The Cap-XX HS208F is a surface mount device (SMD) supercapacitor, with a capacitance of 900mF (millifarads), a rated voltage of 5.8 volts DC (direct current), an operating temperature of –40°C to +85°C, and a tolerance rating of ±20%. It measures 39 millimeters by 17 millimeters by 3.4 millimeters and is rated for a maximum 30 amps. This device is suitable for applications such as energy storage, power delivery, and transient voltage filtering.