Siemens cooperates with Envalior
From frying oil to coupling relay
Siemens Smart Infrastructure has launched a new series of coupling relays whose plastic housing consists of 70 percent bio-based material obtained from biomass waste.
The plastic 'Akulon K225-KS B-MB' was developed by Envalior in collaboration with Siemens. The starting material for the plastic is used cooking oil (UCO), which is produced after frying in the food industry, restaurants, snack bars and households. As UCO is no longer suitable for human or animal consumption, it does not compete with food or animal feed production. While UCO is mainly used for biodiesel, Envalior uses it for the production of engineering plastics using a mass balance approach, thus avoiding incineration. Envalior is a global supplier of high-performance engineering materials.
"Working with Envalior to develop this bio-based plastic is an important step in driving the use of more sustainable materials in our electrical products," said Andreas Matthé, CEO Electrical Products at Siemens Smart Infrastructure.
The new SIRIUS 3RQ4 coupling relay offers three variants for a wide range of industrial requirements.
- Variant with integrated relay output:
Robust for harsh environments and safety-critical applications. ATEX-certified, with safety-related characteristic values (B10d). Optionally with gold-plated contacts for very low currents and coated PCBs for railroad applications. - Plug-in version:
For quick relay changes during operation, also optionally with gold-plated contacts. - Variant with semiconductor output:
Silent, extremely durable and maintenance-free. Ideal for frequent switching; up to 6 A switching capacity, comparable with conventional relays.
Akulon K225-KS B-MB from Envalior is a bio-based, halogen-free, flame-retardant polyamide 6 grade for injection molding. The more sustainable material is characterized by a significantly improved environmental profile, high heat resistance and chemical resistance and is used in many applications in electrical engineering and power distribution.











