- Filters are listed per UL specification #1283
- Temperature Range: Operating -55°C to +85°C
- Enclosures are made from cold rolled steel with continuously welded seams
- Filter ground path connecting surfaces shall be tin plated or stainless steel
- Conduit hubs or clearance holes may be provided if specified when ordering
- Each phase filter is individually removable
- Internal filters are filed with a non-flammable impregnant and hermetically sealed
- Legs for floor mounting may be provided if specified when ordering
- Filters for 300AMP and up have 6” x 2” mounting U-Channel
HEMP Filters
Series DMC-FCHS-HEMP Single Individual Filter Elements
Specifications
ELECTRICAL
CURRENT RATING: The filters shall be capable of withstanding 140% of rated current for 15 minutes without any deterioration.
INSERTION LOSS: The HEMP Filters shall provide the specified insertion loss of 80 db minimum over its indicated frequency range when measured in accordance with the applicable MIL-STD-220C by a government approved laboratory.
VOLTAGE: The filters shall be capable of operating continuously at full- rated voltage and of withstanding an initial voltage test of twice the rated voltage for one minute.
OPERATING TEMPERATURE
FILTER ELEMENT: Assembly: from 0°F to 104°F (-18°C to 40°C) at rated voltage and full load operations Components: from 0°F to 150°F (-18°C to 65°C) at rated voltage and full load operation
MECHANICAL
CASE: The HEMP Filters case shall be made of cold-rolled steel.
FINISH: All HEMP Filters cases shall be made corrosion-resistant with suitable lacquer over primer, All unfinished grounding surfaces shall be protected by suitable plating.
IMPREGNANT: The impregnant shall be non-flammable as classified by Underwriters Laboratories.
TERMINALS: The terminals shall be made of high temperature alumina ceramic. The ceramic terminal shall have a flexible insulated lead, one end of which is permanently affixed to the terminal, The other end shall be terminated in a permanently affixed lug which shall be mounted on approved flame-retardant insulator.
| Part Number | Current Rating (AMP) | Voltage Rating | Frequency Rating (Hz) | Dimensions (INCHES) | Weight Approx. (LBS) | |||||
| LG / LL VAC | VDC | A±.060 | B±.060 | C±.060 | D±.060 | E±.060 | ||||
| DMC-FCULX-4 X 30E2 HEMP | 4 x 30 | 277 / 480 | 600 | 60 | 28 | 38 | 6 | 64 | 26 | 220 |
| DMC-FCULX-4 X 60E2 HEMP | 4 x 60 | 277 / 480 | 600 | 60 | 28 | 41 | 8 | 64 | 29 | 315 |
| DMC-FCULX-4 X 100E2 HEMP | 4 x 100 | 277 / 480 | 600 | 60 | 57 | 60 | 10 | 80 | 48 | 520 |
| DMC-FCULX-4 X 225E2 HEMP | 4 x 225 | 277 / 480 | 600 | 60 | 28 | 60 | 16 | 64 | 48 | 750 |
| DMC-FCULX-4 X 250E2 HEMP | 4 x 250 | 277 / 480 | 600 | 60 | 28 | 60 | 16 | 64 | 42 | 750 |
| DMC-FCULX-4 X 300E2 HEMP | 4 x 300 | 277 / 480 | 600 | 60 | 60 | 84 | 16 | 66 | 44 | 850 |
| DMC-FCULX-4 X 400E2 HEMP | 4 x 400 | 277 / 480 | 600 | 60 | 60 | 84 | 16 | 66 | 44 | 975 |
| DMC-FCULX-4 X 500E2 HEMP | 4 x 500 | 277 / 480 | 600 | 60 | 60 | 84 | 16 | 66 | 44 | 1075 |
| DMC-FCULX-4 X 600E2 HEMP | 4 x 600 | 277 / 480 | 600 | 60 | 45 | 84 | 34 | 38 | 44 | 1600 |
| DMC-FCULX-4 X 800E2 HEMP | 4 x 800 | 277 / 480 | 600 | 60 | 60 | 72 | 34 | 66 | 44 | 2400 |
| DMC-FCULX-4 X 1000E2 HEMP | 4 x 1000 | 277 / 480 | 600 | 60 | 60 | 72 | 34 | 66 | 44 | 2500 |
| DMC-FCULX-4 X 1200E2 HEMP | 4 x 1200 | 277 / 480 | 600 | 60 | 60 | 72 | 34 | 64 | 44 | 2750 |
| DMC-FCULX-4 X 1500E2 HEMP | 4 x 1500 | 277 / 480 | 600 | 60 | 60 | 72 | 34 | 64 | 44 | 2900 |
*All Filter Cabinets are also available in 3 line and 4 line configuration
| PART NO | CURRENT RATING (AMP) | VOLTAGE RATING (VAC) | FREQ RATING (HZ) | WIRE SIZE | DIMENSION (INCH) | INSERTION LOSS (DB) | ||||||
| A | B | C | 100kHz | 1MHz | 10MHz | 100MHz | 1GHz | |||||
| DMC-FCH-800- E2 | 800 | 277 | 0-60 | 2.5 x 0.5 Bus Bar | 35 | 17 | 14 | 80 | 80 | 80 | 80 | 80 |
| DMC-FCH-400- E2 | 400 | 277 | 0-60 | 250MCM | 32 | 16 | 12 | 80 | 80 | 80 | 80 | 80 |
| DMC-FCH-100- E2 | 100 | 277 | 0-60 | #2 | 30 | 14 | 10 | 80 | 80 | 80 | 80 | 80 |
| DMC-FCH-60- E2 | 60 | 277 | 0-60 | #10 | 28 | 14 | 8 | 80 | 80 | 80 | 80 | 80 |
| DMC-FCH-30- E2 | 30 | 277 | 0-60 | #10 | 28 | 14 | 6 | 80 | 80 | 80 | 80 | 80 |
Frequently Asked Questions
HEMP filters are specialized devices that block harmful electromagnetic pulses from reaching sensitive electronics, preventing damage or malfunction. They safeguard circuits by attenuating high-frequency transients.
They absorb and redirect EMP energy through filtering and grounding, preventing high-energy spikes from entering electrical systems. This ensures critical equipment remains operational during HEMP events.
Defense, aerospace, telecommunications, power utilities, and data centers commonly deploy HEMP filters. Any sector relying on uninterrupted electronic systems benefits from their protection.
HEMP filters are available in a wide range of AC/DC voltage ratings, typically from 120V to 600V, and currents from a few amps up to several hundred amps. Ratings vary based on application and system requirements.
Insertion loss typically ranges from 40 dB to over 100 dB depending on frequency and design. Higher attenuation ensures maximum protection against EMP transients.
Cabinets are generally made from steel or aluminum with conductive coatings for shielding. Internal components often include ferrite cores, capacitors, and surge-resistant elements.
They typically operate between -40°C to +85°C, with some rugged designs handling even wider extremes. This ensures reliability in harsh environments.
Yes, most HEMP filters meet MIL-STD-188-125, MIL-STD-461, and other EMP/military standards. Compliance ensures verified protection in defense and critical infrastructure applications.
Yes, they can be retrofitted into power lines or communication cables of existing installations. Integration enhances protection without major redesigns.
They prevent catastrophic system failures from EMP events, ensuring continuity of operations. Protecting electronics is crucial for national security and uninterrupted data services.
What Our Clients Say
Dependable HEMP Filters with Strong Protection
August 27, 2026
We’re very satisfied with the performance of these HEMP Filters. They provide strong protection and have helped reduce the risks associated with electromagnetic pulse interference. The installation process was straightforward, and the overall build quality feels solid and dependable. A well-engineered product that we’re happy to recommend.
Durable Filters for Reliable System Stability
August 27, 2026
We’re very happy with how these filters have performed. They’ve been effective in reducing high-frequency disturbances and have helped make our systems more stable since installation. The construction feels strong and durable, which is reassuring for long-term use. Overall, a reliable product that has delivered exactly what we needed.
Reliable HEMP Filters for Strong Protection of Sensitive Equipment
August 24, 2026
Reliable HEMP Filters that perform well under stress conditions. They provide strong protection for sensitive equipment. Solid build quality and long service life. Recommended choice.
High-Quality EMI Filters for Enhanced Shielding and System Reliability
August 24, 2026
High-quality filters with excellent electromagnetic shielding. They improve system reliability and reduce disruptions. Easy to install and maintain. Very satisfied with performance.
Durable HEMP Filters for Stable Power and Reliable Protection
August 20, 2026
These HEMP Filters are very effective in real-world conditions. They ensure clean and stable power flow. Durable casing and quality engineering stand out. Great investment.
Reliable EMI Filters for Effective Electronic System Protection
August 20, 2026
Excellent product for safeguarding electronic systems. The filters reduce interference effectively and maintain stability. Strong mechanical design and reliable operation. Highly recommended.
Durable HEMP Filters for Reliable Protection in Harsh Environments
August 18, 2026
Outstanding HEMP Filters with consistent performance and durability. They provide strong protection in harsh environments. Easy integration into systems. Very happy with results.
Robust HEMP Filters for Reliable High-Energy Interference Protection
August 18, 2026
These filters offer excellent defense against high-energy interference. Equipment stability improved significantly after installation. Build quality is robust and dependable. Great value for critical systems.
Reliable HEMP Filters with Superior Electromagnetic Protection
August 14, 2026
Very reliable HEMP Filters with excellent suppression capability. They protect equipment from severe electromagnetic disturbances. Strong housing and premium components used. Highly recommended solution.
High-Performance HEMP Filters for Reliable EMI/EMP Protection
August 14, 2026
High-performance HEMP Filters that ensure strong EMI/EMP protection. They work efficiently in demanding environments. Installation was smooth and results were immediate. Great product for industrial applications.
Outstanding HEMP Filters with Reliable Electromagnetic Protection
August 11, 2026
These HEMP Filters deliver outstanding protection and stable performance. They reduce electromagnetic disturbances effectively. The construction is durable and long-lasting. Very satisfied with the overall quality.
High-Performance HEMP Filters for Critical Infrastructure Protection
August 11, 2026
Excellent HEMP Filters with strong shielding performance against high-energy pulses. They provide reliable protection for sensitive electronic systems. Build quality is very solid and installation is easy. Highly recommended for critical infrastructure use.
