High-Voltage/High-Current FET vs. Low-Power/Logic-Level FET: Selection Guide by Purpose

When designing electronic circuits, choosing the right FET (Field Effect Transistor) plays a crucial role in ensuring stability and efficiency. Among the most important categories to understand are high-voltage/high-current FETs and low-power/logic-level FETs . These two serve very different purposes and require specific considerations. This post compares both types from a practical design perspective.     1. Basic Criteria: Voltage, Current, Gate Drive High-voltage/high-current FETs: Used in industrial power supplies, motor drivers, and DC-DC converters, with drain-source voltage ratings from several hundred volts and current capacities exceeding tens of amps. Logic-level/low-power FETs: Suitable for microcontroller-level signals, Raspberry Pi, Arduino, and small load controls. These FETs turn on fully with just 2.5–5V on the gate. 2. Specification Comparison Table Parameter High-Voltage/High-Current FET Logic-Level FET ...