PVT4FW4SS331 is an illuminated momentary pushbutton switch featuring a stainless steel actuator and housing with a green LED illumination ring. The switch operates as a single-pole single-throw (SPST) momentary contact configuration with a contact rating of 50mA at 24VDC and silver contact material rated for 500,000 make-and-break cycles at full load. Key technical specifications include an operating temperature range of -25°C to +55°C, contact resistance of 100mO maximum, insulation resistance of 1000 MO minimum, and dielectric strength of 250 VAC for 1 minute. The switch features an M19 x 1.0 thread for panel mounting with a recommended panel cutout diameter of 19.00 mm and accommodates panel thicknesses of 1–5 mm, with an IP65 ingress protection rating. This switch is ideal for industrial control panels, machinery interfaces, and applications requiring visual feedback with reliable momentary switching action.