The IDEC HW1B-A4F22R-K is a robust 40mm red mushroom push button designed for maintained operation. It features 2 Normally Open (NO) and 2 Normally Closed (NC) contacts, ensuring versatile control options within circuits. The button's tamperproof construction and finger-safe IP20 contacts prioritize safety and reliability. Compliant with EN60947-5-5 and SEMI S2 standards, this emergency stop push button from the HW series is engineered to meet rigorous industry requirements.