The BFC233845104 from Vishay is a safety capacitor with a 1uF (1 microfarad) capacitance, +/- 10% tolerance, and rated for 305 volts. It's designed to help block voltage transients, filter out high frequency noise, and provide decoupling in applications like LED and lighting drivers, power supplies, and motor control systems. The capacitor is constructed with an aluminum electrolytic core and embedded with a thermal fuse for protection against overvoltage. The capacitor also features a Class X2 dielectric, which ensures a higher level of safety in critical applications. The device is packaged in a slender, plastic case and features a protection cap for safe handling.