Also known as a distribution board or breaker panel, it acts as the control hub, distributing power to different circuits and protecting them from overloads and faults. This is where the electrical distribution box steps in. What is a Distribution Board? A distribution board —also called a panelboard, breaker panel, or electrical. A distribution board (also known as panelboard, circuit breaker panel, breaker panel, circuit breaker, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit. In this guide, we'll break down the 12 main types of distribution boxes in a way that's easy to understand. We'll chat about what each one does, where it shines, and then dive into how to choose the perfect box for your needs.