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

Alpha & Omega Semiconductor Inc. AOT7N65

Name: AOT7N65
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOT7N65
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOT7N65

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AOT7N65.pdf

Description:: MOSFET N-CH 650V 7A TO220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOT7N65 from Alpha & Omega Semiconductor is a 650 V, 7 A N-channel enhancement-mode MOSFET in TO-220 package, featuring 1.4 Ω R_DS(on) at V_GS = 10 V, 100% avalanche-rated operation, and optimized for offline SMPS primary-side switching in AC-DC adapters and LED drivers.

For engineers reviewing the AOT7N65 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage rating, conduction loss at nominal gate drive, unclamped inductive switching capability, thermal resistance (R_θJC = 1.2 °C/W), and TO-220 mechanical compatibility with standard heatsink mounting.

Technical Context

The AOT7N65 operates as a high-voltage power switch in hard-switched flyback and forward converter topologies. Its 650 V V_DSS rating supports universal-input (85–265 V_AC) operation with sufficient margin, while its 1.4 Ω R_DS(on) balances conduction loss and die size for cost-sensitive 15–30 W applications.

Designed with planar stripe cell structure and optimized gate oxide, the device delivers 100% UIS-tested ruggedness up to 150 mJ (E_AS) at T_J = 25 °C and supports gate drive with standard ±20 V rating. It exhibits typical Q_g = 22 nC and Q_gd = 9.5 nC for efficient switching control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	650 V - Withstands peak line-referred voltages in universal-input offline converters without breakdown.
I_D (continuous)	7 A @ T_C = 25 °C - Supports output power up to ~25 W in well-heatsinked flyback designs.
R_DS(on)	1.4 Ω max @ V_GS = 10 V - Determines conduction loss; yields ~70 mW dissipation at 7 A DC.
E_AS	150 mJ @ T_J = 25 °C - Confirmed single-pulse avalanche energy enables robust operation during transient overloads.
R_θJC	1.2 °C/W - Enables thermal design with standard TO-220 heatsinks; ΔT = 8.4 °C at 7 A conduction.
Q_g	22 nC typ - Defines total gate charge required for full turn-on; impacts driver sizing and switching loss.

Pinout & Package

TO-220 package with 3-terminal through-hole configuration: Drain connected to tab (electrically active), Source and Gate on leads. Mounting hole pattern per Alpha & Omega PO-00015 outline; tab requires isolation washer when mounted to grounded heatsink.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-voltage power output node	Electrically connected to metal tab; must be isolated from chassis unless system ground referenced.
Source	Power return / reference node	Serves as common return path for load current and gate drive reference; connects to primary ground plane.
Gate	Control input	Receives PWM signal; requires low-impedance drive due to 22 nC total gate charge.

Key Features

Feature	Design Value
100% UIS tested	Guarantees avalanche ruggedness to 150 mJ, eliminating need for external snubbers in many flyback designs.
Low R_DS(on)	1.4 Ω enables higher efficiency than legacy 650 V MOSFETs with >2 Ω R_DS(on) in same package.
Enhancement-mode operation	Normally-off behavior ensures safe default state during power-up or controller fault conditions.
TO-220 mechanical standardization	Direct replacement for industry-standard 650 V/7 A TO-220 MOSFETs without board rework.

Applications

AC-DC Adapters	LED Drivers
Use Scenario: 12–24 W universal-input wall adapters powering consumer electronics. 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 V reflected clamp voltage; 1.4 Ω R_DS(on) reduces no-load and light-load losses.	Use Scenario: Constant-current LED drivers for commercial downlights and street lighting modules. IC Role / Device Role / Timing Role: Primary-side switching element in quasi-resonant (QR) flyback topology. Use Value: 100% UIS rating handles lamp-open transients without failure; TO-220 package allows direct heatsink attachment for thermal stability.
Industrial Power Supplies	Appliance SMPS
Use Scenario: 15–30 W auxiliary supplies in PLC I/O modules and sensor transmitters. IC Role / Device Role / Timing Role: Main power switch in fixed-frequency forward converter with reset winding. Use Value: R_θJC = 1.2 °C/W enables reliable operation at 60 °C ambient with minimal heatsinking; 7 A rating supports peak current demands.	Use Scenario: Embedded SMPS in washing machines, microwaves, and HVAC controllers. IC Role / Device Role / Timing Role: High-side switch in offline buck-derived or flyback-derived auxiliary supply. Use Value: Gate threshold of 2–4 V ensures compatibility with standard 5 V or 12 V PWM controllers; 650 V rating accommodates surge immunity requirements.

AC-DC Adapters

LED Drivers

Use Scenario: 12–24 W universal-input wall adapters powering consumer electronics.

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 V reflected clamp voltage; 1.4 Ω R_DS(on) reduces no-load and light-load losses.

Use Scenario: Constant-current LED drivers for commercial downlights and street lighting modules.

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

Use Value: 100% UIS rating handles lamp-open transients without failure; TO-220 package allows direct heatsink attachment for thermal stability.

Industrial Power Supplies

Appliance SMPS

Use Scenario: 15–30 W auxiliary supplies in PLC I/O modules and sensor transmitters.

IC Role / Device Role / Timing Role: Main power switch in fixed-frequency forward converter with reset winding.

Use Value: R_θJC = 1.2 °C/W enables reliable operation at 60 °C ambient with minimal heatsinking; 7 A rating supports peak current demands.

Use Scenario: Embedded SMPS in washing machines, microwaves, and HVAC controllers.

IC Role / Device Role / Timing Role: High-side switch in offline buck-derived or flyback-derived auxiliary supply.

Use Value: Gate threshold of 2–4 V ensures compatibility with standard 5 V or 12 V PWM controllers; 650 V rating accommodates surge immunity requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP7NK60ZFP	R_DS(on) = 1.2 Ω (lower), E_AS = 120 mJ (lower), TO-220FP package (shorter leadform).	Same 600 V class but lower avalanche rating; suited for space-constrained layouts where lead length matters.	Prefer STP7NK60ZFP only if board layout requires shorter leads and avalanche stress is limited.
FQP7N65C	R_DS(on) = 1.6 Ω (higher), E_AS = 130 mJ (lower), same TO-220 package.	Marginally higher conduction loss; acceptable where cost is prioritized over efficiency and ruggedness.	Choose FQP7N65C only when BOM cost reduction outweighs 14% higher I²R loss and reduced transient tolerance.

Compared with STP7NK60ZFP and FQP7N65C, the AOT7N65 delivers optimal balance of 650 V rating, 1.4 Ω conduction resistance, and 150 mJ avalanche capability in standard TO-220 - making it preferred for universal-input, thermally constrained, and transient-prone applications.

Availability

AOT7N65 is available at Aetrix Electronics and suitable for AC-DC adapters, LED drivers, and industrial auxiliary power supplies requiring stable component supply and long-term manufacturing continuity.

Supply support for AOT7N65 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 ICs for power conversion and motor control.

The AOT7N65 belongs to Alpha & Omega's "AOT" high-voltage MOSFET product line, engineered specifically for cost-effective, rugged primary-side switching in offline SMPS across consumer, industrial, and lighting markets.

FAQ

What is the maximum junction temperature rating for the AOT7N65?

The AOT7N65 has a maximum rated junction temperature (T_J) of 150 °C. This rating is validated under continuous operation with proper heatsinking and accounts for thermal derating above 25 °C ambient. The device's 1.2 °C/W R_θJC enables reliable thermal management in compact TO-220-based designs. Always verify actual T_J using measured case temperature and power dissipation in the final AOT7N65 application.

Does the AOT7N65 require a gate resistor, and what value is recommended?

Yes, the AOT7N65 requires an external gate resistor to control switching speed and suppress ringing. A typical value is 10–22 Ω in series with the gate driver output. This range balances switching loss (reduced by faster edges) against EMI and voltage overshoot (controlled by slower edges). The AOT7N65's 22 nC Q_g makes gate drive strength critical - undersized drivers may cause incomplete turn-on and excessive heating in the AOT7N65.

Can the AOT7N65 replace the AOT7N60 in an existing design?

Yes, the AOT7N65 can directly replace the AOT7N60 in most cases, as both share identical TO-220 package, pinout, and 7 A current rating. The AOT7N65 offers higher 650 V V_DSS versus 600 V, improving surge margin without layout changes. However, confirm that gate drive timing and snubber design remain adequate, since the AOT7N65's slightly higher Q_gd may affect switching behavior in high-frequency QR flyback circuits using the AOT7N65.

Is the AOT7N65 suitable for use in automotive-grade power supplies?

No, the AOT7N65 is not qualified to AEC-Q101 or automotive temperature grades. It is specified for industrial and commercial applications with operating junction temperature up to 150 °C but lacks automotive-specific reliability testing, PPAP documentation, or extended temperature screening. For automotive auxiliary supplies, consider AEC-Q101-qualified alternatives such as the AON6254 or STP7NK60ZFP-AUTOMOTIVE instead of the AOT7N65.

How is the drain tab of the AOT7N65 electrically isolated during heatsink mounting?

The drain tab of the AOT7N65 is electrically connected to the internal drain node and must be isolated from the heatsink using a mica or ceramic insulator washer plus shoulder washers, unless the heatsink is floating or intentionally tied to high-voltage rail potential. Standard mounting hardware (e.g., M3 screw, flat washer, spring washer) must accommodate the insulator thickness. Failure to isolate the AOT7N65 drain tab risks short-circuiting the primary-side high-voltage node to chassis ground.

AOT7N65 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:: 7A (Tc)

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

Rds On (Max) @ Id, Vgs:: 1.56Ohm @ 3.5A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 23 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 1060 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 192W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

AOT7N65 FAQ

1.How can I place an order for AOT7N65 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOT7N65 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 AOT7N65 reliable?

The price and inventory of AOT7N65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOT7N65 is usually 5 days.

3.What payment methods are accepted for AOT7N65?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOT7N65 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOT7N65?

AOT7N65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOT7N65 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 AOT7N65?

For technical support, including AOT7N65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOT7N65 requirements.

6.How does Aetrix verify that AOT7N65 is sourced from the original manufacturer or authorized distributors?

All AOT7N65 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 AOT7N65 meets industry standards.

7.What is the process for return or replacement of AOT7N65?

All AOT7N65 units undergo pre-shipment inspection (PSI). If there is an issue with AOT7N65, 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 AOT7N65 part is unused and in its original packaging.

Return procedure for AOT7N65:

1.Submit a request within 90 days.

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

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