development. We provide assembly of components, connectors, and termination configurations while offering options such as HEMP protection modules, certified PCI data, and custom-tailoring.

Dangers of HEMP

An electromagnetic pulse (EMP) is a burst of energy caused by natural or human-made means. It creates various electrical and magnetic energy fields that can cause permanent or temporary damage to electrical equipment and systems. Nuclear devices and similar natural phenomena produce an EMP that occurs in the higher atmosphere called a HEMP.

Various internal and external conditions can influence a HEMP’s impact on electrical equipment and systems. The nuclear device’s gamma yield output, energy yield, and altitude of detonation are crucial factors, along with the device’s interactions with Earth’s magnetic fields. The shielding on the target equipment, systems, or infrastructure is also a factor in the HEMP’s impact. The U.S. power grid is an example of critical infrastructure under constant risk of an EMP from natural sources and otherwise.

Contact Captor Corporation for HEMP Solutions

Captor Corporation can handle quick-turn prototypes up to large-scale production runs with lead times of two to three weeks on stock orders and 10 to 12 weeks for custom orders. For more information on our custom manufactured HEMP/EMP filters please see the chart below or contact us directly.

Portfolios

Custom HEMP/EMP Filter 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

Connectors

Military
Commercial

Termination Configurations

Quick Disconnect Terminal Tabs
Threaded Studs
Connectors
Solder Terminals
Custom

Options

HEMP Protection Modules
Certified PCI Data
Custom Tailoring

Existing Designs

Power Lines (Intrasite)
Audio/Data Lines (Intersite)
Control/Signal Lines (Intersite)

Existing Applications

AC/DC Power
Telephone Lines
Analog Fire Alarms
Servo Motors
Synchro Transmitter

Protection

Circuit
HEMP/EMP
Transient Voltage

Voltage Rating

0 to 480 V

Current

0 to 100 Amps
Higher Currents Possible

Insertion Loss

100 dB minimum from 14 kHz to 10 GHz

Frequency

DC to 400 Hz

Operating Temperature

-40 to +71 °C

Storage Temperature

-55 to +105 °C

Altitude

Maximum 15,000 feet above sea level

Humidity

10 to 90 %

Fungus

Non-nutritive materials are used

Enclosures (Corrosion)

Hermetically Sealed Steel
Aluminum

Plating

Tin-Lead

Standards

MIL-STD-188-125-1

Input

Inductive

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 (Prototype)

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)