The G81BB57 is a high-voltage, single-pole single-throw normally closed (SPST-NC) relay from the GIGAVAC G81 series. It is configured for panel mounting with stud terminals for high-voltage connections and operates on a nominal coil voltage of 26.5 Vdc. The relay is rated for a maximum operating voltage of 10 kV peak and can handle a continuous carry current of 10 amps. Featuring tungsten contacts for improved hot load switching and a mechanical life of 2 million cycles, this device ensures high reliability. Its ability to operate in a wide ambient temperature range from -55°C to +85°C makes it suitable for various demanding industrial and test equipment applications.