The 35-400 is a miniature pushbutton switch designed for general-purpose switching applications. It features a normally open (NO) single-pole single-throw (SPST) circuit configuration with electrical ratings of 0.5 A at 125 VAC and 1.14 A at 250 VAC, providing reliable performance across standard AC voltage levels. The switch incorporates a black plastic actuator with a push-in (Pl) style, a solder lug terminal type, and a 0.172-inch mounting hole diameter, making it suitable for compact panel installations. With a bushing length of 0.175 inches and momentary off-to-on operation, this switch is commonly used in control panels, instrumentation, and consumer electronics where space is limited and dependable switching action is required.