The 1.5SMC200A-E3/57T is a 1500 Watt (W), 200 Volt (V) unidirectional transient voltage suppressor (TVS) manufactured by Vishay. This diode has a breakdown voltage of 227V and a maximum clamping voltage of 307V. This component is made with metal-oxide-semiconductor field-effect transistor (MOSFET) technology, which is ideal for clamping sudden, high-voltage surges. The diode is ideal for protecting against electrical spikes and surges, such as those from power outages or electrical storms. It is commonly used in automotive applications, such as airbags, and is also suited for industrial and consumer protection.