These 4-pin SPST (Single Pole, Single-throw) switches are great for small circuits, and we use them as reset line signalers. These are momentary switches (only making contact while applying pressure). Keep in mind that 2 pins on one side of the switch and 2 pins on the other are connected together internally, so essentially you only need to make 2 connections to this switch.

These are high quality mini SPST momentary on switches. These switches have a long button (6.2mm) perfect for use as a switch behind an enclosure and also on boards with lot of components around the switch, which make pressing switches with a short button difficult.

• 9.5mm Total Height
• Plunger height is 6.2mm above mounting surface
• 6.2mm square body