FQP2N40

N-channel MOSFET transistors, 400V, 1.8A, TO-220 package

Manufacturer: ['fairchild', 'onsemi', 'iscsemi']

series introduction

# FQP2N40 Product Series Introduction

## 1. Overview
The FQP2N40 product series belongs to the family of N - channel MOSFETs (Metal - Oxide - Semiconductor Field - Effect Transistors). These MOSFETs are designed to offer high - performance switching and amplification capabilities in a wide range of electronic applications. With their advanced semiconductor technology, the FQP2N40 series provides reliable and efficient operation, making them a popular choice among engineers and designers.

## 2. Key Features

### Electrical Characteristics
- **High Voltage Rating**: The FQP2N40 series is rated for a maximum drain - source voltage (VDS) of 400V. This high voltage rating allows the MOSFETs to handle relatively high - power applications, such as in power supplies, motor control circuits, and high - voltage switching circuits.
- **Low On - Resistance (RDS(on))**: These MOSFETs have a low on - resistance value. A low RDS(on) means that when the MOSFET is in the on - state, there is less power dissipation across the device. This results in higher efficiency and less heat generation, which is crucial for applications where power efficiency is a priority. For example, in battery - powered devices, a low RDS(on) helps to extend the battery life.
- **Fast Switching Speed**: The FQP2N40 series offers fast switching times, including short turn - on and turn - off times. This fast switching capability enables the MOSFETs to be used in high - frequency applications, such as in switching power supplies and radio - frequency (RF) circuits. Fast switching reduces the time during which the device is in the transition state, minimizing power losses and improving overall system performance.

### Package and Thermal Characteristics
- **TO - 220 Package**: The FQP2N40 MOSFETs are typically available in the TO - 220 package. This package is a popular choice in the electronics industry due to its good thermal performance and ease of mounting. The TO - 220 package has a large surface area that allows for efficient heat dissipation, which is important for maintaining the reliability and performance of the MOSFET under high - power conditions.
- **Thermal Resistance**: The series has a relatively low thermal resistance, which means that heat can be transferred from the MOSFET to the surrounding environment more effectively. This helps to prevent the device from overheating, even when operating at high currents or in high - temperature environments.

## 3. Applications

### Power Supplies
- **Switch - Mode Power Supplies (SMPS)**: In SMPS, the FQP2N40 MOSFETs can be used as the main switching element. Their high voltage rating and fast switching speed make them suitable for converting high - voltage DC input to low - voltage DC output efficiently. The low on - resistance also helps to reduce power losses in the switching process, improving the overall efficiency of the power supply.
- **Uninterruptible Power Supplies (UPS)**: UPS systems require reliable and efficient power switching components. The FQP2N40 series can be used in the inverter section of a UPS to convert DC power from the battery to AC power for the connected load. Their high voltage handling capability and fast switching performance ensure stable and continuous power supply during power outages.

### Motor Control
- **DC Motor Drives**: The FQP2N40 MOSFETs can be used in DC motor drive circuits to control the speed and direction of the motor. By switching the power supply to the motor on and off at high frequencies, the MOSFETs can regulate the average voltage applied to the motor, thereby controlling its speed. Their fast switching speed allows for precise control of the motor, and the high voltage rating can handle the back - EMF (elect

Images for reference

TO-220-3, TO-220AB

TO-220-3, TO-220AB

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Datasheets

Partlist

FQP2N40
FQP2N40_F080