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Press Release10 October 2025Smart InfrastructureZug, Switzerland / Düsseldorf, Germany
From frying oil to coupling relays: Siemens and Envalior collaborate on more sustainable electrical products
Process steps – from more sustainable raw material to finished coupling relays
“Collaborating with Envalior to create this bio-based
plastic is an important step towards advancing the use of more sustainable
materials in our electrical products. We are pleased to work with Envalior as
another strong partner on our journey towards a more environmentally friendly
portfolio,” says Andreas Matthé, CEO of Electrical Products at Siemens Smart
Infrastructure.
The new SIRIUS 3RQ4 coupling relay comes in
three versatile variants for a wide range of industrial requirements.
The first variant with integral relay output
is specially designed for harsh environmental conditions, as well as for areas
with specific safety requirements. These relays have safety-ready
characteristic values (B10d values) and are also approved for use in
potentially explosive atmospheres (ATEX-certified). This variant is optionally
available with gold-plated contact elements for switching very low currents, or
with printed circuit boards with a protective coating, which are suited for
railway applications.
As a second variant, plug-in coupling relays
are available for applications that require quick relay replacement during
operation. They are also available as an option with gold-plated
contacts.
For applications requiring very fast,
soundless and frequent switching, Siemens offers a third variant with
semiconductor output. As it has a virtually infinite service life, it is used
where replacing conventional relays can be expensive and time-consuming.
Siemens has been able to increase the switching capacity of these semiconductor
variants to up to 6A, enabling them to match the performance of conventional
elementary relays.
The SIRIUS 3RQ4 coupling relays are designed
for more sustainability throughout their entire lifecycle, from development to
the end of service life and meet the strict criteria of the Siemens EcoTech
label. This includes 33 percent lower energy losses in the semiconductor
variant compared to previous versions as well as eliminating problematic
materials such as halogens or PFAS. In addition, the product can be easily
dismantled and recycled at the end of its life. Envalior’s Akulon®
K225-KS B-MB, a bio-based, halogen-free, flame-retardant polyamide 6 grade plastic
for injection molding, is the ideal choice for these coupling relays. This more
sustainable material is characterized by a significantly improved environmental
profile, high heat resistance, and excellent chemical resistance and is used in
many electrical engineering and power distribution applications. “At Envalior,
we are proud to have partnered with Siemens in the development of the SIRIUS
3RQ4 coupling relay series. A key success factor in this project was achieving
excellent flow behavior in thin-wall designs and a UL94 V-0 rating at just 0.4
mm thickness, while simultaneously achieving an outstanding green share from
bio-waste sources but at prime quality,” says Dr. Marc Rudolf, Global Key
Account Manager, Envalior.
The new SIRIUS 3RQ4 coupling relays have a
space-saving slim-line design for optimized use in control cabinets. They have
been designed and intensively tested for use in combination with Siemens
controllers. Their fully automated production at the Siemens plant in Amberg
shortens the supply chain in the German and European markets. The coupling
relays are shipped in more sustainable cardboard boxes in standard multi-piece
packaging. The operating instructions and all relevant information can be
accessed electronically from an ID link on the device.
In addition to the manufacture of bio-based
products, Envalior also focuses on renewable energies. In 2024, Envalior
covered over 50 percent of its global electricity needs with renewable
energies. By 2030, Envalior aims to reduce emissions by another 35 percent.
This will be achieved through a variety of measures, including expanding
renewable energies to 100 percent by 2030, implementing local emission
reduction initiatives, and switching to climate-friendly heat sources. Envalior
invests in renewable energies close to its production sites around the world.
The new SIRIUS 3RQ4 coupling relay comes in three versatile variants for a wide range of industrial requirements
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Siemens Smart Infrastructure (SI) is shaping the market for intelligent, adaptive infrastructure for today and the future. It addresses the pressing challenges of urbanization and climate change by connecting energy systems, buildings, and industries. SI provides customers with a comprehensive end-to-end portfolio from a single source – with products, systems, solutions, and services from the point of power generation all the way to consumption. With an increasingly digitalized ecosystem, it helps customers thrive and communities progress while contributing toward protecting the planet. To protect this journey, we foster holistic cybersecurity to ensure secure and reliable operations. Siemens Smart Infrastructure has its global headquarters in Zug, Switzerland. As of September 30, 2024, the business had around 78,500 employees worldwide.
Siemens AG (Berlin and Munich) is a leading technology company focused on industry, infrastructure, mobility, and healthcare. The company’s purpose is to create technology to transform the everyday, for everyone. By combining the real and the digital worlds, Siemens empowers customers to accelerate their digital and sustainability transformations, making factories more efficient, cities more livable, and transportation more sustainable. A leader in industrial AI, Siemens leverages its deep domain know-how to apply AI – including generative AI – to real-world applications, making AI accessible and impactful for customers across diverse industries. Siemens also owns a majority stake in the publicly listed company Siemens Healthineers, a leading global medical technology provider pioneering breakthroughs in healthcare. For everyone. Everywhere. Sustainably.
In fiscal 2024, which ended on September 30, 2024, the Siemens Group generated revenue of €75.9 billion and net income of €9.0 billion. As of September 30, 2024, the company employed around 312,000 people worldwide on the basis of continuing operations. Further information is available on the Internet at www.siemens.com.
Envalior is a global leader in Engineering Materials with over 4,000 employees worldwide. It was established in 2023 through the merger of Lanxess Performance Materials and DSM Engineering Materials. With a long track record of customer-driven innovation, Envalior specializes in developing Sustainable and High-Performance Engineering Materials, including PA6, PA66, PBT, PA46, PPS, TPC, PET, PA4T, PA410, and Thermoplastic Composites. Focus markets include Mobility, Electronics & Electrical, and Consumer Goods. For more information, visit www.envalior.com.
Contact
Christian S. Wilson
Siemens Smart Infrastructure
+49 172 138 5608