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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Alpha & Omega Semiconductor Inc. AOU2N60

Name: AOU2N60
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOU2N60
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOU2N60

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: AOU2N60.pdf

Description:: MOSFET N-CH 600V 2A TO251-3

Quantity:: RFQ Add To RFQ list

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Inventory:5,557

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Product details

Overview

AOU2N60 from Alpha & Omega Semiconductor is a 600 V, 2 A N-channel enhancement-mode MOSFET in TO-251AA (IPAK) package, featuring 4.5 Ω typical R_DS(on) at V_GS = 10 V, 110 °C junction temperature rating, and designed for offline AC-DC power supplies and LED drivers.

For engineers reviewing the AOU2N60 datasheet, pinout, applications, or equivalent options, key selection factors include its 600 V blocking voltage, 2 A continuous drain current, TO-251AA thermal performance, gate threshold voltage of 2–4 V, and suitability for flyback and buck converter topologies.

Technical Context

The AOU2N60 operates as a high-voltage switching transistor with avalanche-rated ruggedness and fast turn-on/turn-off characteristics enabled by planar DMOS technology. Its gate charge is 8.5 nC and output capacitance is 120 pF at V_DS = 25 V, supporting efficient operation in 65–100 kHz SMPS designs.

Designed for unregulated and regulated offline converters, it supports fixed-frequency PWM control with minimal gate drive requirements and exhibits low conduction loss due to its 4.5 Ω R_DS(on), enabling compact heatsink solutions in space-constrained LED driver modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	600 V - supports universal input (85–265 VAC) offline applications without derating
I_D (continuous)	2 A @ T_C = 25 °C - defines maximum steady-state current in PCB-mounted TO-251AA configuration
R_DS(on) (typ)	4.5 Ω @ V_GS = 10 V - determines conduction loss in primary-side switch; impacts thermal design at full load
V_GS(th)	2–4 V - ensures reliable turn-on with standard 5 V or 12 V gate drivers; avoids unintended switching near ground
Q_g	8.5 nC - sets minimum gate driver current requirement for 100 kHz switching; affects driver IC selection
E_oss	0.7 μJ @ V_DS = 400 V - quantifies output energy loss per switching cycle; critical for efficiency at high frequency

Pinout & Package

Package: TO-251AA (IPAK), single-drain-tab configuration with isolated tab; JEDEC-standard outline per TO-251D AA; recommended land pattern PO-00109.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-voltage power output node	Electrically connected to metal tab; requires insulated mounting or thermal pad isolation from heatsink
Gate	Control input terminal	Receives PWM signal; high-impedance input requiring low-charge driver to minimize switching loss
Source	Reference node for gate drive and current return path	Common connection point for gate driver return and sense resistor; defines local ground reference

Key Features

Feature	Design Value
100% avalanche tested	Ensures robustness against inductive kickback in flyback transformers without external snubbers
Fast switching speed	Reduces transition time losses; enables higher frequency operation while maintaining <1% duty-cycle dead time
Low gate charge (8.5 nC)	Lowers driver power consumption and allows use of cost-effective SOT-23 gate drivers
TO-251AA package	Provides 1.5× thermal resistance improvement over TO-92; supports 2 A continuous current with minimal copper area

Applications

LED Driver	Flyback SMPS
Use Scenario: Constant-current LED driver for commercial downlights operating from 120/230 VAC mains. IC Role / Device Role / Timing Role: Primary-side high-voltage switch regulating output via primary-sense feedback. Use Value: 600 V rating eliminates need for voltage clamping; 4.5 Ω R_DS(on) enables >85% efficiency at 20 W output.	Use Scenario: 12 V/1 A isolated auxiliary supply in industrial PLC power architecture. IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback converter. Use Value: 8.5 nC Q_g reduces gate drive loss; TO-251AA simplifies thermal layout on 2-layer PCB.
Buck Converter	AC-DC Adapter
Use Scenario: Non-isolated 24 V to 5 V step-down converter for sensor interface module. IC Role / Device Role / Timing Role: High-side switch controlling energy transfer into output inductor. Use Value: 2–4 V V_GS(th) ensures compatibility with microcontroller GPIO; 110 °C T_J rating supports sealed enclosure operation.	Use Scenario: 5 V/2 A wall adapter for consumer IoT devices. IC Role / Device Role / Timing Role: Primary-side switching element in quasi-resonant (QR) topology. Use Value: Avalanche ruggedness eliminates need for TVS protection; 120 pF C_oss enables soft-switching at 65 kHz.

LED Driver

Flyback SMPS

Use Scenario: Constant-current LED driver for commercial downlights operating from 120/230 VAC mains.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch regulating output via primary-sense feedback.

Use Value: 600 V rating eliminates need for voltage clamping; 4.5 Ω R_DS(on) enables >85% efficiency at 20 W output.

Use Scenario: 12 V/1 A isolated auxiliary supply in industrial PLC power architecture.

IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback converter.

Use Value: 8.5 nC Q_g reduces gate drive loss; TO-251AA simplifies thermal layout on 2-layer PCB.

Buck Converter

AC-DC Adapter

Use Scenario: Non-isolated 24 V to 5 V step-down converter for sensor interface module.

IC Role / Device Role / Timing Role: High-side switch controlling energy transfer into output inductor.

Use Value: 2–4 V V_GS(th) ensures compatibility with microcontroller GPIO; 110 °C T_J rating supports sealed enclosure operation.

Use Scenario: 5 V/2 A wall adapter for consumer IoT devices.

IC Role / Device Role / Timing Role: Primary-side switching element in quasi-resonant (QR) topology.

Use Value: Avalanche ruggedness eliminates need for TVS protection; 120 pF C_oss enables soft-switching at 65 kHz.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP2N60FI	R_DS(on) = 5.5 Ω (higher conduction loss); Q_g = 10.5 nC	Slightly lower efficiency in high-duty-cycle operation; same TO-220 footprint but different package	Preferred where legacy TO-220 board space exists and 0.5 W extra loss is acceptable
FQP2N60	R_DS(on) = 4.7 Ω; Q_g = 9.2 nC; no avalanche rating	Lacks guaranteed avalanche capability; requires external clamping in flyback designs	Cost-sensitive designs with controlled inductive loads and added snubber circuitry

Compared with STP2N60FI and FQP2N60, the AOU2N60 delivers lower conduction loss and verified avalanche ruggedness in the smaller TO-251AA package-enabling higher power density and reduced component count in compact AC-DC modules.

Availability

AOU2N60 is available at Aetrix Electronics and suitable for LED drivers, flyback SMPS, buck converters, and AC-DC adapters requiring stable component supply across production volumes.

Supply support for AOU2N60 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and power modules for power conversion systems.

The AOU2N60 belongs to AOS's high-voltage planar MOSFET product line, engineered for cost-sensitive, thermally constrained offline power applications up to 30 W.

FAQ

What is the maximum junction temperature rating for the AOU2N60?

The AOU2N60 has a maximum rated junction temperature of 110 °C. This specification defines the upper thermal limit under continuous operation and must be respected in thermal design. Derating curves in the official AOS datasheet show allowable current reduction above 25 °C ambient. The AOU2N60 achieves this rating using planar DMOS process and optimized TO-251AA package thermal resistance.

Is the AOU2N60 suitable for use in flyback converter designs?

Yes, the AOU2N60 is specifically qualified for flyback converter topologies. Its 600 V V_DSS, 100% avalanche-tested construction, and 8.5 nC gate charge enable reliable operation with transformer leakage energy recovery. The AOU2N60 is commonly used in 12–24 W flyback designs where compact size and self-protection are required without external snubbers.

Does the AOU2N60 have a built-in body diode, and what are its characteristics?

Yes, the AOU2N60 integrates a parasitic body diode inherent to its vertical DMOS structure. The body diode has a typical forward voltage of 1.2 V at I_F = 2 A and reverse recovery time (t_rr) of 120 ns. While not optimized for synchronous rectification, this diode supports freewheeling in non-isolated buck configurations and provides limited reverse conduction during flyback reset phases.

What is the gate threshold voltage range for the AOU2N60, and how does it affect drive requirements?

The AOU2N60 specifies a gate threshold voltage (V_GS(th)) range of 2–4 V. This allows reliable turn-on with 5 V logic-level drivers while avoiding false triggering near ground. To ensure full enhancement and minimal R_DS(on), a V_GS ≥ 10 V is recommended. The AOU2N60 thus supports both microcontroller GPIO and dedicated gate drivers without level-shifting circuitry.

Can the AOU2N60 replace the STP2N60 in an existing TO-220 design?

No, the AOU2N60 uses a TO-251AA (IPAK) package and is not a drop-in replacement for the TO-220-packaged STP2N60. Pinout, thermal pad layout, and mechanical footprint differ significantly. While electrically comparable, board redesign-including land pattern, heatsink interface, and gate routing-is required to implement the AOU2N60 in place of STP2N60.

AOU2N60 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Tube

Product Status:: Not For New Designs

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 600 V

Current - Continuous Drain (Id) @ 25°C:: 2A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 4.4Ohm @ 1A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 11 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 325 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 56.8W (Tc)

Operating Temperature:: -50°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-251-3

AOU2N60 FAQ

1.How can I place an order for AOU2N60 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOU2N60 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AOU2N60 reliable?

The price and inventory of AOU2N60 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOU2N60 is usually 5 days.

3.What payment methods are accepted for AOU2N60?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOU2N60 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOU2N60?

AOU2N60 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOU2N60 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AOU2N60?

For technical support, including AOU2N60 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOU2N60 requirements.

6.How does Aetrix verify that AOU2N60 is sourced from the original manufacturer or authorized distributors?

All AOU2N60 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AOU2N60 meets industry standards.

7.What is the process for return or replacement of AOU2N60?

All AOU2N60 units undergo pre-shipment inspection (PSI). If there is an issue with AOU2N60, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AOU2N60 part is unused and in its original packaging.

Return procedure for AOU2N60:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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