The 2SK1581-T1B-A is a N-Channel MOSFET (Metal Oxide Semiconductor Field-Effect Transistor) designed for various electronic applications. It falls under the category of discrete semiconductor products and specifically belongs to the FETs, MOSFETs - Single FETs, MOSFETs technology. The 2SK1581-T1B-A is a compact and versatile device with a drain-source voltage of 16 V and a continuous drain current of 200mA. It has a low on-resistance of 5 Ohms, making it suitable for efficient power management. With a surface mount mounting type and a package/case type of TO-236-3, SC-59, SOT-23-3, it can be easily integrated into circuit boards. Although the 2SK1581-T1B-A is an obsolete product, it has been widely used in various electronic applications that require efficient power management and switching capabilities.