The HW1B-Y2F01-R is a 22mm IEC-style push-pull E-stop pushbutton switch with a plastic bezel, designed for emergency stop applications requiring momentary action with 1NC (one normally closed) contact configuration. This switch features a yellow button color (Y) and finger-safe spring-up contacts (F01 designation) that provide IP20 protection, meeting EN60947-5-5 and SEMI S2 standards for global safety compliance. The push-pull mechanism ensures tamperproof operation where contact state changes cannot occur through teasing or floating the operator, making it ideal for industrial control systems, machinery safety circuits, and emergency shutdown applications where reliable, fail-safe contact action is critical.