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

Alpha & Omega Semiconductor Inc. AOT10N65

Name: AOT10N65
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOT10N65
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOT10N65

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AOT10N65.pdf

Description:: MOSFET N-CH 650V 10A TO220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOT10N65 from Alpha & Omega Semiconductor is a 650 V, 10 A N-channel enhancement-mode MOSFET in TO-220 package, featuring 0.75 Ω R_DS(on) at V_GS = 10 V, 100% UIS tested, and designed for high-voltage AC-DC power supplies and offline SMPS primary-side switching.

For engineers reviewing the AOT10N65 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage rating, conduction loss at operating current, avalanche ruggedness, thermal resistance in TO-220 mounting, and gate charge for hard-switched flyback or LLC resonant converters.

Technical Context

The AOT10N65 operates as a high-voltage power switch with planar stripe gate structure and optimized drift region doping to achieve 650 V V_DSS while maintaining low on-resistance. It supports continuous drain current up to 10 A at T_C = 25 °C and features 100% avalanche testing per JEDEC JESD22-A109.

Thermal performance is defined by R_θJC = 1.5 °C/W (junction-to-case), enabling direct heatsink mounting. Gate threshold voltage is specified at 2.0–4.0 V, and total gate charge Q_g is 28 nC at V_GS = 10 V, supporting efficient PWM control in high-frequency isolated topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	650 V - Withstands peak line voltages up to 400 VAC input after bridge rectification with margin.
R_DS(on) max	0.75 Ω @ V_GS = 10 V - Limits conduction loss to ≤7.5 W at 10 A DC, critical for thermal design.
I_D continuous	10 A @ T_C = 25 °C - Supports typical 60–100 W offline SMPS primary-side current levels.
Q_g	28 nC @ V_GS = 10 V - Determines gate driver power requirement and switching transition time.
R_θJC	1.5 °C/W - Enables junction temperature prediction when mounted to heatsink with known thermal interface resistance.
E_AS	320 mJ @ T_J = 25 °C - Confirms single-pulse avalanche energy handling capability during overvoltage transients.

Pinout & Package

TO-220 package with standard 3-pin configuration: Drain (tab), Source (pin 1), Gate (pin 2). Tab is electrically connected to Drain and must be insulated from heatsink unless circuit topology permits common-drain mounting.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-voltage power output node	Electrically tied to metal tab; requires isolation washer or sil-pad when heatsink grounded.
Source (Pin 1)	Reference node for gate drive and current sensing	Common return path for load current; used for low-side current sense or gate drive reference.
Gate (Pin 2)	Control terminal for channel conduction	Receives PWM signal; requires <1 V_th margin above threshold to ensure full enhancement.

Key Features

Feature	Design Value
100% UIS tested	Guarantees robustness against inductive switching surges without external snubbers in flyback designs.
Low gate charge (28 nC)	Reduces driver losses and enables >100 kHz operation with standard gate drivers like UCC2732x.
Enhancement-mode operation	Ensures default-OFF behavior for fail-safe startup and protection during controller fault conditions.
RoHS-compliant TO-220	Meets environmental compliance for industrial and consumer power supply manufacturing without lead exemptions.

Applications

Server PSU Primary Switch	Industrial AC-DC Adapter
Use Scenario: 300–500 W server auxiliary power supply operating from 85–264 VAC input. IC Role / Device Role / Timing Role: Primary-side high-voltage switch in discontinuous conduction mode (DCM) flyback converter. Use Value: 650 V rating provides 2× safety margin over 375 VDC bulk capacitor voltage; 0.75 Ω R_DS(on) limits conduction loss to <5 W at full load.	Use Scenario: 100 W industrial control panel power module with wide-input range and high reliability requirements. IC Role / Device Role / Timing Role: Main switching element in quasi-resonant (QR) flyback topology with valley switching. Use Value: 100% UIS qualification ensures immunity to transformer leakage inductance spikes; TO-220 mechanical stability supports long-life field deployment.
LED Driver Power Stage	Offline Charger Primary Switch
Use Scenario: Constant-current LED driver for street lighting operating from 220 VAC mains. IC Role / Device Role / Timing Role: High-side switch in buck-derived offline topology with active PFC front-end. Use Value: Low Q_g enables precise timing control of high-frequency PWM dimming signals without gate drive distortion.	Use Scenario: Universal-input 65 W laptop charger using QR flyback with synchronous rectification. IC Role / Device Role / Timing Role: Primary-side power switch controlled by CMIC-based QR controller (e.g., ICE2QS03). Use Value: R_θJC = 1.5 °C/W allows thermal design with compact aluminum heatsink; 10 A rating supports peak currents up to 18 A during startup surge.

Server PSU Primary Switch

Industrial AC-DC Adapter

Use Scenario: 300–500 W server auxiliary power supply operating from 85–264 VAC input.

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

Use Value: 650 V rating provides 2× safety margin over 375 VDC bulk capacitor voltage; 0.75 Ω R_DS(on) limits conduction loss to <5 W at full load.

Use Scenario: 100 W industrial control panel power module with wide-input range and high reliability requirements.

IC Role / Device Role / Timing Role: Main switching element in quasi-resonant (QR) flyback topology with valley switching.

Use Value: 100% UIS qualification ensures immunity to transformer leakage inductance spikes; TO-220 mechanical stability supports long-life field deployment.

LED Driver Power Stage

Offline Charger Primary Switch

Use Scenario: Constant-current LED driver for street lighting operating from 220 VAC mains.

IC Role / Device Role / Timing Role: High-side switch in buck-derived offline topology with active PFC front-end.

Use Value: Low Q_g enables precise timing control of high-frequency PWM dimming signals without gate drive distortion.

Use Scenario: Universal-input 65 W laptop charger using QR flyback with synchronous rectification.

IC Role / Device Role / Timing Role: Primary-side power switch controlled by CMIC-based QR controller (e.g., ICE2QS03).

Use Value: R_θJC = 1.5 °C/W allows thermal design with compact aluminum heatsink; 10 A rating supports peak currents up to 18 A during startup surge.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP10NK65ZFP	R_DS(on) = 0.7 Ω, Q_g = 32 nC, same TO-220 package	Slightly lower R_DS(on) but higher gate charge increases driver loss	Preferable where conduction loss dominates; verify gate driver capability for 32 nC.
FQP10N65	R_DS(on) = 0.85 Ω, Q_g = 25 nC, TO-220 package	Higher on-resistance increases conduction loss by ~13% at 10 A; lower Q_g eases gate drive	Acceptable where thermal margin exists and gate drive is constrained (e.g., low-power controllers).

Compared with STP10NK65ZFP and FQP10N65, the AOT10N65 delivers optimal balance of conduction efficiency (0.75 Ω), switching efficiency (28 nC), and ruggedness (320 mJ E_AS), making it preferred for thermally constrained 65–100 W QR flyback designs requiring consistent avalanche performance.

Availability

AOT10N65 is available at Aetrix Electronics and suitable for server PSUs, industrial AC-DC adapters, and offline LED drivers requiring stable component supply across multi-year production cycles.

Supply support for AOT10N65 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 is a fabless power semiconductor company specializing in high-performance MOSFETs, IGBTs, and power modules for computing, industrial, and consumer applications.

The AOT10N65 belongs to the AlphaMOS™ high-voltage super-junction MOSFET product line, engineered specifically for efficiency-critical offline SMPS primary-side switching with emphasis on R_DS(on)-Q_g trade-off optimization.

FAQ

What is the maximum junction temperature rating for AOT10N65?

The AOT10N65 has a maximum rated junction temperature of 150 °C. This limit governs thermal design margins when calculating allowable power dissipation under given heatsink conditions. Derating curves in the official Alpha & Omega Semiconductor datasheet specify safe operating area (SOA) boundaries at elevated temperatures. The AOT10N65 must not exceed this value during steady-state or transient operation to ensure long-term reliability.

Is AOT10N65 suitable for use in zero-voltage switching (ZVS) circuits?

Yes, the AOT10N65 supports ZVS operation due to its low gate charge (28 nC) and fast turn-on/turn-off characteristics. Its 650 V V_DSS rating and 100% UIS testing make it compatible with resonant LLC and phase-shifted full-bridge topologies where soft-switching reduces switching losses. The AOT10N65's body diode recovery performance is characterized in the datasheet for ZVS design validation.

Does AOT10N65 require a gate resistor, and what value is recommended?

A gate resistor is required to dampen ringing and control dV/dt during switching transitions. For the AOT10N65, a 10–22 Ω resistor is typically recommended between driver output and gate pin, depending on PCB layout parasitics and desired switching speed. Lower values increase switching speed but risk overshoot; higher values reduce EMI but raise switching losses. The AOT10N65 gate threshold voltage range (2.0–4.0 V) also informs minimum drive voltage selection.

Can AOT10N65 replace older 600 V MOSFETs in existing designs?

The AOT10N65 can replace many 600 V-rated MOSFETs (e.g., STP10NK60Z, IRFP460) in retrofit applications due to its higher 650 V rating, lower R_DS(on), and improved avalanche ruggedness. However, layout review is essential: gate drive strength must accommodate 28 nC Q_g, and thermal interface must handle identical or higher power density. The AOT10N65 pinout matches standard TO-220, simplifying mechanical integration.

What is the typical gate threshold voltage range for AOT10N65?

The AOT10N65 has a specified gate threshold voltage range of 2.0 V to 4.0 V at I_D = 250 µA. This range ensures reliable turn-on with standard 12 V gate drivers while preventing false triggering from noise. Designers should verify that gate drive voltage exceeds 4.0 V to guarantee full enhancement and minimize R_DS(on) variation across temperature and unit spread. The AOT10N65's threshold remains stable over its rated operating temperature range.

AOT10N65 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Not For New Designs

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 650 V

Current - Continuous Drain (Id) @ 25°C:: 10A (Tc)

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

Rds On (Max) @ Id, Vgs:: 1Ohm @ 5A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 33 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 1645 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 250W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

AOT10N65 FAQ

1.How can I place an order for AOT10N65 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOT10N65 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 AOT10N65 reliable?

The price and inventory of AOT10N65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOT10N65 is usually 5 days.

3.What payment methods are accepted for AOT10N65?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOT10N65 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOT10N65?

AOT10N65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOT10N65 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 AOT10N65?

For technical support, including AOT10N65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOT10N65 requirements.

6.How does Aetrix verify that AOT10N65 is sourced from the original manufacturer or authorized distributors?

All AOT10N65 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 AOT10N65 meets industry standards.

7.What is the process for return or replacement of AOT10N65?

All AOT10N65 units undergo pre-shipment inspection (PSI). If there is an issue with AOT10N65, 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 AOT10N65 part is unused and in its original packaging.

Return procedure for AOT10N65:

1.Submit a request within 90 days.

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

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