Mfr Part #:

IRF840

Mfr Name: Vishay

IRF840 is an N-Channel Power MOSFET from Vishay Dale with 500V drain-source voltage and 8A continuous drain current. It features a low on-resistance of 0.85Ω and is housed in a TO-220AB through-hole package.

✓ Total Stock: 13,950 pcs

IRF840 Available from 3 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Optech Co.,Limited ✓ Non-Authorised Inventory information	8,100 pcs On Request	8100 pcs	On Request	1	On Request	On Request	2014+	On Request	On Request
Components Technology Group, Inc. ✓ Non-Authorised Inventory information	5,750 pcs On Request	5750 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Chanetech ✓ Non-Authorised Inventory information	100 pcs On Request	100 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

IRF840 Description

Short technical summary and product information.

The IRF840 is an N-Channel Power MOSFET utilizing PowerMesh II technology from Vishay Dale. It is designed for high-voltage, high-speed switching applications. Key electrical specifications include a maximum drain-source voltage of 500V, continuous drain current of 8A at 25°C (5.1A at 100°C), and a maximum on-resistance of 0.85Ω at Vgs=10V. The device is avalanche rated with a single pulse energy capability of 520mJ and features a peak diode recovery dv/dt of 3.5 V/ns. Gate charge is 63nC maximum, enabling efficient switching. Typical input capacitance is 832pF. The MOSFET is housed in a TO-220-3 through-hole package (TO-220AB) with a maximum power dissipation of 125W at 25°C case temperature. Operating junction temperature range is -55°C to 150°C. Typical applications include switch mode power supplies (SMPS), DC-AC converters for welding equipment, uninterruptible power supplies, and motor drives.

IRF840 Quick Information

Product Type: MOSFET

Series: PowerMesh II

Canonical Name: IRF840 N-Channel MOSFET 500V 8A TO-220AB

Subcategory: N-Channel MOSFET

IRF840 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

IRF840 Features

N-Channel Power MOSFET with 500V drain-source voltage.
Continuous drain current rating of 8A at 25°C.
Low on-resistance of 0.85Ω maximum.
Avalanche rated with 520mJ single pulse energy.
TO-220AB through-hole package for easy mounting.

IRF840 Applications

High current, high speed switching circuits.
Switch mode power supplies (SMPS).
DC-AC converters for welding equipment.
Uninterruptible power supplies and motor drives.

IRF840 FAQs

6 frequently asked questions generated from this part’s specifications.

What is the drain-source voltage rating of the IRF840?

The maximum drain-source voltage is 500V.

What package does the IRF840 come in?

The IRF840 is available in a TO-220-3 through-hole package (TO-220AB).

What is the operating temperature range of the IRF840?

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

Is the IRF840 RoHS compliant?

The IRF840 is listed as RoHS3 Compliant, but this status is unverified.

What is the typical on-resistance of the IRF840?

Typical Rds(on) is 0.75Ω at Vgs=10V, Id=3.5A.

What is the gate charge of the IRF840?

Maximum gate charge is 63nC at Vgs=10V.

Category	Transistors - FETs, MOSFETs - Single
Manufacturer Name	Vishay
Current	8 A
Drain to Source Voltage (Vdss)	500 V
Drive Voltage (Max Rds On, Min Rds On)	10 V
FET Type	N-Channel
Gate Charge (Qg) (Max) @ Vgs	63 nC
Input Capacitance (Ciss) (Max) @ Vds	1300 pF @ 25 V
Lead Style	Surface Mount
Mounting Type	Through Hole
Operating Temperature	-55°C ~ 150°C (TJ)
Power Dissipation (Max)	125 W
Rds On (Max) @ Id, Vgs	850 mΩ
Storage Temperature	-55°C ~ 150°C
Supplier Device Package	TO-220AB
Technology	MOSFET (Metal Oxide)
Vgs (Max)	±20 V
Vgs(th) (Max) @ Id	4 V