Transformers are primarily used to adjust the voltage level. They also enable new mains configurations to be formed. This allows downstream systems to be designed for the same mains configuration and voltage in all cases, regardless of where in the world they are operated. Just one autotransformer, that is considerably smaller than transformers with the same output, is required for easy and effective voltage adjustments. BLOCK’s wide standard range of power, control, safety, isolating and autotransformers provides our customers with the right choice when building their systems.

Always the right transformer for your application

Difficult installation conditions or complex electrical requirements extend the application area for BLOCK transformers. Thanks to its coordinated components and 80 years of experience, BLOCK provides the right solution for all areas of industry. All solutions are of course certified and comply with the corresponding standards.


We have been developing and producing transformers in accordance with European and American standards for 80 years. Our transformers are subject to 100% testing and experience quality from a single source at all stages of production. This makes us a reliable partner with the highest quality standards.


Our customers’ application areas are extremely varied, which is why we provide transformers in a wide range of designs. We provide expert advice on the use of BLOCK standard transformers or customer-specific configurations. Whether for serial production or specific applications, we deliver transformers that are perfect for any customer requirement, irrespective of the quantity required.


Sometimes a quick solution is needed, e.g. with a system outage or for changes at short notice. At times like these, it helps to have a wide standard range available from the warehouse. Our Development Center and production facility at our headquarters give us the flexibility we need to act on customer projects in order to ensure comprehensive planning.

Developed for the control cabinet

Constructing a control cabinet often requires exceptional solutions. The significant amount of heat generated from the numerous system components in a highly compact space really tests the stamina of these components. Together with our customers, we have therefore developed a 3-phase transformer/reactor combination that guarantees the best possible heat exchange performance through its special design featuring cooling slots with integrated winding. Integrated forklift slots make the product particularly easy to transport in accordance with customer requests.

"With our transformer-reactor combination, we have developed a high-performance component for our customers, which is perfectly designed for conditions in wiring cabinet construction."

Jan-Hendrik Pätz, Product Manager Transformers

We will develop and design your own individual product solution to meet your specific requirements - tested, certified, and ready for immediate use

We can help you!