KW-5R5C334H-R is a coin cell supercapacitor utilizing electrochemical double layer capacitor (EDLC) construction for ultrahigh capacitance energy storage. It features a capacitance of 0.33 F with a working voltage of 5.5 V, surge voltage of 6.3 V, and a maximum initial DC ESR of 50 O measured at 1 kHz. The device has a short lead configuration with lead lengths of 3.3 mm (L- and L+), a typical mass of 3.7 g, and operates over a temperature range of -40 °C to +85 °C. This supercapacitor offers high specific capacitance, low leakage current, and long cycle life, making it ideal for applications such as electric utility meters, motor control units, solar inverters, Real-Time Clock (RTC) backup, and Programmable Logic Controllers (PLCs).