DescriptionThe 2N7002 is arguably one of the most widely used N-Channel MOSFETs in the world of discrete electronics. Designed specifically for low-voltage, low-current switching, it allows you to effortlessly bridge the gap between delicate logic controllers and higher-voltage peripherals without continuously draining your microcontroller’s power.Efficient Logic-Level SwitchingStandard BJT transistors require continuous base current to stay turned “on.” The 2N7002, however, is a voltage-controlled device. Thanks to its low gate threshold voltage (typically between 1V and 2.5V), it can be easily driven by the 3.3V or 5V logic pins of an ESP32, Raspberry Pi, or Arduino. Because the gate acts effectively like a capacitor, it draws virtually zero continuous current once triggered, making it incredibly highly efficient for battery-powered IoT devices.Compact SOT-23 FootprintDesigned for modern, space-constrained PCBs, the SOT-23 surface-mount package provides a tiny footprint without compromising switching speed or reliability. Featuring the highly recognizable top mark 7002, its universally adopted footprint integrates easily into manual prototyping, inventory sorting, or automated pick-and-place assembly processes.Circuit Best PracticesWhile the gate draws no continuous current, the internal gate capacitance does require a brief surge of current when rapidly switching states. It is always good practice to include a low-value series gate resistor to protect your logic pin from this transient spike. Additionally, placing a pull-down resistor (e.g., 10kΩ) between the gate and ground ensures the MOSFET firmly turns off when the logic signal is floating or removed.Key FeaturesVoltage-Controlled Operation: Draws almost zero continuous control current, protecting delicate logic pins.Logic-Level Compatible: Easily triggered by standard 3.3V and 5V microcontrollers.Miniature Footprint: The SOT-23 SMD package optimizes valuable PCB real estate while maintaining excellent thermal stability.Technical SpecificationsTransistor Polarity: N-ChannelDrain-Source Voltage (VDS): 60V MaximumContinuous Drain Current (ID): 115mA MaximumPulsed Drain Current (IDM): 800mA MaximumGate-Source Voltage (VGS): ±20VGate Threshold Voltage (VGS(th)): 1.0V (Min) to 2.5V (Max)Power Dissipation (PD): 200mWPackage Type: SOT-23 (Surface Mount)Top Marking Code: 7002Ideal ApplicationsLogic Level Shifting: Building bi-directional 3.3V to 5V logic-level converters for I2C and SPI buses.Low-Side Load Switching: Turning ground connections on and off for LEDs, small relays, and logic-level modules.Signal Routing: Multiplexing and routing low-current digital signals in custom hardware.Electronics Repair: Replacing faulty 7002-marked logic-level MOSFETs in consumer electronics and commercial logic boards.