FQP19N20 vs CSD18503KCS

Part Number	FQP19N20	CSD18503KCS
Category	Transistors - FETs, MOSFETs - Single	Transistors - FETs, MOSFETs - Single
Manufacturer	ON Semiconductor	National Semiconductor
Description	MOSFET N-CH 200V 19.4A TO220-3	CSD18503KCS 40V, N CHANNEL NEXFE
Package	Tube	-Reel®
Series	QFET®	-
Operating Temperature	-55°C ~ 150°C (TJ)	-
Mounting Type	Through Hole	-
Package / Case	TO-220-3	-
Supplier Device Package	TO-220-3	-
Technology	MOSFET (Metal Oxide)	-
Power Dissipation (Max)	140W (Tc)	-
FET Type	N-Channel	-
FET Feature	-	-
Drain to Source Voltage (Vdss)	200 V	-
Current - Continuous Drain (Id) @ 25°C	19.4A (Tc)	-
Rds On (Max) @ Id, Vgs	150mOhm @ 9.7A, 10V	-
Vgs(th) (Max) @ Id	5V @ 250µA	-
Gate Charge (Qg) (Max) @ Vgs	40 nC @ 10 V	-
Input Capacitance (Ciss) (Max) @ Vds	1600 pF @ 25 V	-
Vgs (Max)	±30V	-
Drive Voltage (Max Rds On, Min Rds On)	10V	-

1. What is the difference between a MOSFET and a transistor?

Transistors are usually bipolar (BJT) and rely on current control, while MOSFETs are voltage controlled.
BJTs have a higher input impedance, but MOSFETs usually have a higher input impedance.
MOSFETs are better suited for high-frequency operation because they switch faster.
2. How to connect a MOSFET?

The source is usually connected to a lower potential (such as ground).
The drain is connected to the load or power supply.
The gate is connected to the control signal through an appropriate drive circuit.
Sometimes a small resistor is added between the gate and the source to prevent oscillation.
3. Why use MOSFETs instead of transistors?

MOSFETs are superior to traditional BJT transistors in many applications due to their high input impedance, low power consumption, high speed, and easy integration.
4. What are the advantages of MOSFETs?

High input impedance.
Low noise.
Low power consumption.
Fast switching characteristics.
Easy to integrate.
High reliability and durability.