Transistors - FETs, MOSFETs

Transistors - FETs, MOSFETs - Single

Image	Part Number	Description / PDF	Quantity	Rfq
	RM2A8N60S4 Rectron USA	MOSFET N-CH 60V 2.8A SOT223-3	0
	RM138 Rectron USA	MOSFET N-CHANNEL 50V 220MA SOT23	0
	RM20P30D3 Rectron USA	MOSFET P-CHANNEL 30V 20A 8DFN	0
	2N7002KA Rectron USA	MOSFET N-CHANNEL 60V 115MA SOT23	0
	RM5N800T2 Rectron USA	MOSFET N-CHANNEL 800V 5A TO220-3	0
	RM100N65DF Rectron USA	MOSFET N-CHANNEL 65V 100A 8DFN	0
	RM5N800HD Rectron USA	MOSFET N-CHANNEL 800V 5A TO263-2	0
	RM40N100LD Rectron USA	MOSFET N-CH 100V 40A TO252-2	0
	RM1505S Rectron USA	MOSFET N-CHANNEL 150V 5.1A 8SOP	0
	RM21N650T2 Rectron USA	MOSFET N-CH 650V 21A TO220-3	0
	RMA7P20ED1 Rectron USA	MOSFET P-CH 20V 700MA DFN1006-3	0
	RM150N100ADF Rectron USA	MOSFET N-CHANNEL 100V 128A 8DFN	0
	RMP3N90LD Rectron USA	MOSFET N-CHANNEL 900V 3A TO252-2	0
	RM40P40LD Rectron USA	MOSFET P-CHANNEL 40V 40A TO252-2	0
	RM4N700IP Rectron USA	MOSFET N-CHANNEL 700V 4A TO251	0
	RMD1N25ES9 Rectron USA	MOSFET N-CHANNEL 25V 1.1A SOT363	0
	RM6N800T2 Rectron USA	MOSFET N-CHANNEL 800V 6A TO220-3	0
	RM2305B Rectron USA	MOSFET P-CH 20V 3A/4.1A SOT23	0
	RM25N30DN Rectron USA	MOSFET N-CHANNEL 30V 25A 8DFN	0
	RM6N800TI Rectron USA	MOSFET N-CHANNEL 800V 6A TO220F	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