Manufacturer of contactor relays, relays and resistors for DC power switching applications
Durakool (Willow Technologies Ltd)
Copthorne, West Sussex (UK) · Elkhart, IN (USA)New on Amplifa
About Durakool
Durakool is a manufacturer of switching, resistor and sensor solutions, originally founded in 1935 to manufacture switching devices for power generation in industrial and energy automation systems. The product portfolio includes HVDC and LVDC contactor relays (up to 1000VDC and 2000A, CHV, DEVR, DHVC, DSC, DLVC series), electromechanical relays (PCB, plugin, signal and HVDC types, DC, DG, DM, DX, DTC series), pre-charge/discharge resistors (XV1–XV6, 100W, 10Ω–250Ω, ±0.5%) as well as relay sockets and mounting brackets. The focus is on applications in electromobility, battery storage, charging infrastructure, renewable energy and industry. Contacts are made from oxygen-free copper or composite contact rivets; HVDC contactors use ceramic inert-gas contact chambers, and resistors use aluminium housings with non-inductive windings. Sales locations are Willow Technologies Ltd in Copthorne (UK) and American Electronic Components Inc. in Elkhart, IN (USA); distribution is handled worldwide via distributors.
- Site
- RH10 3LH Copthorne, West Sussex
- Processes
- Design and manufacture of HVDC/LVDC contactor relays (up to 1000VDC/2000A, e.g. CHV series, DSC, Design and manufacture of electromechanical relays (PCB, plugin, signal, HVDC relays, series, Design and manufacture of pre-charge/discharge resistors (XV1–XV6, 100W, 10Ω–250Ω, tolerances, Design and manufacture of relay sockets as well as LVDC mounting brackets, Design, manufacture and distribution of sensors, relays, switches and electromechanical switching, Supply of specialised electronic products and components, engineering and, Technical consulting and application support by the engineering team (>100 years of experience in, Technical consulting and application support
- Materials
- Oxygen-free copper (contacts), Ceramic (inert-gas contact chamber), Aluminium (resistor housing), Copper (contact rivets, composite construction with contact layer), Oxygen-free copper, Copper composite contact rivets, Ceramic, Aluminium
- Certificates
- ISO 9001:2015, ISO 14001:2015
- Founded
- 1935
- 01
Engineering & Design
- 02
Technical consulting/Application support
- 03
Manufacturing/Assembly of switching devices
- 04
Technical documentation
- 05
Distribution via distributors worldwide
Materials & Technologies
Oxygen-free copper
Contact material for relay and contactor contacts with low contact resistance.
Copper composite contact rivets
Contact rivets with bonded contact layer for relay contacts.
Ceramic
Inert-gas contact chamber in HVDC contactor relays.
Aluminium
Housing material of the pre-charge/discharge resistors.
Locations
Copthorne
GBHeadquarters (Willow Technologies Ltd)
Elkhart, IN
USLocation (American Electronic Components Inc.)
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Design and manufacture of HVDC/LVDC contactor relays (up to 1000VDC/2000A, e.g. CHV series, DSCAssembly | – | – | – | – | Oxygen-free copper (contacts), Ceramic (contact chamber), Aluminium (housing) |
| Design and manufacture of electromechanical relays (PCB, plugin, signal, HVDC relays, seriesAssembly | – | – | – | – | Copper (contact carrier/contact rivets), Contact material (bonded contact materials on |
| Design and manufacture of pre-charge/discharge resistors (XV1–XV6, 100W, 10Ω–250Ω, tolerancesAssembly | ±0.5% | – | – | – | Aluminium (housing) |
| Design and manufacture of relay sockets as well as LVDC mounting bracketsAssembly | – | – | – | – | – |
| Design, manufacture and distribution of sensors, relays, switches and electromechanical switchingAssembly | – | – | – | – | – |
| Supply of specialised electronic products and components, engineering andEngineering | – | – | – | – | – |
| Technical consulting and application support by the engineering team (>100 years of experience inEngineering | – | – | – | – | – |
Additional services
Quality
Durakool products are RoHS and REACH compliant; the locations are certified to ISO 9001:2015, with one location additionally certified to ISO 14001:2015. The company pursues a policy of continuous improvement.
| Evidence | Copthorne | Elkhart, IN |
|---|---|---|
| ISO 9001:2015 | ||
| ISO 14001:2015 |
History
- 1935
Founding for the manufacture of switching devices for power generation in industrial and energy automation systems.
- 2021
Reissuance of the ISO 9001:2015 certificate for Willow Technologies Ltd (valid until 12.09.2024).
- 2023
Expansion of the HVDC product portfolio and product launch at the Battery Show Stuttgart.
- 2024
Trade fair presence at the Detroit Battery Show.
- 2025
New HVDC contactor with 800A @ 1500VDC; trade fair appearances including iVT Germany, Teknologia Helsinki, EV Charge Istanbul, Energy Taiwan, ACT Expo.