With BLOCK USA, BLOCK has maintained a direct presence in the American market for many years. Located in Franklin Park near Chicago, Illinois, the site combines sales, warehousing, and production under one roof, enabling short communication channels and close, reliable customer support. BLOCK USA has been operating at its current location since 2015 and offers 27,000 square feet of production space.
As part of the internationally active BLOCK Group, BLOCK USA offers a broad portfolio of transformers, power supplies, electronic circuit breakers, reactors, and EMI filters. Our U.S. team is backed by our German headquarters in Verden, where 80 engineers and technicians work in research and development. Extensive in-house manufacturing capabilities in Germany complement our local production and provide additional resources for demanding projects.
Our portfolio includes standard products and custom-made solutions for a wide range of applications, such as automation and data centers. Depending on the application, different requirements take priority, from high performance and compact design to robust construction and the reliable supply and protection of sensitive electrical components.
Our portfolio includes standard products and custom-made solutions for a wide range of applications, such as automation and data centers. Depending on the application, different requirements take priority, from high performance and compact design to robust construction and the reliable supply and protection of sensitive electrical components.
FROM FRANKLIN PARK
WITH LOVE
Production at BLOCK USA is built around precise manufacturing processes and consistent quality standards. From winding and soldering to vacuum impregnation and final testing, each production step is designed to ensure that components meet demanding technical and industrial requirements.
Expanded winding and soldering workstations, additional drying ovens, and an automated testing system have increased our production capacity. A modern vacuum impregnation system further enhances the manufacturing process.
By combining experienced production teams with proven manufacturing and testing processes, BLOCK USA creates products that meet the high quality standards of the BLOCK Group while responding efficiently to the specific requirements of the North American market.
TRANSFORMERS BUILT FOR THE U.S. MARKET
Our comprehensive transformer portfolio includes control, isolating, safety and autotransformers and many more. A particular focus is the CT Series of control transformers, developed specifically for the American market and manufactured exclusively at our Franklin Park facility.
The CT Series is cURus Recognized according to UL 5085-1/-2 and covers 50 to 2,500 VA, with 240/480 Vac or 600 Vac primary configurations and 24 Vac or 120 Vac secondary options, depending on the model. Designed for 50/60 Hz operation, the transformers include voltage selection jumpers on applicable versions. Versions with integrated fuse blocks are also available.
In addition to these standard solutions, BLOCK also develops customized transformers that can be adapted to specific electrical and mechanical requirements. Different voltages, power ratings, designs, connection types, and installation conditions can be considered according to the individual application.
This combination of proven standard products, U.S.-specific transformer solutions, and customized designs allows BLOCK to provide the right transformer for a wide range of applications across the North American market.
POWER SUPPLIES & CIRCUIT BREAKERS FOR
SAFE AND RELIABLE POWER IN THE U.S.
Our power supplies, uninterruptible power supplies and electronic circuit breakers provide coordinated solutions for the safe and efficient supply, distribution, and protection of industrial control systems. Designed for a wide range of applications, the portfolio combines stable power supply with intelligent protection functions to support high system availability and reliable operation.
For the U.S. market, we offer DIN rail power supplies for 24 and 48 Vdc control systems in single- and three-phase versions. The portfolio ranges from compact, cost-efficient models to powerful units for demanding operating conditions. Selected POWER ADVANCED models are cULus Listed to UL 61010 and have NEC Class 2 approval.
Electronic circuit breakers complement the power supply by selectively disconnecting overloaded or short-circuited load circuits, helping maintain power to unaffected circuits. Selected EasyB single- and dual-channel models are certified to UL 508 and UL 2367, with NEC Class 2 approval in the 1 to 4 A range. Appropriately configured channels can supply power-limited circuits for sensors, controllers, and other 24 or 48 Vdc loads.
DC UPS and buffer modules provide backup power during supply interruptions. Together, our electronic components offer a coordinated solution for reliable power supply, distribution, and protection in U.S. industrial applications.
REACTORS & FILTERS FOR RELIABLE POWER QUALITY
ACROSS NORTH AMERICA
Our reactors and filters improve power quality and reduce electrical interference in industrial power and drive systems. The portfolio includes line reactors, motor reactors, sine filters, EMI filters, and harmonic filters to address different power quality and motor protection requirements.
For the U.S. market, a key focus is the LR3 series of line reactors for variable frequency drives. Installed on the input side of a drive, LR3 line reactors reduce current harmonics and limit current peaks. The range includes 480 Vac variants with 3% or 5% impedance for 50/60 Hz operation. The LR3 product line is cULus Listed to UL 508, supporting its integration into North American industrial systems.
By reducing harmonics, voltage stress, electromagnetic interference, and unwanted losses, BLOCK reactors and filters contribute to greater system reliability, longer component lifetime, and efficient operation. This makes them an important part of a stable and reliable power infrastructure for industrial applications across the U.S.
APPLICATIONS ACROSS U.S. INDUSTRIES
- Machinery, Automation & Material Handling: Control transformers and 24 Vdc systems for machine controls, conveyors, packaging equipment, and automated warehouses.
- Data Centers: Reactors and filters for VFD-driven cooling equipment, complemented by power supplies and circuit protection for facility control and monitoring systems.
- Oil & Gas: Line reactors and harmonic filters for pump and compressor drives, together with power supplies for associated control systems.
- Food & Beverage: Power supplies and circuit protection for processing and packaging machinery, plus reactors and filters for mixers, conveyors, and refrigeration drives.
- Energy & Renewables: Transformers, power supplies, and filters for power conversion, auxiliary circuits, and plant control systems.
- Water & Wastewater: Power quality components for pumping and aeration drives, with 24 Vdc supplies for treatment and monitoring equipment.
SOLUTIONS THAT GO BEYOND THE PRODUCT
We offer a range of solutions developed specifically for the technical requirements of the North American market. These include products for 480 V and 600 V applications, 60 Hz systems, and U.S.-specific voltage configurations, as well as solutions designed to meet relevant UL requirements.
Alongside standard products, we develop custom-made solutions tailored to individual electrical and mechanical requirements, including special voltages, power ratings, designs, and connection options. This flexibility allows us to address the specific needs of machinery, automation, power distribution, and other industrial applications across North America.
Products labeled “Assembled in USA” are manufactured locally at the BLOCK USA facility in Franklin Park, Illinois. Other products may be available from BLOCK USA or specifically designed for North American requirements while being manufactured at another BLOCK production site. This distinction ensures a clear and transparent presentation of the U.S. portfolio.