Enerdoor

What Enerdoor does

Enerdoor is a privately held manufacturer of electromagnetic compatibility (EMC) and power quality solutions, founded in 1992 and organized as a multi-entity group headquartered in Bedano, Switzerland with US operations in Westbrook, Maine. The company designs and produces EMI/RFI filters (single-phase, three-phase, three-phase plus neutral, and DC variants), harmonic filters including the active and FINHRM5C passive families, motor protection devices (load reactors, sine wave filters, dV/dt filters, snubbers), parallel filters, power transformers up to 225 KVA, surge protection devices, and voltage stabilizers. Enerdoor complements its product catalog with on-site CE certification and pre-compliance testing delivered through mobile laboratories, plus power quality analysis, motor analysis, and troubleshooting services.

The company's technology centers on suppressing conducted and radiated electrical noise, mitigating harmonic distortion (targeting THD below 5% and IEEE-519 / IEC61000-3-12 compliance), protecting motors from dV/dt and reflection spikes generated by VFDs and servo drives (including high-frequency sine wave and differential mode chokes for high-speed motors up to 10 GHz design capability), and providing certified power quality for automated industrial machinery. Manufacturing and R&D operate across facilities in the USA, Switzerland, Italy (Finmotor and Finlab), Hungary (Eichhoff Elektro), and Germany, with a product portfolio that has accumulated UL (US/Canada), CE, UKCA, and IEEE-519 certifications.

Enerdoor's business model is primarily hardware sales of filter and power quality components priced per unit with quantities ranging from 10 to 10,000 units, supported by a 5-year EMI filter warranty and large in-stock inventory for next-day fulfillment. A secondary revenue stream is professional services revenue from flat-rate CE certification testing with a guaranteed-compliance pledge. Go-to-market combines direct enterprise field sales (Technical Sales Engineers with up to 40% travel), authorized regional distributors (GD Rectifiers in the UK exclusive, G&G Technical in the Mid-Atlantic US, Peyman Electric in Iran), and event-driven demand generation through international trade shows including Middle East Energy. End customers are OEMs exporting machinery and operators in industrial automation, machine tools, renewable energy (solar/wind), military, data center / IT, HVAC, water/wastewater, medical equipment, and commercial buildings.

Name

Enerdoor

Legal name

Enerdoor, Inc.

Website

https://enerdoor.com

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

251–500 employees

Short description

Enerdoor, founded in 1992, is a privately held multi-entity group that designs and manufactures EMI/RFI filters, harmonic filters, motor protection devices, and related power quality components, serving OEMs and industrial operators across automation, machine tools, renewable energy, military, and data center verticals through direct sales and regional distributors, with on-site CE certification testing as a complementary service.

Ownership category

akta.pro rank

Product category

Industrial EMC and Power Quality Filters

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Testing Laboratories and Services (54138), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Electronic Coils, Transformers & Other Inductors (3677), Power, Distribution & Specialty Transformers (3612), Services-Testing Laboratories (8734)

akta.pro primary industry

EMI/EMC & Filtering Components (Common-mode chokes, filters, shielding materials) (IMAGAJAN)

akta.pro secondary industries

Passive Filters & RF Passives (LC Filters/Diplexers/Baluns/Attenuators) (HDAHANAG), Electrical Pre-Commissioning & Energization Support (EUAEAJAC)

Keywords

• EMI-RFI filters
• Harmonic filters
• Motor protection devices
• EMC compliance solutions
• CE certification testing

Headquarters

HQ city

Maine

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. EMI/RFI Filter Products: Sale of electromagnetic interference and radio frequency interference filters for industrial applications including single-phase, three-phase, DC, and parallel filter configurations
2. Motor Protection Products: Sale of motor protection devices including load reactors, sine wave filters, dV/dt filters, and snubbers designed to protect motors from voltage spikes and harmonics
3. Harmonic Filter Solutions: Sale of passive and active harmonic filters, line reactors, and power transformers for harmonic mitigation and power quality improvement
4. CE Certification and EMC Testing Services: On-site EMC testing and CE certification services with flat-rate pricing and guaranteed compliance solution. Mobile laboratories enable global customer support.
5. Power Transformers: Power range up to 225 KVA, available as single-phase, three-phase, isolation, and autotransformers with voltages up to 10 kV
6. Surge Protection Devices: Surge protection devices (SPD) and transient voltage surge suppressors (TVSS) for protection against overvoltage transients

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels8 records

Core offering

Enerdoor designs and manufactures EMI/RFI filters, harmonic filters, motor protection devices (load reactors, sine wave filters, dV/dt filters, snubbers), parallel filters, power transformers, surge protection devices, voltage stabilizers, and DC EMI filters for industrial automation, machine tools, renewable energy, military, data centers, HVAC, and medical equipment applications. The company also provides on-site CE certification and EMC compliance testing services through mobile laboratories, with a unique flat-rate pricing model and guaranteed-compliance pledge.

Product overview

Enerdoor is a manufacturer of power quality and electromagnetic compatibility (EMC) solutions, offering a comprehensive portfolio of specialized filters and related products. The core product lines include EMI-RFI Filters (Single-Phase, Three-Phase, Three-Phase Plus Neutral, and DC variants), Harmonic Filters (Active and Passive including the FINHRM5C, and Line Reactors), and Motor Protection devices (Load Reactors, Sine Wave Filters, dV/dt Filters, and Snubbers). Additionally, the company offers Parallel Filters, Power Transformers, Surge Protection Devices, and Voltage Stabilizers. These products work together to protect electrical equipment from interference, harmonic distortion, voltage spikes, and power quality issues. Enerdoor also provides associated services including CE Certification testing, Power Quality Analysis, Motor Analysis, and Troubleshooting services. The company operates globally with offices in the USA, Italy, Switzerland, Germany, and Hungary.

Differentiator

Problem solved

Functional benefit

Products and services

• EMI-RFI Filters Electromagnetic interference and radio frequency interference filters that suppress conducted and radiated emissions in industrial electrical systems. Available in Single-Phase, Three-Phase, Three-Phase Plus Neutral, and DC variants for industrial automation, renewable energy, and OEM machinery applications.
• Harmonic Filters Filters that mitigate harmonic distortion in electrical systems. Includes Active Harmonic Filters, Passive Harmonic Filters (such as FINHRM5C), and Line Reactors for industrial power quality improvement.
• FINHRM5C Passive Harmonic Filter Advanced passive harmonic filter with rated current from 10 to 750A (up to 1400A with paralleling), rated up to 690 Vac for HV version, Class H insulation (180°C) for ambient environments up to 70°C without derating. Reduces THD to less than 5% and ensures IEEE-519 and IEC61000-3-12 compliance.
• Motor Protection Devices Output filters that protect motors from harmful overvoltage and dV/dt spikes generated by VFDs and servo drives. Includes Load Reactors, Sine Wave Filters, dV/dt Filters, and Snubbers for motor protection in automated machinery.
• SWF Sine Wave Output Filter Sine wave filter with rated current from 2 to 1000A, minimal power loss, ventilation-free design, eliminates high-frequency disturbance, ideal for VFDs, servo drives, and motor cables longer than 250m.
• FVT dV/dt Filter

Quantifiable outcome

• THD reduced to less than 5% with FINHRM5C passive harmonic filter
• +3 more outcomes

Named customers4 records

Segments9 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• GD RectifierscoreChannel Partner/ Reseller/ Distributor · 1 January 2017Exclusive UK distributor since 2017. GD Rectifiers provides state-of-the-art EMC filters and power quality devices for material handling equipment, UK, and global markets carrying UKCA, CE and UL approvals. Featured together in CIE Magazine to discuss Enerdoor EMI filters.
• G&G TechnicalcoreChannel Partner/ Reseller/ Distributor · 1 January 2016Authorized distributor since 2016 for Mid-Atlantic region. G&G Technical brings decades of experience in motor protection field, providing assistance in sizing and selecting motor protection devices for customer systems.
• Peyman ElectriccoreChannel Partner/ Reseller/ Distributor · 1 January 1998Newest distributor in Iran since 1998. They provide the highest quality electrical, industrial and instrumentation equipment in the country including EMI-RFI filters, harmonic solutions, and motor protection devices.
• TECO SPAminorGTM or Marketing PartnerCollaborated with TECO SPA at UL event in Bologna, Italy. Partner for export regulations training and UL solutions for USA and Canada markets.
• FinlabcoreStrategic or Co-development PartnerAffiliate company in Italy offering EMC testing in Europe. Part of the Enerdoor Group providing comprehensive power quality and EMC solutions.
• FinmotorcoreStrategic or Co-development PartnerPart of Enerdoor Group located in Italy - Via Edison, 217 – 20019, Settimo Milanese (MI). Finmotor manufacturing facility producing filters and power quality solutions.
• Eichhoff ElektrocoreStrategic or Co-development PartnerPart of Enerdoor Group located in Hungary - Deákvári Fasor 8/A – 2600 Vác. Eichhoff Elektro Kft manufacturing facility.
• Middle East Energy / Dubai World Trade CentreminorGTM or Marketing PartnerParticipating at Middle East Energy 2026 (April 7-9) at Stand H2.J18 at Dubai World Trade Centre. Second consecutive year of participation at this leading international trade fair for power quality and energy infrastructure.
• UL SolutionscoreTechnology or IntegrationCollaboration with UL Solutions for UL approved filters and export regulations training. Enerdoor completed significant project with UL for line reactors, load reactors, dV/dt filters, and sine-wave filter series approval.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Leutron: Leutron manufactures EMC filters, surge protection devices, and power quality products for industrial and photovoltaic applications. Closely comparable niche peer to Enerdoor's filter and surge protection catalog.
• Elspec: Elspec develops power quality monitoring, harmonic mitigation, and active filtering solutions for industrial and renewable applications. Comparable to Enerdoor's harmonic filter and power quality analysis service offerings.
• MTE Corporation: MTE specializes in harmonic filters, line/load reactors, dV/dt filters, and sine wave filters for VFD and motor protection applications. Direct competitor to Enerdoor's motor protection and harmonic filter product lines serving industrial OEMs.
• Schaffner Group: Schaffner is one of the world's leading specialists in EMC filters, harmonic filters, and power quality components for industrial and railway applications. Directly comparable to Enerdoor across EMI/RFI filters, line reactors, and motor protection portfolios.
• Mirus International: Mirus designs and manufactures harmonic filters, line reactors, and power quality solutions for six-pulse and variable frequency drive applications. Directly comparable niche peer to Enerdoor's FINHRM5C passive harmonic filter and line reactor products.

Broad incumbents

• Eaton: Eaton offers power quality solutions including harmonic filters, surge protection, and UPS systems as part of its broader electrical portfolio. Competes with Enerdoor's surge protection and harmonic mitigation products for industrial customers.
• ABB: ABB is a global leader in drives, motors, and power quality products including harmonic filters and EMC solutions. Indirect overlap with Enerdoor via harmonic mitigation and motor protection sold to industrial automation customers.
• Schneider Electric: Schneider Electric provides harmonic filters, power factor correction, and surge protection within its industrial automation and energy management portfolios. Broadly comparable to Enerdoor on power quality but as part of a much larger ecosystem.
• Würth Elektronik: Würth Elektronik manufactures a broad range of passive electronic components including EMC filters, chokes, ferrites, and inductors. Overlaps with Enerdoor in EMI/RFI filtering components and common-mode chokes, though within a far larger component catalog.
• TDK (EPCOS / TDK-Lambda): TDK, through EPCOS and TDK-Lambda, manufactures a broad portfolio of passive EMC components, filters, and power supplies. Highly comparable to Enerdoor in EMI filters and chokes, but as part of a much larger and more diversified electronics portfolio.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/enerdoor
• Xx.com/Enerdoor

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Enerdoor