The Siemens BF120A is a 1 pole, 20 amp GFCI bolt-on circuit breaker designed for branch circuit applications and includes self test. It operates on AC current at a voltage range of 101-150 volts, providing thermal overload protection and a trip indicator for added safety. This breaker is from the renowned brand Siemens, ensuring quality and reliability in electrical equipment and supplies. It is suitable for various industrial and business applications where protection against overloads and short circuits is required.