Bächli AG: Efficiency meets innovation

BTOB RAIL MAG 2025

Bachli AG - Where Experience Meets Innovation

For 75 years, Bächli AG has stood for outstanding quality, innovation, and reliability in the railway industry. As a traditional Swiss company, Bächli is a leading developer and manufacturer of electrical components for railway vehicles – particularly in the field of winding goods such as transformers and chokes. The broad portfolio is complemented by customized system boxes and retrofit solutions. In its anniversary year 2025, Bächli AG presents itself as a reliable and forward-looking partner for the international rail industry.

75 Years of Expertise – Swiss Precision in every Detail

Founded in 1950, Bächli AG started as a specialized manufacturer of electrical components and has continuously evolved ever since. Today, the company is one of the leading providers of winding goods in Europe and beyond. From the very beginning, winding goods – particularly transformers and chokes – have been at the core of Bächli’s product offering.

These key components perform essential functions in railway vehicles: transformers ensure the reliable power supply to various subsystems, while chokes help to minimize electrical interference and enhance operational safety. Bächli AG designs and manufactures these components individually, precisely tailored to meet the specific requirements of its customers – whether for locomotives, multiple units, metro vehicles, or special applications.

In addition to the production of these essential components, Bächli has developed extensive expertise in the engineering and optimization of winding goods.

Retrofit and New Constructions – Tailored Solutions for Every Generation of Rolling Stock

With the dynamic development of the rail industry, the demands on existing fleets are constantly increasing. In addition to extending service life, aspects such as energy efficiency and safety are becoming increasingly important. Bächli AG offers retrofit and repair solutions specifically aimed at the reproduction of existing winding goods, optimized designs, or the modernization of existing components.

Key focuses include the renewal or replacement of electrical components. Especially for transformers and chokes, Bächli offers customized retrofit solutions that meet all current technical standards and ensure long-term operational safety. In doing so, not only are mechanical and electrical interfaces precisely adapted, but improvements in weight, efficiency, and maintainability are often achieved as well.

In the area of new vehicle construction, Bächli delivers complete solutions, starting from the concept development and prototype production through to series manufacturing. Transformers and chokes are an integral part of the overall system architecture, developed specifically for each vehicle type and operational environment. Close cooperation with vehicle manufacturers and operators ensures solutions that meet the highest standards in terms of performance, safety, compliance, and durability.

One of Bächli AG’s clear competitive advantages is its ability to offer both individual components and complete electrical systems from a single source. This not only facilitates seamless integration but

Bächli System Boxes: Modular, Compact, and Powerful

A central element of Bächli’s portfolio is the individually developed system boxes – compact, pre-configured electrical units precisely tailored to the customer’s specific requirements. At the heart of these boxes are Bächli AG’s core products: transformers or chokes, complemented by all necessary additional components such as fans, filters, protective devices, and cabling systems.

These comprehensive solutions offer decisive advantages: thanks to their modular construction and the optimal coordination of all integrated components, the system boxes are almost maintenance-free and exceptionally easy to install. Operators benefit from shorter commissioning times, reduced maintenance costs, and significantly enhanced operational reliability.

Thanks to Bächli AG’s extensive system expertise, the system boxes are perfectly adapted to the surrounding vehicle systems. This guarantees seamless integration into existing vehicle architectures and ensures reliable operation in daily use – even under challenging conditions such as vibrations, temperature fluctuations, or humidity.

All Bächli system boxes are developed and manufactured in accordance with the applicable international railway. They undergo extensive testing, including shock and vibration tests, to ensure the highest levels of reliability and durability even under extreme operating conditions.

Whether for new builds or retrofitting projects, Bächli’s individually designed system boxes stand for maximum efficiency, highest operational safety, and uncompromising quality in railway electronics.

In combination with its own transformers and chokes, Bächli's system boxes form a powerful overall solution designed for ultimate reliability and efficiency. Each box is developed, tested, and documented according to customer specifications, fully complying with international norms and industry-specific standards.

The modular design also allows for easy scalability and adaptation to different vehicle concepts. In addition, system boxes significantly reduce vehicle wiring effort, thereby shortening commissioning times and improving maintainability.

Whether for new vehicles or retrofit projects – Bächli’s system boxes guarantee high operational reliability even under themost demanding conditions, such as vibration, extreme temperatures, or humidity.

Smart-E-Power® - Energy-efficient transformers

In addition to the compact design, we also offer particularly energy-efficient transformers. Our Smart-E-Power® product line is designed to achieve maximum efficiency. These transformers minimise energy losses, which reduces operating costs and lowers CO₂ emissions. High-quality materials, precise calculations and careful manufacturing help these transformers achieve efficiencies of over 99%.

Why buy Smart-E-Power transformers from Bächli AG?

1.cost savings in life cycle costs:

The high efficiency of our transformers leads to lower operating and life cycle costs. Companies can realise significant savings by reducing energy losses and maintenance costs.

2. reliable performance:

The longevity and reliability of Smart-E-Power® transformers means less downtime and a constant supply of high-quality energy.

3. sustainability:

With a focus on environmentally friendly technology, Bächli transformers help to achieve sustainability goals and reduce the ecological footprint.

4.technological innovation:

The advanced control and monitoring systems of the Smart-E-Power® transformers enable proactive maintenance and optimisation.

5. customised solutions:

Bächli AG offers customisation to ensure that transformers are perfectly matched to the customer's specific needs and requirements.

6. complete product documentation:

Nowadays, it is essential that products have complete accompanying documentation that complies with standards. Bächli AG offers its customers high-quality and complete documentation.

To summarise, the compact and smart e-power transformers from Bächli AG offer a combination of high efficiency, reliability, weight reduction, space saving and environmental friendliness. By integrating these transformers into a railway power box, the customer has the optimum solution. These strengths make them an excellent choice for companies looking for sustainable, cost-efficient, low-maintenance, high-performance and reliable solutions. Discover how our innovative chokes, transformers or filters can take your new train developments to the next level.