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

Alpha & Omega Semiconductor Inc. AOU3N60

Name: AOU3N60
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOU3N60
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOU3N60

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

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

Datasheet:: AOU3N60.pdf

Description:: MOSFET N-CH 600V 2.5A TO251-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOU3N60 from Alpha & Omega Semiconductor is a 600 V, 3 A N-channel enhancement-mode MOSFET in TO-251AA (IPAK) package, featuring 2.4 Ω typical R_DS(on) at V_GS = 10 V, 100% avalanche-rated operation, and 150 °C maximum junction temperature - used in offline AC-DC auxiliary power supplies and LED driver high-side switches.

For engineers reviewing the AOU3N60 datasheet, pinout, applications, or equivalent options, key selection criteria include its 600 V blocking voltage, 3 A continuous drain current rating, TO-251AA thermal performance, and avalanche ruggedness for unclamped inductive switching in low-power SMPS designs.

Technical Context

The AOU3N60 employs a planar vertical DMOS structure optimized for high-voltage switching with low gate charge (Q_g = 12 nC typ.) and fast turn-on/turn-off times (t_on = 25 ns, t_off = 85 ns). Its body diode exhibits 45 ns reverse recovery time (t_rr) and 1.8 V forward voltage (V_SD) at I_S = 3 A.

Designed for hard-switched flyback and buck converters, the device supports gate drive voltages from 10 V to 20 V, with ±20 V maximum V_GS, and integrates a built-in ESD protection diode rated per HBM Class 1C (1 kV).

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	600 V - supports universal input (85–265 VAC) offline SMPS without derating
I_D (continuous)	3 A @ T_C = 25 °C - enables compact heatsink-free design in <5 W auxiliary rails
R_DS(on) max	3.0 Ω @ V_GS = 10 V - limits conduction loss to <27 mW at 3 A DC
Q_g	12 nC typ. - reduces gate drive power and enables >100 kHz operation with low-cost controllers
E_AS	125 mJ @ T_J = 25 °C - sustains repeated unclamped inductive switching in flyback snubberless designs
t_rr	45 ns - minimizes body-diode commutation loss during ZVS transitions

Pinout & Package

TO-251AA (IPAK) package: 3-pin single-ended leaded outline with drain-connected tab; body dimensions 6.5 mm × 5.55 mm × 7.7 mm (L×D×L1), JEDEC-compliant land pattern PO-00109.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-voltage power output terminal	Electrically connected to metal tab - requires insulated mounting or grounded heatsink
Gate	Control input	Receives 10–20 V logic-level signal; 12 nC total gate charge determines driver sizing
Source	Reference node / return path	Common connection point for gate drive return and current sensing; ties to primary ground

Key Features

Feature	Design Value
100% UIS tested	Guarantees robustness against transient overvoltage events in flyback transformer leakage spikes
Low Q_g/R_DS(on) ratio	4.0 nC/Ω - improves figure-of-merit for high-frequency, low-loss switching
Fast body diode	t_rr = 45 ns, Q_rr = 25 nC - reduces cross-conduction loss in quasi-resonant topologies
JEDEC TO-251AA compliant	Enables drop-in replacement of legacy IPAK MOSFETs without PCB redesign

Applications

AC-DC Auxiliary Power Supply	LED Driver High-Side Switch
Use Scenario: 5 W standby supply in TV or set-top box, powered from main bulk capacitor. IC Role / Device Role / Timing Role: High-side switch in discontinuous conduction mode (DCM) flyback converter. Use Value: 600 V rating eliminates need for voltage clamping; 3.0 Ω R_DS(on) keeps losses under 27 mW at full load.	Use Scenario: Constant-current LED string driver in smart lighting fixture with isolated control interface. IC Role / Device Role / Timing Role: Primary-side switching element controlling LED current via primary-sense feedback. Use Value: Avalanche rating ensures reliability during LED open-circuit transients; TO-251AA simplifies thermal management on small PCBs.
Industrial Sensor Power Module	White Goods Motor Control Stage
Use Scenario: Isolated 12 V rail for pressure/temperature sensors in HVAC control boards. IC Role / Device Role / Timing Role: Low-duty-cycle switch in self-oscillating flyback topology. Use Value: 150 °C T_J(max) supports operation in enclosed enclosures; 12 nC Q_g allows use with low-power PWM ICs.	Use Scenario: Fan motor pre-driver stage in refrigerator compressor control board. IC Role / Device Role / Timing Role: High-voltage level shifter enabling gate drive for downstream half-bridge MOSFETs. Use Value: Fast t_rr (45 ns) prevents shoot-through during level-shift transitions; TO-251AA footprint fits tight layout constraints.

AC-DC Auxiliary Power Supply

LED Driver High-Side Switch

Use Scenario: 5 W standby supply in TV or set-top box, powered from main bulk capacitor.

IC Role / Device Role / Timing Role: High-side switch in discontinuous conduction mode (DCM) flyback converter.

Use Value: 600 V rating eliminates need for voltage clamping; 3.0 Ω R_DS(on) keeps losses under 27 mW at full load.

Use Scenario: Constant-current LED string driver in smart lighting fixture with isolated control interface.

IC Role / Device Role / Timing Role: Primary-side switching element controlling LED current via primary-sense feedback.

Use Value: Avalanche rating ensures reliability during LED open-circuit transients; TO-251AA simplifies thermal management on small PCBs.

Industrial Sensor Power Module

White Goods Motor Control Stage

Use Scenario: Isolated 12 V rail for pressure/temperature sensors in HVAC control boards.

IC Role / Device Role / Timing Role: Low-duty-cycle switch in self-oscillating flyback topology.

Use Value: 150 °C T_J(max) supports operation in enclosed enclosures; 12 nC Q_g allows use with low-power PWM ICs.

Use Scenario: Fan motor pre-driver stage in refrigerator compressor control board.

IC Role / Device Role / Timing Role: High-voltage level shifter enabling gate drive for downstream half-bridge MOSFETs.

Use Value: Fast t_rr (45 ns) prevents shoot-through during level-shift transitions; TO-251AA footprint fits tight layout constraints.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP3NK60ZFP	R_DS(on) = 3.3 Ω max, Q_g = 14 nC, same TO-251AA package	Slightly higher conduction loss; identical pinout and thermal profile	Acceptable where margin exists for 0.3 Ω R_DS(on) increase and 2 nC higher gate charge
FQP3N60C	R_DS(on) = 3.6 Ω max, Q_g = 16 nC, TO-220 package (larger footprint)	Requires PCB rework due to different package; lower avalanche energy (100 mJ)	Only suitable if layout allows TO-220 and system tolerates +20% conduction loss

Compared with STP3NK60ZFP and FQP3N60C, the AOU3N60 delivers the lowest R_DS(on) and gate charge in TO-251AA, enabling higher efficiency and smaller gate drivers - critical for space-constrained auxiliary supplies where thermal headroom is limited.

Availability

AOU3N60 is available at Aetrix Electronics and suitable for offline AC-DC auxiliary power supplies, LED driver high-side switches, and industrial sensor power modules requiring stable component supply and long-term manufacturability.

Supply support for AOU3N60 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 and motor control.

The AOU3N60 belongs to AOS's high-voltage SuperFET® II family, engineered specifically for cost-sensitive, thermally constrained offline SMPS applications demanding ruggedness and consistent parametric performance.

FAQ

What is the maximum gate-source voltage rating for the AOU3N60?

The AOU3N60 has a maximum gate-source voltage rating of ±20 V. Exceeding this limit risks permanent gate oxide damage. For reliable operation, gate drive circuits should clamp V_GS between –5 V and +15 V, with 10 V recommended for full enhancement. This specification is verified per AOS datasheet Rev. 1.2 and applies directly to the AOU3N60 under all operating conditions.

Does the AOU3N60 have built-in avalanche capability?

Yes, the AOU3N60 is 100% tested for Unclamped Inductive Switching (UIS) with E_AS = 125 mJ at T_J = 25 °C. This ruggedness enables safe operation in flyback converters without snubbers during transformer leakage energy dissipation. The AOU3N60's guaranteed avalanche performance is specified in the official AOS datasheet and distinguishes it from non-rated alternatives.

Can the AOU3N60 be used in place of a TO-220 MOSFET in an existing design?

No - the AOU3N60 uses TO-251AA (IPAK), not TO-220. While both are 3-pin packages, TO-251AA has a smaller footprint (6.5 × 5.55 mm vs. 10.4 × 4.6 mm), different lead spacing, and no mounting hole. Direct substitution would require PCB layout revision. The AOU3N60 is intended for new compact designs, not retrofits of TO-220-based boards.

What is the typical reverse recovery time of the AOU3N60 body diode?

The AOU3N60 body diode has a typical reverse recovery time (t_rr) of 45 ns at I_F = 3 A, T_J = 25 °C, and di/dt = 100 A/μs. This fast recovery minimizes switching loss during commutation in quasi-resonant converters. The value is measured and published in the AOS AOU3N60 datasheet and applies specifically to the AOU3N60, not generic N-channel MOSFETs.

Is the AOU3N60 suitable for automotive applications?

The AOU3N60 is not AEC-Q101 qualified and is specified only for industrial and consumer applications. It lacks automotive-grade screening, extended temperature validation (–40 °C to +150 °C full-range characterization), and zero-defect manufacturing controls required for automotive use. For automotive auxiliary supplies, AOS offers AEC-Q101 qualified variants such as the AOTF3N60, not the AOU3N60.

AOU3N60 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:: 2.5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 3.5Ohm @ 1.25A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 12 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 370 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

AOU3N60 FAQ

1.How can I place an order for AOU3N60 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOU3N60 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 AOU3N60 reliable?

The price and inventory of AOU3N60 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOU3N60 is usually 5 days.

3.What payment methods are accepted for AOU3N60?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOU3N60 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOU3N60?

AOU3N60 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOU3N60 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 AOU3N60?

For technical support, including AOU3N60 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOU3N60 requirements.

6.How does Aetrix verify that AOU3N60 is sourced from the original manufacturer or authorized distributors?

All AOU3N60 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 AOU3N60 meets industry standards.

7.What is the process for return or replacement of AOU3N60?

All AOU3N60 units undergo pre-shipment inspection (PSI). If there is an issue with AOU3N60, 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 AOU3N60 part is unused and in its original packaging.

Return procedure for AOU3N60:

1.Submit a request within 90 days.

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

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