Part Number: FDN335N

Manufacturer: Onsemi

Description: MOSFET N-CH 20V 1.7A SUPERSOT3

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of FDN335N

Datasheet  FDN335N datasheet
Category Discrete Semiconductor Products
Family Transistors – FETs, MOSFETs – Single
Manufacturer Fairchild Semiconductor
Series PowerTrench?
Packaging Tape & Reel (TR)
FET Type MOSFET N-Channel, Metal Oxide
FET Feature Logic Level Gate, 2.5V Drive
Drain to Source Voltage (Vdss) 20V
Current – Continuous Drain (Id) @ 25°C 1.7A (Ta)
Rds On (Max) @ Id, Vgs 70 mOhm @ 1.7A, 4.5V
Vgs(th) (Max) @ Id 1.5V @ 250μA
Gate Charge (Qg) @ Vgs 5nC @ 4.5V
Input Capacitance (Ciss) @ Vds 310pF @ 10V
Power – Max 460mW
Operating Temperature -55°C ~ 150°C (TJ)
Mounting Type Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3
Supplier Device Package SuperSOT-3

FDN335N Introduction

The FDN335N was made to work with other parts. It comes in a small package called SUPERSOT3, which is a good mix between size and thermal properties. In this detailed guide, we’ll learn all about the FDN335N MOSFET, including its most important features, how it works electrically, and how to use it in real life.

Find out how to use the FDN335N to its fullest ability and make the most of its features in your designs. Get ready for voltage switching and power control applications to work better than ever.

FDN335N Electrical Characteristics

● Maximum Drain-Source Voltage (VDS)

The maximum drain-source voltage tells how much voltage can be put between the drain and source wires before the MOSFET breaks down or is damaged. If this voltage is exceeded, the gadget may stop working or be less reliable. It is important to make sure that the VDS stays within the limits set so that it works well and no damage is done.

● Continuous Drain Current (ID)

The continuous drain current is the maximum amount of current that the MOSFET can handle continuously without going over the temperature limits it was designed for. It tells how much power the device can handle and is a key parameter for apps that require high power switching or current carrying. Operating the MOSFET within the stated ID range makes sure it works right and keeps it from getting too hot or breaking down.

● Gate Threshold Voltage (VGS (th))

The gate threshold voltage is the amount of voltage needed to turn on the MOSFET and make a way for current to flow between the drain and source terminals. It decides how the MOSFET is controlled and affects how it switches on and off. If designers understand the VGS (th), they can properly drive the MOSFET’s gate terminal and control how it works in different situations.

● Operating Conditions

For safe and reliable operation, the highest voltage and current ratings of the FDN335N need to be taken into account. The transistor’s highest voltage rating is 20 V, which means that the voltage applied across the transistor shouldn’t be higher than this. If the transistor is used with more voltage than its highest rating, the voltage can break down, which could damage the device.

In the same way, the FDN335N can handle up to 1.7 A (Ta) of current. It is very important to make sure the current going through the transistor doesn’t go over this limit. When the transistor is used with currents that are higher than its highest rating, it can make too much heat, lose more power, and even break.

The FDN335N transistor will last longer and work more reliably if you stay within these working limits. If you go over the highest voltage or current ratings, it can cause thermal stress, device degradation, and even permanent damage. It’s a good idea to think carefully about the voltage and current needs of the application and choose the right safety measures, like current-limiting resistors or voltage regulators, to make sure the transistor is working well within its limits. By following the suggested operating conditions, the FDN335N can give you the best performance, be more efficient, and have a more reliable system as a whole.

FDN335N Applications

The FDN335N is used in many electronic systems where switching and amplifying power need to be done efficiently. It is often used in switching circuits, where it can control the flow of electricity and act as a solid-state switch. The FDN335N’s ability to handle moderate current loads makes it good for voltage regulation and power distribution jobs. Signal amplification circuits use the transistor’s ability to boost weak signals, which makes sure that signals are sent cleanly and reliably. The FDN335N can also be used to control the speed and direction of motors in control circuits for motors.

Thermal Considerations

The FDN335N can handle up to 500 mW (Ta) of power. This number shows how much power the transistor can waste as heat without going over its thermal limits. To keep things from getting too hot, it’s important to think about how power is lost and use the right thermal management methods. This can be done by making sure there is enough movement, using a heat sink, or putting thermal pads on the transistor to move heat away from it. The speed, dependability, and longevity of a transistor can be maintained with good thermal management, which prevents thermal stress and possible damage.

Electrical Characteristics

The FDN335N’s electrical properties affect its performance at different settings. The threshold voltage determines the transistor’s input voltage. RDS (on) is the drain-to-source resistance when the transistor is fully conducting. Lower on-resistance reduces power dissipation and improves efficiency. Input and output capacitances affect transistor switching speed and performance. Higher capacitances slow switching and increase power losses. Understanding these electrical characteristics helps choose optimal working conditions and create FDN335N-optimised circuits.

Safe Handling and Design Considerations

To avoid electrostatic discharge damage, handle the FDN335N carefully. ESD protection devices, correct grounding, and ESD-safe handling of the transistor are required. Design issues include voltage and current compatibility with the transistor’s specifications, switching speed, and drive circuits. Designing durable and dependable electronic systems requires considering transistor properties and circuit needs, including load and signal integrity.

Frequently Asked Questions (FAQs) About the FDN335N N-Channel MOSFET Transistor

● How many volts can the FDN335N handle?

The FDN335N has a voltage rating of 20 V, which means it can be used in situations that need a moderate amount of voltage.

● What is the rate of the FDN335N right now?

The FDN335N can handle up to 1.7 A of current, which is enough power for many electronic systems.

● What kind of package does the FDN335N come in?

The FDN335N comes in a small surface-mount SOT-23-3 package, which makes it easy to put on circuit boards.

● What are some popular ways that the FDN335N is used?

The FDN335N can be used for a wide range of electrical tasks, such as switching circuits, power management, signal amplification, and motor control.

● How should I take care of the FDN335N’s heating needs?

The FDN335N can use up to 500 milliwatts of power. To keep things from getting too hot, it’s important to use good thermal management methods, like enough cooling and heat sinking.

● What are some of the FDN335N’s most important electrical features?

The FDN335N’s threshold voltage, on-resistance, and capacitance are some of its most important electrical properties. These properties affect how the transistor works in different operating situations and should be taken into account when designing a circuit.

● How do I safely handle and put together the FDN335N?

Electrostatic discharge (ESD) steps need to be taken when handling the FDN335N so that the device doesn’t get broken. Also, make sure the voltage and current requirements are compatible, think about the switching speed, and design the circuits to meet the needs of the particular application.

● How do I get the FDN335N and other computer parts?

Contact ICRFQ, China’s top seller of electronic components, to get the FDN335N and a wide range of other high-quality parts for your projects. Because of their large selection and dependable service, they are a trusted supplier in their field.


The FDN335N N-channel MOSFET transistor is a flexible part that can handle voltages up to 20 V and currents up to 1.7 A. It can be used for many electronic tasks because its SOT-23-3 package is small. For safe and effective integration into circuits, you need to know their specs and rules. Contact ICRFQ, China’s top seller of electronic parts, to get the FDN335N and other high-quality parts for your projects. Check out what we have to offer and make your electronic ideas come to life today.

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