The ISR3SAD300 is a single-pole single-throw (SPST) momentary threaded bushing sealed Pushbutton Switch with solder lug terminal, green round curved polyamide 6/6 actuator, black bezel and NO function. The IB series switch has gold plated silver contact, polyamide 6/6 bushing/bezel and epoxy terminal seal. A sealing boot is available to protect the switches against frost and sand.