STH8N120K5-2AG

The STH8N120K5-2AG is a high-performance N-channel power MOSFET manufactured by STMicroelectronics, designed for efficient switching applications in power conversion and management systems. It features a maximum drain-source voltage (VDS) of 1200 V, enabling it to handle high-voltage environments commonly found in industrial and automotive electronics. The device offers a low on-resistance (RDS(on)) of typically 4.5 Ω at VGS = 10 V, which minimizes conduction losses and improves overall system efficiency. This MOSFET is optimized for fast switching speeds with a gate charge (Qg) of approximately 69 nC, allowing for reduced switching losses and improved thermal performance under high-frequency operation. Its robust construction includes a TO-247-3L package, providing excellent thermal dissipation and mechanical reliability in demanding conditions. The device also supports continuous drain current (ID) up to 8 A at 25°C junction temperature, making it suitable for medium-power applications requiring stable operation over extended periods. Key features include a built-in body diode with low forward voltage drop, enhancing its utility in freewheeling and synchronous rectification circuits. The STH8N120K5-2AG is characterized by a high avalanche energy rating, ensuring safe operation during transient overvoltage events such as inductive kickback or lightning surges. Additionally, it exhibits excellent gate threshold voltage stability across temperature variations, which contributes to consistent switching behavior in harsh environments. Common applications include motor drives, industrial power supplies, renewable energy inverters, and electric vehicle (EV) charging systems where reliable high-voltage switching is essential. Its design aligns with stringent safety standards such as IEC 60747-17 and UL 1577, making it appropriate for use in safety-critical systems. The device also meets RoHS compliance, supporting environmentally responsible manufacturing practices. Engineered for ease of integration, the STH8N120K5-2AG requires minimal external components for driver circuits due to its well-defined gate characteristics and low gate drive requirements. This simplifies PCB layout and reduces overall system cost while maintaining high performance. With its combination of high voltage capability, low conduction and switching losses, and ruggedized design, this MOSFET serves as an ideal solution for modern power electronics demanding efficiency, durability, and precision control.