The Schneider ZB4BL7340 is a 40mm mushroom head momentary push button switch. It has an illuminated ring light on the center of its head, is made from durable polycarbonate material, and is ideal for applications like controlling or indicating start/stop, forward/reverse, and similar operations. Its contacts are SPDT, with an electrical rating of 6(4)A at 125/250VAC and 3(2)A at 30VDC.