The KL-209/37,5/3/SW is a TO3-style electronic component manufactured by Seifert, featuring a black extruded heatsink. The overall dimensions of the KL-209/37,5/3/SW component are 37.5mm (length), 100mm (width) and 50mm (height). The KL-209/37,5/3/SW component has a TO3 (Transistor-Outline) package, used for manufacturing discrete semiconductor devices such as transistors, diodes and other electronic components. In addition, the KL-209/37,5/3/SW component is equipped with a black extruded heatsink, used as a sink for the dissipated heat, helping to ensure that the component does not become too hot in operation and reducing its operational temperature.