Siemens AG Launches Sustainable SIRIUS 3RQ4 Coupling Relay Series for Industrial Automation
- Siemens introduces the SIRIUS 3RQ4 coupling relay series, highlighting its commitment to sustainability in industrial automation.
- The relay's housing is made from Akulon® plastic, containing 70% bio-based content from non-food biomass waste.
- Siemens aims to lead the industry in sustainable practices by integrating eco-friendly materials into its product offerings.

Siemens Embraces Sustainability with New Coupling Relay Series
Siemens Smart Infrastructure recently unveils the SIRIUS 3RQ4 coupling relay series, a significant development in the realm of industrial automation that underscores the company's commitment to sustainability. This innovative product line includes three distinct variants designed to cater to various industrial applications. A standout feature of the SIRIUS 3RQ4 is its housing, which utilizes Akulon® K225-KS B-MB plastic. This material is composed of 70% bio-based content derived from biomass waste, specifically used cooking oil (UCO). This choice not only promotes sustainability but also demonstrates Siemens' strategic direction toward incorporating eco-friendly materials in its product offerings.
The collaboration with Envalior, a recognized leader in sustainable solutions, plays a pivotal role in the development of the SIRIUS 3RQ4. The Akulon® plastic delivers exceptional heat and chemical resistance, ensuring the relay performs reliably in demanding industrial environments. Importantly, the UCO used in this plastic is not suitable for human or animal consumption, which means its utilization does not compete with food production. This approach further enhances the sustainability credentials of the product, aligning with Siemens’ vision of reducing waste while fostering innovative manufacturing practices.
Andreas Matthé, CEO of Electrical Products at Siemens Smart Infrastructure, highlights this collaboration as a crucial step towards the integration of sustainable materials in their electrical products. The SIRIUS 3RQ4 coupling relay not only reflects a commitment to eco-friendly technology but also sets a benchmark for the industry by showcasing the potential of recycled materials in engineering plastics. As the demand for sustainable manufacturing solutions continues to grow, Siemens positions itself as a leader in providing reliable and environmentally conscious products that meet the evolving needs of the industrial sector. By embracing innovative materials and fostering strategic partnerships, Siemens is paving the way for a more sustainable future in industrial automation.
In addition to the launch of the SIRIUS 3RQ4, Siemens demonstrates a broader commitment to sustainability within its operations. The company actively seeks to enhance its product portfolio with solutions that minimize environmental impacts. This initiative is indicative of a larger trend in the industrial sector, where companies increasingly prioritize environmentally responsible practices.
The introduction of the SIRIUS 3RQ4 coupling relay signifies not only a technological advancement but also a cultural shift within Siemens towards prioritizing sustainability in product development. As industries around the world grapple with environmental challenges, Siemens’ proactive approach positions it to lead the charge in developing sustainable solutions that benefit both the environment and operational efficiency.