The ULV4F2BSS541 is an illuminated pushbutton switch featuring a blue LED indicator and stainless steel construction designed for panel-mount applications. It is rated for 3A 250VAC with an electric life of 50,000 make-and-break cycles and silver contact material with a maximum contact resistance of 50mO at 1A/2VDC. The switch operates over a temperature range of -20°C to 55°C, provides IP67 and IK40 ingress protection, and includes dual LED indicators (LED 1 and LED 2) each rated at 20mA @ 5VDC with an actuation force of 2.5 ± 1.0 N. This switch is ideal for industrial control panels, machinery interfaces, and applications requiring reliable illuminated feedback in harsh or wet environments.