Transistors - FETs, MOSFETs

Transistors - FETs, MOSFETs - Single

Part Number	Description / PDF	Quantity
PMPB12UNEX Nexperia	MOSFET N-CH 20V 11.4A 6DFN	3
PSMN2R5-60PLQ Nexperia	MOSFET N-CH 60V 150A TO220AB	5085
BUK7M15-60EX Nexperia	MOSFET N-CH 60V 42.9A LFPAK33	217
BUK9907-40ATC,127 Nexperia	MOSFET N-CH 40V 75A TO220-5	1968
BUK98150-55/CUF Nexperia	MOSFET N-CH 55V 5.5A SOT223	15000
PSMN4R3-80PS,127 Nexperia	MOSFET N-CH 80V 120A TO220AB	1
BUK7Y13-40B,115 Nexperia	MOSFET N-CH 40V 58A LFPAK56	1545
PMPB100ENEA115 Nexperia	SMALL SIGNAL N-CHANNEL MOSFET	30000
PSMNR58-30YLHX Nexperia	MOSFET N-CH 30V 300A LFPAK56	0
PMZB320UPE,315 Nexperia	NOW NEXPERIA PMZB320UPE - SMALL	30000
BUK7M67-60EX Nexperia	MOSFET N-CH 60V 14A LFPAK33	0
PSMN2R2-25YLC,115 Nexperia	MOSFET N-CH 25V 100A LFPAK56	2366
BUK9637-100E,118 Nexperia	MOSFET N-CH 100V 31A D2PAK	0
PSMN7R5-60YLX Nexperia	MOSFET N-CH 60V 86A LFPAK56	0
PMPB85ENEAX Nexperia	MOSFET N-CH 60V 3A DFN2020MD-6	1906
PHP18NQ10T,127 Nexperia	MOSFET N-CH 100V 18A TO220AB	1874
PSMN012-60MSX Nexperia	MOSFET N-CH 60V 53A LFPAK33	0
BUK9Y12-40E,115 Nexperia	MOSFET N-CH 40V 52A LFPAK56	3018
PSMN3R3-80BS,118 Nexperia	MOSFET N-CH 80V 120A D2PAK	147
NX3008PBKW,115 Nexperia	MOSFET P-CH 30V 200MA SOT323	143

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