STGD20N40LZ

STGD20N40LZ is a high-performance N-channel power MOSFET manufactured by STMicroelectronics, designed for efficient switching applications in power management systems. It features a maximum drain-source voltage (VDS) of 400 V, enabling it to handle high-voltage circuits commonly found in industrial and consumer electronics. The device offers a low on-resistance of typically 1.3 Ω at VGS = 10 V, which minimizes conduction losses and improves overall system efficiency—particularly beneficial in energy-sensitive designs. This MOSFET is optimized for fast switching speeds due to its low gate charge (Qg = 65 nC typ.) and low output capacitance (Coss = 370 pF typ.), making it suitable for high-frequency switching applications such as switch-mode power supplies (SMPS), DC-DC converters, and motor drives. Its robust construction supports continuous drain current (ID) up to 20 A at 25°C junction temperature, ensuring reliable operation under demanding load conditions. The STGD20N40LZ incorporates a trench technology structure that enhances thermal performance and reduces switching losses compared to traditional planar designs. It also includes a built-in anti-parallel diode for protection against reverse current flow, simplifying circuit design in inductive load applications like relay drivers or buck converters. The device is housed in a TO-220 package, offering excellent thermal dissipation and mechanical stability for surface-mount or through-hole mounting configurations. Common applications include industrial power supplies, battery charging systems, LED lighting drivers, and automotive power modules where reliability, efficiency, and compact form factor are critical. Its wide operating temperature range—from -55°C to +150°C—makes it suitable for harsh environments, such as those encountered in automotive and outdoor industrial settings. The device complies with RoHS standards and is fully qualified for use in safety-critical systems due to its high avalanche ruggedness and reliable short-circuit protection capabilities. These characteristics make the STGD20N40LZ a versatile and durable solution for modern power electronics, balancing performance, efficiency, and ease of integration into diverse electronic platforms.