What Danotherm Electric does

Danotherm Electric A/S is a Danish designer and manufacturer of power resistors, founded in 1919 and operating as a wholly-owned subsidiary of Sweden's NIBE Industrier AB since 2006. The company produces specialized resistor families across four cooling architectures—convection-cooled (aluminum-housed ALPHA series, steel tube, steel grid, wire wound, rheostats, ModulOhm), liquid-cooled (CBW, WHB, WHBS, WHBSA, WHDN, WHHB ranging 6–1450 kW), ventilator-cooled (load banks, TRV tubes, traction brake resistors up to 2400 kW), and heatsink-cooled (BI-Alpha, PR thick film, CCH/HS-series)—with power ratings spanning 12 W to several megawatts and protection ratings up to IP66.

The company's business model combines direct enterprise field sales via regional area managers, project-based customization with thermal simulation and P-Spice compatible design tools, and a distribution network spanning 46 countries. Manufacturing is conducted in Denmark (Taastrup headquarters and R&D), Poland (Stargard, majority of aluminum-housed and wire-wound production since 2004), and Italy (ATE Electronics Srl facilities near Milan and Turin, acquired 2016), with an additional Spanish subsidiary (Backer Facsa). Revenue is generated through hardware sales of standard and customized resistor units plus engineering services for application-specific design.

Danotherm serves eight primary verticals—renewable energy, marine, automation, traction (rail), e-mobility, energy generation, mining/excavation, and oil & gas—with applications including brake resistors, neutral earthing resistors (NER), filter resistors, dump/load banks, and pitch control for wind turbines. Pricing is quote-based rather than list-price, reflecting the project-specific nature of most engagements, and the company holds multiple sector certifications (UL 508, IEC 60322, IEC 61373, IEEE 32, RoHS, REACH) that are table stakes in regulated rail and grid end markets.

Name

Danotherm Electric

Legal name

Danotherm Electric A/S

Website

https://danotherm.com

Company type

Private

Founded year

1919

Operating status

Operating

Headcount range

101–250 employees

Short description

Danotherm Electric A/S is a Danish manufacturer founded in 1919 that designs and produces specialized power resistors (12 W to 1450+ kW) for renewable energy, marine, rail, e-mobility, automation, mining, and grid infrastructure customers, selling through direct enterprise sales and a 46-country distributor network as a NIBE Group subsidiary.

Ownership category

akta.pro rank

Product category

Power Resistors

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416)

SIC

Electronic Coils, Transformers & Other Inductors (3677)

akta.pro primary industry

Resistors (Fixed/Variable/Network) (HDAHANAA)

akta.pro secondary industries

Passive Components (Resistors, Capacitors, Inductors, Ferrites) (IMAGAJAA), Thermal Management Components (Heat sinks, TIMs, fans/blowers, thermal pads) (IMAGAJAL), Cooling & Thermal Solutions (Air/Liquid, fans, thermal paste) (HDACAGAF)

Keywords

• Power resistors
• Brake resistors
• Neutral earthing resistors
• Liquid cooled resistors
• Aluminum housed resistors

Headquarters

HQ city

Rødovre

HQ country

Denmark

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Power Resistor Hardware Sales: Danotherm designs and manufactures power resistors sold as finished products. The company offers both standard product lines and customized solutions. Products range from small rheostats (12W) to large industrial resistors (1450+ kW). Revenue is generated through direct product sales with pricing based on power rating, cooling method, protection class, and customization requirements.
2. Custom Resistor Design and Engineering Services: The company provides extensive customization services including thermal simulations, CAD design, custom resistance values, special connection configurations, and OEM versions. Engineers work with customers throughout the project phases to develop tailored solutions.

Pricing tiers

Go-to-market motion3 records

Distribution channels2 records

Marketing channels5 records

Core offering

Danotherm Electric designs and manufactures high-quality power resistors for demanding industrial applications. The portfolio spans four cooling-based categories — convection cooled (aluminium housed ALPHA, steel tube, steel grid, wire wound, rheostats, ModulOhm), liquid cooled (CBW, WHB, WHBS, WHBSA, WHDN, WHHB series), ventilator cooled (load banks, TRV, traction brake), and heatsink cooled (BI-Alpha, CCH, HSCC-HSAC, HSD-HSF, HSP-HSV, PR, RB). Power ratings range from 12W rheostats to 1450+ kW liquid-cooled units and up to multi-megawatt load banks.

Product overview

Danotherm Electric is a manufacturer of power resistors with over 100 years of experience. Their product portfolio consists of four main cooling-based categories: Convection Cooled resistors (natural air cooled up to 100kW), Liquid Cooled resistors (water/glycol cooled from 6-1450kW), Ventilator Cooled resistors (forced air cooled), and Heatsink Cooled resistors (12W-2500W). The ALPHA series aluminum housed products represent their flagship line with models including CAH-CAV, CAR, CBH-CBV, CBR, CBS, CBT, CCH, CCR, CMQ, CVS, HVB, HVBS, and HVS. Steel-based products include GRT and PCG tube resistors, plus steel grid resistors for filter and neutral earthing applications. Liquid cooled offerings span from compact CBW units to large WHDN tanks. Ventilator cooled products include TRV tube resistors, load banks, and specialized traction brake resistors. The company also provides comprehensive customization services including thermal simulation using customer-specific models, and supports various industries including renewable energy, marine, automation, traction, e-mobility, energy generation, mining, and oil and gas.

Differentiator

Problem solved

Functional benefit

Brands

• ALPHA: Aluminum housed power resistors brand featuring extruded aluminium housing for superior heat conduction. Includes models CAH, CAV, CAR, CBH, CBV, CBR, CCR, CBT, CVS, CBS, CMQ, HVBS, HVB, HVS.

Products and services

• ALPHA Series (Aluminium Housed Resistors) Aluminum housed power resistors featuring extruded aluminium housing with anodized non-corrosive finish, deep fins for improved heat dissipation, UL-approved components, and power ratings from 42W to 4350W with IP00 to IP65 protection ratings. Models include CAH, CAV, CAR, CBH, CBV, CBR, CCR, CBT, CVS, CBS, CMQ, HVBS, HVB, and HVS.
• Steel Tube Resistors (GRT, PCG) High-power steel tube resistors with active wire inside stainless steel tubes filled with magnesium oxide, rated 1-32 kW and IP65 for harsh industrial environments including marine and harbor applications.
• Steel Grid Resistors Compact, reliable steel grid resistors for filter, brake, and neutral earthing applications. Available for voltages from 1000VAC/1400VDC up to 36 kV grid systems, with power ratings from 3-120 kW.
• Rheostats Variable resistors for controlling current in moderate power circuits, rated 12-200W with power ratings up to 7x nominal for 5 seconds. Offered as replacement parts; not recommended for new designs.
• ModulOhm Metal-element low-ohm resistors in band or wire form for through-hole PCB mounting, rated 1-2.4W with current capability 0.63A-20A. Used in current measuring circuits for power supplies and regulators.
• Liquid Cooled Resistors (CBW, WHB, WHBS, WHBSA, WHDN, WHHB) High-power liquid cooled resistors using water or glycol coolant for heat dissipation, ranging from 6 kW to 1450 kW with IP50 to IP66 protection ratings. Includes aluminum or steel housings with AISI304 or AISI316 materials for harsh environments. The WHBSA variant is tailored for hybrid/electric buses and trucks with up to 20-year service life.
• Ventilator Cooled Resistors (Load Banks, TRV, Traction Brake) Forced air cooled resistors including load banks (few kW to MW range), TRV steel tube resistors (50-275 kW) with up to 7x overload capacity and IP65/IP66 ratings, and traction brake resistors (20-2400 kW) for railway systems compliant with IEC 60322 and IEC 61373.
• Heatsink Cooled Resistors (BI-Alpha, CCH, HSCC-HSAC, HSD-HSF, HSP-HSV, PR, RB) Heatsink cooled power resistors using aluminum housing as heat exchanger, ranging from 12W to 570W (up to 2500W with liquid-cooled plate) with working voltages from 265 to 5000 VAC. Includes ultra-compact BI-Alpha (4.3-5.25mm height), thick film PR resistors for filter and snubber applications, and other variants.
• Custom Resistor Design and Engineering Services Thermal simulation and custom resistor design services using proprietary thermal models and P-Spice compatible simulation software to optimize resistor selection for specific applications including pulse loads, braking, and energy dump scenarios. Engineers work with customers throughout project phases to develop tailored solutions.

Quantifiable outcome

• Resistors can handle overload factors from 4x to 130x nominal power ratings for 5-second pulses
• +3 more outcomes

Segments8 records

Ideal customer profiles8 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• ATE Electronics SrlcoreStrategic or Co-development Partner · 1 January 2016ATE Electronics Srl (Italy) joined Danotherm through acquisition in 2016. ATE continues developing, producing, and selling power resistors under its own brand, expanding Danotherm's manufacturing footprint near Milan and Turin.
• Global Distributor NetworkcoreChannel Partner/ Reseller/ DistributorDanotherm has established distributors in 46 countries worldwide. These distributors provide technical support and logistic demand fulfillment, enabling local market access across Europe, Americas, Asia, and other regions.

Scale indicators5 records

Recent moves10 records

Expansion highlights5 records

Market position

Competitive moat5 records

Key risks6 records

Customer concentration

• LinkedInlinkedin.com/company/danotherm-electric

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about Danotherm Electric