The GPB510A05BB is a momentary push button switch featuring a single-pole, single-throw (SPST) OFF-(ON) circuit. It is rated for 3A at 125V AC and 1.5A at 250V AC, with a maximum contact resistance of 50mΩ. Key electrical characteristics include a minimum insulation resistance of 100MΩ at 500V DC and a dielectric strength of 1000V AC for one minute. Designed for panel mounting, this RoHS compliant switch requires a 12.7mm cutout and is suitable for panels up to 3mm thick, making it ideal for various control applications.