
Siemens and Envalior develop bio-based housing for Sirius 3RQ4
Siemens Smart Infrastructure introduced Sirius 3RQ4 coupling relays with housings made from Akulon K225-KS B-MB, a PA6 grade from Envalior containing 70 percent bio-based content sourced from used cooking oil via mass balance. The series offers three variants and meets Siemens EcoTech criteria.