Understanding Enhancement vs. Depletion Mode FETs for Advanced Circuit Design

Enhancement Mode FETs

• Operation: Require a gate-source voltage (VGS) to create a conductive channel. In their default state (VGS = 0), they remain non-conductive (normally off).

• Applications: Ideal for digital logic, power switches, and amplifiers. For example, our YFW150P04AS P-channel MOSFET (150A, 40V) excels in automotive power management systems, ensuring efficient energy conversion with low RDS(ON) (5.4mΩ) .

• Advantages: High switching speed, low power consumption, and compatibility with modern integrated circuits.

Depletion Mode FETs

• Operation: Feature a pre-formed channel at VGS = 0, allowing current flow (normally on). A negative VGS is needed to deplete the channel and turn them off.

• Applications: Commonly used in voltage regulators and analog circuits. For instance, in medical devices, our depletion-mode MOSFETs enable stable signal amplification while maintaining low noise levels .

• Advantages: Simplified circuit design and fail-safe operation in critical systems

Key Differences

Feature	Enhancement Mode	Depletion Mode
Default State	Off (VGS = 0)	On (VGS = 0)
Threshold Voltage	Positive (VGS(th) > 0)	Negative (VGS(th) < 0)
Typical Use Cases	Digital logic, power switching	Voltage regulation, analog amplifiers

YFW’s Expertise

YFW Diode’s FETs combine cutting-edge technology with rigorous quality testing to ensure optimal performance in automotive, industrial, and consumer electronics. Our YFW65R280AD (75A, 60V) MOSFET, designed for agricultural automation, demonstrates robust current handling and temperature stability in harsh environments .

Choose YFW for reliable FET solutions that drive innovation across industries. Visit www.yfwdiode.com to explore our full range of semiconductor products