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

Alpha & Omega Semiconductor Inc. AOTF7N65

Name: AOTF7N65
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOTF7N65
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOTF7N65

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: AOTF7N65.pdf

Description:: MOSFET N-CH 650V 7A TO220-3F

Quantity:: RFQ Add To RFQ list

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Inventory:9,912

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Product details

Overview

AOTF7N65 from Alpha & Omega Semiconductor is a 650 V, 7 A N-channel enhancement-mode MOSFET in TO-220F package, featuring 1.4 Ω R_DS(on) at V_GS = 10 V, 100% avalanche-rated operation, and 45 nC total gate charge - used in offline AC-DC power supplies and LED drivers.

For engineers reviewing the AOTF7N65 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, conduction loss at 7 A DC, thermal resistance under forced-air cooling, and compatibility with standard flyback controller gate drive levels.

Technical Context

The AOTF7N65 employs planar VDMOS technology with optimized cell pitch and field plate design to achieve stable 650 V blocking while maintaining low specific on-resistance. Its rugged body diode supports continuous reverse recovery in discontinuous conduction mode (DCM) flyback converters.

Designed for hard-switched topologies, the device exhibits controlled turn-on/turn-off dv/dt and di/dt characteristics, with gate threshold voltage (V_GS(th)) specified at 3.0–5.0 V and guaranteed minimum transconductance of 5.5 S at I_D = 3.5 A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	650 V - supports universal-input (85–265 VAC) offline SMPS with ≥20% safety margin over peak line voltage
I_D (continuous)	7 A @ T_C = 25°C - enables 40–60 W output power in compact TO-220F-mounted flyback designs
R_DS(on)	1.4 Ω max @ V_GS = 10 V - determines conduction loss of ≤70 W at full load in worst-case thermal condition
Q_g	45 nC - sets minimum gate driver current requirement of ~1.5 mA average for 300 kHz switching
E_AS	390 mJ - ensures single-pulse avalanche survivability during output short-circuit events without derating
R_θJC	2.5°C/W - defines junction-to-case thermal path for heatsink sizing under 7 A DC conduction

Pinout & Package

TO-220F package with insulated flange, 3-terminal configuration (Drain, Gate, Source), 15.87 mm × 10.16 mm footprint, 4.70 mm height, and 2.54 mm lead pitch. Flange is electrically isolated from Drain.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main high-side current path	Connected to primary winding hot side; requires insulated mounting hardware due to TO-220F isolation
Gate	Control electrode	Receives 10 V logic-level drive; 45 nC Q_g demands ≥1 A peak gate driver capability
Source	Reference node for gate drive	Serves as return path for load current and gate loop; must be low-inductance layout to minimize ringing

Key Features

Feature	Design Value
100% UIS tested	Guarantees single-pulse avalanche energy handling up to 390 mJ without parameter shift
Low gate charge	45 nC total charge reduces switching losses by ≥15% vs. comparable 650 V MOSFETs in 65–100 kHz flyback
Enhancement-mode	Zero gate bias ensures fail-safe off-state; no external pull-down required in standby mode
RoHS-compliant	Meets EU Directive 2011/65/EU with lead-free matte tin plating and halogen-free molding compound

Applications

LED Driver	Flyback SMPS
Use Scenario: Constant-current LED driver for street lighting operating from 220 VAC mains. IC Role / Device Role / Timing Role: Primary-side switch controlling energy transfer to secondary-side LED string. Use Value: 650 V rating accommodates 385 VDC bulk capacitor peak; 1.4 Ω R_DS(on) limits conduction loss to <1.5 W at 700 mA output.	Use Scenario: 45 W adapter for industrial control interface powering 12 V/3.7 A loads. IC Role / Device Role / Timing Role: Main power switch in DCM flyback topology synchronized to PWM controller. Use Value: 45 nC Q_g enables clean 65 kHz switching with minimal gate drive loss; TO-220F allows direct heatsink mounting.
AC-DC Adapter	Industrial Power Supply
Use Scenario: Universal-input (90–264 VAC) 36 W laptop adapter with overvoltage/overcurrent protection. IC Role / Device Role / Timing Role: Primary-side switching element in quasi-resonant flyback controller reference design. Use Value: Guaranteed V_GS(th) range (3.0–5.0 V) ensures reliable turn-on across temperature and process variation.	Use Scenario: 50 W auxiliary supply for PLC I/O modules requiring high reliability and long lifetime. IC Role / Device Role / Timing Role: Isolated DC-DC converter primary switch in harsh ambient (70°C case temperature). Use Value: 2.5°C/W R_θJC enables stable operation at 7 A with 25°C/W heatsink, meeting 10-year MTBF target.

LED Driver

Flyback SMPS

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

IC Role / Device Role / Timing Role: Primary-side switch controlling energy transfer to secondary-side LED string.

Use Value: 650 V rating accommodates 385 VDC bulk capacitor peak; 1.4 Ω R_DS(on) limits conduction loss to <1.5 W at 700 mA output.

Use Scenario: 45 W adapter for industrial control interface powering 12 V/3.7 A loads.

IC Role / Device Role / Timing Role: Main power switch in DCM flyback topology synchronized to PWM controller.

Use Value: 45 nC Q_g enables clean 65 kHz switching with minimal gate drive loss; TO-220F allows direct heatsink mounting.

AC-DC Adapter

Industrial Power Supply

Use Scenario: Universal-input (90–264 VAC) 36 W laptop adapter with overvoltage/overcurrent protection.

IC Role / Device Role / Timing Role: Primary-side switching element in quasi-resonant flyback controller reference design.

Use Value: Guaranteed V_GS(th) range (3.0–5.0 V) ensures reliable turn-on across temperature and process variation.

Use Scenario: 50 W auxiliary supply for PLC I/O modules requiring high reliability and long lifetime.

IC Role / Device Role / Timing Role: Isolated DC-DC converter primary switch in harsh ambient (70°C case temperature).

Use Value: 2.5°C/W R_θJC enables stable operation at 7 A with 25°C/W heatsink, meeting 10-year MTBF target.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP7NK60ZFP	600 V rating, 0.95 Ω R_DS(on), 35 nC Q_g, TO-220FP package	Limited to 230 VAC-only inputs due to lower V_DS; higher conduction efficiency but reduced surge margin	Select when input is fixed 230 VAC and lowest conduction loss is prioritized over universal input capability
IPP65R190C7	650 V, 0.19 Ω R_DS(on), 42 nC Q_g, TO-220 package (non-isolated flange)	Lower R_DS(on) improves efficiency but requires non-insulated heatsink mounting and has higher cost	Choose for high-efficiency 65 W+ designs where thermal budget allows non-isolated mounting and BOM cost is secondary

Compared with STP7NK60ZFP and IPP65R190C7, the AOTF7N65 delivers balanced trade-offs: sufficient 650 V margin for global mains, TO-220F insulation eliminating mounting complexity, and predictable 1.4 Ω conduction loss suitable for cost-sensitive 40–60 W industrial and lighting applications.

Availability

AOTF7N65 is available at Aetrix Electronics and suitable for offline AC-DC power supplies, LED drivers, and industrial auxiliary power supplies requiring stable component supply and long-term manufacturability.

Supply support for AOTF7N65 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 computing, consumer, and industrial markets.

The AOTF7N65 belongs to the AlphaMOS™ high-voltage discrete family, engineered for robustness and efficiency in universal-input offline power conversion systems.

FAQ

What is the maximum drain-source voltage rating for the AOTF7N65?

The AOTF7N65 has a maximum drain-source voltage rating of 650 V. This rating is guaranteed under all operating conditions per the manufacturer's datasheet and enables use in universal-input (85–265 VAC) applications with adequate safety margin. The AOTF7N65 maintains this rating across its full temperature range and lifetime, supporting reliable operation in high-line surge environments.

Does the AOTF7N65 require a heatsink in typical 45 W flyback applications?

Yes, the AOTF7N65 requires a heatsink in continuous 45 W flyback applications. With 1.4 Ω R_DS(on) and 7 A current, conduction loss exceeds 7 W at full load. Given its 2.5°C/W R_θJC, a heatsink with ≤20°C/W thermal resistance is needed to maintain T_J < 125°C. The AOTF7N65's TO-220F package supports direct mounting to insulated heatsinks without additional hardware.

Is the AOTF7N65 pin-compatible with standard TO-220 MOSFETs?

The AOTF7N65 uses a standard TO-220F outline with identical mechanical dimensions and lead spacing (2.54 mm pitch) as industry-standard TO-220 devices. However, its flange is electrically insulated - unlike conventional TO-220 - so PCB layout and mounting hardware must accommodate isolation. The AOTF7N65 shares pinout (Drain–Gate–Source) but not electrical mounting compatibility with non-isolated TO-220 parts.

What is the gate threshold voltage range for the AOTF7N65?

The AOTF7N65 has a gate threshold voltage (V_GS(th)) range of 3.0 V to 5.0 V, measured at I_D = 250 µA. This range ensures consistent turn-on behavior across process and temperature variations. The AOTF7N65 reliably switches with standard 10 V gate drive, and its threshold stability supports robust operation in flyback controllers with variable duty cycle and feedback latency.

Can the AOTF7N65 replace the AOTF7N60 in an existing design?

The AOTF7N65 can replace the AOTF7N60 only if the design requires 650 V rating and tolerates slightly higher R_DS(on) (1.4 Ω vs. 1.2 Ω). Both share TO-220F package and pinout, but the AOTF7N65 offers enhanced surge margin for 265 VAC + 15% line spikes. The AOTF7N65 introduces no layout changes, though gate drive strength should be verified due to 45 nC Q_g being 5% higher than AOTF7N60.

AOTF7N65 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-220-3 Full Pack

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):: 38.5W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F

AOTF7N65 FAQ

1.How can I place an order for AOTF7N65 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOTF7N65 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 AOTF7N65 reliable?

The price and inventory of AOTF7N65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF7N65 is usually 5 days.

3.What payment methods are accepted for AOTF7N65?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF7N65 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOTF7N65?

AOTF7N65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOTF7N65 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 AOTF7N65?

For technical support, including AOTF7N65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF7N65 requirements.

6.How does Aetrix verify that AOTF7N65 is sourced from the original manufacturer or authorized distributors?

All AOTF7N65 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 AOTF7N65 meets industry standards.

7.What is the process for return or replacement of AOTF7N65?

All AOTF7N65 units undergo pre-shipment inspection (PSI). If there is an issue with AOTF7N65, 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 AOTF7N65 part is unused and in its original packaging.

Return procedure for AOTF7N65:

1.Submit a request within 90 days.

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

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