Datasheet | Irlml6401trpbf

A detailed look at the graph in the datasheet reveals the boundaries of the device's reliability.

The IRLML6401TRPBF is arguably one of the most popular P-Channel MOSFETs in the history of hobbyist and low-voltage industrial electronics. While it is not a cutting-edge component in terms of absolute maximum performance, its legacy lies in its capability combined with the SOT-23 package . It effectively solved the problem of switching medium-power loads using low-voltage microcontrollers (like Arduino, ESP32, and STM32) without the need for intermediate driver circuitry. irlml6401trpbf datasheet

While the silicon can handle 4.3A, the package creates a thermal bottleneck. In practical applications, designers typically limit continuous current to 1.5A - 2A to prevent overheating without a heatsink. A detailed look at the graph in the