825A4620G is a 4-terminal, 200A current sensor manufactured by Tamura. It is a compact and rugged device designed for power supplies, inverters, and other power electronics applications. The device is made from two pieces of silicon, a high side and low side, that are insulated from each other with an epoxy resin. This allows it to sense both dc and ac currents over a wide voltage range. It also has a high accuracy and low temperature drift, making it suitable for a wide range of applications.