The W48-1-RB-N-BK-B is a mechanical momentary pushbutton switch featuring a round black bezel with no LED illumination and bushing-mount installation. The switch employs SPST-NO-DB circuitry with a 2.3 mm nominal button travel and 3 N (306 g) nominal operating force, rated for 1,000,000 mechanical cycles in momentary mode. Electrically, it is rated for 10 mA at 12 VDC with gold-plated contacts, 50 mO maximum initial contact resistance, 1,000 VAC dielectric strength, and 1 GO insulation resistance. The device operates across -40 °C to +85 °C and features IP67 actuator ingress protection, making it suitable for industrial control panels, equipment interfaces, and applications requiring reliable momentary switching in harsh environments.