IRF840AS IRF840AS is a 500V, 8A N-Channel power MOSFET from Vishay Dale in a D2PAK surface mount package. It features low gate charge and high switching speed.
Mfr Part #:

IRF840AS

Available from 1 distributors
Mfr Name: Vishay
Vishay
IRF840AS is a 500V, 8A N-Channel power MOSFET from Vishay Dale in a D2PAK surface mount package. It features low gate charge and high switching speed.
✓ Total Stock: 2 pcs
$ Price Range: $3.33

IRF840AS Available from 1 distributor

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✓ Non-Authorised
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2 pcs
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IRF840AS Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Drain to Source Voltage (Vdss)
Drive Voltage (Max Rds On, Min Rds On)
FET Type
Gate Charge (Qg) (Max) @ Vgs
Halogen Free
Input Capacitance (Ciss) (Max) @ Vds
Mounting Type
Operating Temperature
Power Dissipation (Max)
Rds On (Max) @ Id, Vgs
Storage Temperature
Supplier Device Package
Technology
Vgs (Max)
Vgs(th) (Max) @ Id

IRF840AS Description

Short technical summary and product information.

The IRF840AS is an N-Channel power MOSFET manufactured by Vishay Dale. It is designed for high voltage switching applications such as switch mode power supplies (SMPS) and uninterruptible power supplies (UPS). With a drain-source voltage rating of 500V and continuous drain current of 8A at 25°C, it can handle moderate power loads.

 

Key electrical characteristics include a maximum on-resistance of 0.85Ω at 10V gate drive and 4.8A drain current, gate threshold voltage of 4V maximum, and total gate charge of 38nC at 10V. Input capacitance is 1018pF at 25V drain-source voltage. The device is capable of dissipating up to 125W at case temperature 25°C.

 

The IRF840AS is offered in a surface mount D2PAK (TO-263) package, which is suitable for automated assembly. The operating junction temperature range is -55°C to 150°C, allowing use in harsh environments. The part is RoHS3 compliant (unverified) and has an MSL level of 1 (unlimited).

IRF840AS Quick Information

Product Type: Power MOSFET
Series: IRF840
Canonical Name: IRF840AS N-Channel Power MOSFET
Subcategory: N-Channel Power MOSFET

IRF840AS Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: No

IRF840AS Estimated Pricing

Qty Low High
1,000+ $3.33 $3.33

Estimated market price range - modelled values for guidance only, not live distributor offers.

IRF840AS Features

  • N-Channel MOSFET with 500V drain-source voltage.
  • Continuous drain current of 8A at 25°C.
  • Low on-resistance of 0.85Ω at 10V gate drive.
  • Surface mount D2PAK (TO-263) package.
  • Wide operating temperature range -55°C to 150°C.

IRF840AS Applications

  • Suitable for switch mode power supplies.
  • Used in uninterruptible power supplies.
  • Ideal for high speed power switching circuits.
  • Applicable in two transistor forward converters.

IRF840AS FAQs

7 frequently asked questions generated from this part’s specifications.
What is the drain-source voltage rating of IRF840AS?

The drain-source voltage (Vdss) is 500 V.

What package does IRF840AS come in?

It comes in a D2PAK (TO-263) surface mount package, also referred to as TO-263-3.

What is the operating temperature range for IRF840AS?

The operating junction temperature range is -55°C to 150°C.

Is IRF840AS RoHS compliant?

The part is listed as RoHS3 compliant, but this status is unverified and has low confidence.

What is the continuous drain current of IRF840AS?

The continuous drain current is 8 A at 25°C case temperature.

What is the on-resistance of IRF840AS?

The maximum on-resistance (Rds(on)) is 0.85 Ω at 4.8 A drain current and 10 V gate drive.

What is the gate threshold voltage of IRF840AS?

The maximum gate threshold voltage (Vgs(th)) is 4 V at 250 µA drain current.

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