A039 is a series of test products that are manufactured by Test Products International (TPI). The series consists of a range of advanced testing systems, test adapters, test organizers and other products that are used to assess the performance and reliability of electronics and industrial components. The products in the A039 series are designed with robust features and high accuracy for superior performance. They also feature several different voltage and current ranges, as well as a variety of testing methods and high-resolution displays. The A039 series is designed to be user-friendly, cost-effective, and reliable for lab and industrial testing environments.