Transistors - FETs, MOSFETs

Transistors - FETs, MOSFETs - Single

Image	Part Number	Description / PDF	Quantity	Rfq
	AON6520 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 11A/50A 8DFN	0
	AON7700 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 16A/40A 8DFN	0
	AON7410L Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 8A/20A 8DFN	0
	AO6424A Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 6.5A 6TSOP	0
	AOD210_001 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 23A/70A TO252	0
	AON6410 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 10A/24A 8DFN	0
	AON6406 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 25A/170A 8DFN	0
	AOB2608L Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 60V 11A/72A TO263	0
	AOTF8T50PL Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 500V 8A TO220F	0
	AON2400 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 8V 8A 6DFN	0
	AON2401 Alpha and Omega Semiconductor, Inc.	MOSFET P-CH 8V 8A 6DFN	0
	AON6418 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 14A/36A 8DFN	0
	AON7784 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 31A/50A 8DFN	0
	AOD504 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 25V 18A/46A TO252	0
	AO4405 Alpha and Omega Semiconductor, Inc.	MOSFET P-CH 30V 6A 8SO	0
	AOT424 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 110A TO220	0
	AOL1424 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 30V 15A/70A ULTRASO8	0
	AOT474_002 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 75V 9A/127A TO220-3	0
	AOD474 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 75V 2.5A/10A TO252	0
	AOD4128 Alpha and Omega Semiconductor, Inc.	MOSFET N-CH 25V 60A TO252	0

Transistors - FETs, MOSFETs - Single

1. Overview

Field-Effect Transistors (FETs) and Metal-Oxide-Semiconductor FETs (MOSFETs) are voltage-controlled semiconductor devices that regulate current flow through an electric field. As fundamental components in modern electronics, they offer advantages such as high input impedance, low power consumption, and fast switching capabilities. Single discrete FETs/MOSFETs are widely used in power management, signal amplification, and switching applications across industries.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Junction FET (JFET)	Voltage-controlled depletion mode operation, low noise	Low-noise amplifiers, analog switches
Enhancement Mode MOSFET	Normally-off device, requires positive V_GS to conduct	Power supplies, motor drives
Depletion Mode MOSFET	Normally-on device, requires negative V_GS to block	Radio frequency amplifiers, load switches
Insulated Gate Bipolar Transistor (IGBT)	Combines MOSFET input with bipolar output, high current capacity	High-power industrial equipment, electric vehicles

3. Structure and Composition

A typical MOSFET structure includes three terminals: Source, Gate, and Drain. The gate is insulated by a thin layer of silicon dioxide (SiO₂), forming a capacitive control interface. The channel between source and drain is formed in a silicon substrate. Advanced devices use materials like silicon carbide (SiC) or gallium nitride (GaN) for higher performance. Packaging options include TO-220, DPAK, and SOT-23 for different thermal and space requirements.

4. Key Technical Specifications

Parameter	Description and Importance
V_DS (Drain-Source Voltage)	Maximum voltage rating between drain and source; determines breakdown tolerance
I_D (Drain Current)	Maximum continuous current capacity; critical for power handling
R_DS(on)	On-state resistance; impacts conduction losses and efficiency
V_GS(th) (Threshold Voltage)	Voltage required to form channel; determines control signal compatibility
Q_G (Gate Charge)	Charge required for switching; affects switching speed and driver requirements
P_D (Power Dissipation)	Maximum power handling capability; dictates thermal management needs

5. Application Fields

Consumer Electronics: Mobile phone chargers, notebook power adapters
Industrial: Motor drives, uninterruptible power supplies (UPS)
Automotive: Electric vehicle (EV) battery management systems, HEV inverters
Telecommunications: Base station power amplifiers, optical network transceivers
Renewable Energy: Solar micro-inverters, wind turbine converters

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Texas Instruments	CSD18534Q5A	60V, 4.2m R_DS(on), automotive-grade
STMicroelectronics	STP55NF06	55A, 60V, high-speed switching
Infineon Technologies	IPB041N06N3	0.41 , 600V, TO-220 package
ON Semiconductor	NDS355AN	Depletion mode, 300mA, RF applications

7. Selection Guidelines

Key considerations include:

Voltage and current requirements under operating conditions
Thermal performance (R_DS(on), package thermal resistance)
Switching speed vs. conduction loss trade-off
Gate drive compatibility with control circuitry
Environmental factors (temperature, vibration, humidity)
Cost-performance balance for volume production

8. Industry Trends

Current trends include:

Adoption of wide bandgap materials (SiC, GaN) for higher efficiency
Advanced packaging technologies (double-sided cooling, copper clip)
Integration with gate drivers and protection circuits
Miniaturization through trench and shielded gate structures
Development of automotive-qualified devices for EVs and ADAS