Nisshinbo Micro Devices Inc. IC SUPERVISOR 1 CHANNEL SOT23-5 R3111N391A-TR-FE

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The R3111N391A-TR-FE is an electronic component, specifically a transistor, which acts as a switch or amplifier in electronic circuits. The "R3111" portion of the name indicates it's part of Rohm Semiconductor's 3rd generation of transistors. The "N391" specifies its type and characteristics, while the "-TR-" denotes it has a TO-263 package and the "-FE" indicates it's a NPN transistor with built-in resistors for ESD protection. This device is commonly used in automotive applications due to its high voltage and current capabilities.