The G401020B STYLE B part is a switch from Gainta, a leading manufacturer of switches and other electrical components. It is a type of toggle switch with a single pole, double throw (SPDT) configuration. The switch has a maximum current rating of 10A and a voltage rating of 250VAC. It is designed with an off-momentary-on switch mechanism, meaning that the switch can be actuated between the OFF, MOMENTARY, and ON positions. The G401020B STYLE B switch features two momentary contacts, one normally open contact, and one normally closed contact, making it a great choice for use in applications where a manual or momentary button or lever needs to be actuated. The switch body is constructed of a durable, heat-resistant plastic and a zinc die-cast base, allowing for increased reliability and longevity.