BLOCK

🇩🇪 Germany Industrial Components

Transformers, power supplies, reactors, EMI filters, electronic circuit breakers and power quality components.

BLOCK Transformatoren-Elektronik GmbH is a German power electronics and transformer manufacturer based in Verden. Founded in 1939 by Alfred Block, the company develops voltage and power-quality solutions for industrial and technical applications. BLOCK is known for transformers, power supplies, reactors and EMI filters, with a strong focus on in-house development, production, testing and customisation. The company serves customers in mechanical engineering, drive technology, rail technology, regenerative energy, intralogistics and control cabinet engineering.

Products and applications

BLOCK’s portfolio includes transformers, switched-mode power supplies, uninterruptible power supplies, reactors, EMI filters, PCB transformers, electronic circuit breakers, redundancy modules, power quality products and application-specific voltage solutions. Its products are used in machine building, drive technology, medical technology, wind power, railway technology, solar energy, intralogistics, control cabinet engineering and applications where reliable voltage conversion, filtering, protection and power supply are required.

Product Categories

Transformers

Chokes & Inductors

Switching Power Supplies

EMC Filters

Sine Wave Filters

Product Lines & Series

USTE/UST Series - Universal Safety Transformers
PEL Series - Switching Power Supplies
PVA/PVS Series - DIN Rail Power Supplies
LL Series - Line Chokes
HLD Series - Motor Chokes
HFE Series - EMC Filters

Products & Components

Single-phase transformersThree-phase transformersIsolation transformersAutotransformersControl transformersToroidal transformersLine chokes (single and three-phase)Motor chokesdU/dt chokesSine wave filtersOutput chokesEMC input filtersEMC output filtersDIN rail switching power supplies (12V, 24V, 48V)Open frame power suppliesRedundancy modulesBuffer modules (DC-UPS)LED drivers

Solutions & Applications

Complete power supply solutions for control cabinetsEMC-compliant drive system configurationsCustom transformer and choke designMotor-friendly VFD output filteringUninterruptible DC power supply systems

Industries Served

Machine BuildingControl Cabinet ConstructionIndustrial AutomationRenewable EnergyBuilding TechnologyMedical TechnologyMarine & OffshoreRailway

Technologies & Expertise

High-efficiency transformer core designCompact DIN rail power supply technologySine wave filter technology for VFDsAdvanced EMC filteringWide-range input switching power supplies

Certifications & Standards

ISO 9001:2015 ISO 14001:2015 UL Listed CSA Certified VDE Certified CE Marking ENEC Certified GL/DNV (Marine approved) ATEX (selected products)

Company facts

Headquarters: Verden, Germany
Founded: 1939
Employees: 700 employees worldwide
Ownership: Owner-managed company

Visit website Email +49 4231 678-0

Profile transparency

Data status: Publicly researched profile
Sources: Official website, public company and product pages
Last reviewed: April 2026

Publicly researched profile. Supplier information is based on publicly available company and product information and can be corrected, claimed, or removed on request.

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