Original Danotherm products
Authorized supplier
Danotherm Power resistors
Reliable power resistors for demanding applications
AstrolKWX supplies Danotherm high-power resistors for industrial, renewable energy, e-mobility, marine and grid applications
Explore our products
Design and Manufacture of Quality Power Resistors
With roots dating back to 1919, the Danish company Danotherm Electric A/S is known worldwide for high-quality design and manufacture of A-quality power resistors. Danotherm’s high-power resistors are engineered to optimize efficiency and ensure reliability, enhancing operational performance across demanding applications. The portfolio supports a wide range of markets: e-mobility, industrial automation, marine, and renewable energy, with typical uses including snubber resistors for semiconductors, voltage dividers, and load/discharge resistors. In wind turbines, Danotherm solutions also serve as filter and high-energy dump resistors for Low Voltage Ride Through (LVRT) applications.
Danotherm is a member of the Swedish NIBE Industrier AB — NIBE Group. The main factory is located in Copenhagen, Denmark, with additional production in Stargard, Poland, and two facilities near Milan and Turin, Italy.
Schedule a Technical Online Meeting with Peter
If you have DC-related questions, need help with power-electronics projects, or require support with complex thermal or protection challenges, this session with one of our power electronics consultants will be valuable.
We Supply Danotherm High-Power Resistors
Liquid-cooled resistors
for very high continuous power and compact footprints (e.g., cooling with water/ionized water; glycol options for extended temperature range).
Air-cooled resistors
available in both forced-air and natural-convection versions.
Brake resistors
designed for sustained braking energy in electric transport, marine drives, and heavy industrial duty.
Filter resistors
for harmonic filtering in converters and grid interfaces.
High-energy dump / discharge resistors
for safe energy dissipation during faults or emergency stops.
Snubber resistors
to protect power semiconductors in high-dv/dt environments.
Neutral Earthing Resistors (NER)
for MV/HV grids to limit fault currents and improve protection selectivity.
Excelling at Customer-Specific Solutions
Our products are built for the most demanding environments and cover numerous industry-specific requirements. We focus on delivering reliable, cost-effective, and optimized power resistor solutions for any need, whether it is a catalog product adapted to precise specifications or a completely new design. Together, Astrolkwx and Danotherm specialize in customizing power resistors, mechanically and electrically, to fit your application (including housing materials such as aluminum or stainless steel, IP ratings, thermal sensors, and interface options).
Schedule a Technical Online Meeting with Peter
If you have DC-related questions, need help with power-electronics projects, or require support with complex thermal or protection challenges, this session with one of our power electronics consultants will be valuable.
Contact our brand representative
Recent news items featuring Danotherm subjects
One ground fault can shut down your entire operation. Are you protected?
In this article, Anju Upadhyay explains how Neutral Grounding Resistors (NGRs) enhance ground fault protection by limiting fault current and improving system safety. The article also compares HRG and LRG grounding methods and discusses their applications across industrial and critical power systems.
Resistive load banks for MW-scale microgrid testing
In this article, Peter van den Berg explains how resistive load banks use high-power resistors to create controlled and repeatable electrical loads. He explores load-step resolution, thermal management, air- and liquid-cooled resistor technologies, and how MW-scale load banks can be used to test the performance and reliability of modern DC microgrids.
Danotherm is used in the following applications
Astrolkwx and Eekels
Astrolkwx has been a partner and supplier of power electronics components for Eekels for numerous projects in the fields of marine and offshore.
