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

Alpha & Omega Semiconductor Inc. AOTF66920L

Name: AOTF66920L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOTF66920L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOTF66920L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: AOTF66920L.pdf

Description:: MOSFET N-CH 100V 22.5/41A TO220F

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Product details

Overview

AOTF66920L from Alpha & Omega Semiconductor is a 100V N-Channel Trench Power AlphaSGT™ MOSFET in TO-220F package, rated for 41A continuous drain current at V_GS=10V, with R_DS(ON) < 8.2 mΩ and logic-level gate drive compatibility. It serves as a high-efficiency power switch in DC-DC converters and motor drives.

For engineers reviewing the AOTF66920L datasheet, pinout, applications, or equivalent options, key selection criteria include its 100V V_DS, 41A I_D, 8.2 mΩ R_DS(ON) at 10V, 10.7 mΩ at 4.5V, and 50 nC total gate charge - critical for synchronous rectification and high-frequency switching designs.

Technical Context

The AOTF66920L employs Alpha & Omega's proprietary Trench Power AlphaSGT™ technology to achieve low conduction loss and optimized switching performance. Its gate threshold voltage (1.5–2.5 V) enables reliable logic-level operation, while its 50 nC Q_g(10V) and 25 nC Q_g(4.5V) support efficient gate driving across wide input voltage ranges.

Thermally, it features R_θJC = 4.5°C/W and R_θJA = 55°C/W (1 in² FR-4, 2 oz Cu), with 100% UIS and R_g tested. The device delivers 72 mJ avalanche energy (L = 0.1 mH) and supports body-diode continuous current up to 30 A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - Maximum blocking voltage for 12–48 V bus applications with margin
I_D (V_GS=10V)	41 A - Continuous current capability at full gate drive, suitable for 200 W+ power stages
R_DS(ON) (V_GS=10V)	< 8.2 mΩ - Low conduction loss enabling <1.7 W conduction loss at 20 A
R_DS(ON) (V_GS=4.5V)	< 10.7 mΩ - Ensures robust turn-on under 5 V logic supply or PWM controller output
Q_g(10V)	35–50 nC - Gate charge value defining driver strength requirement for ≤100 kHz switching
E_AS	72 mJ - Confirmed unclamped inductive switching ruggedness for flyback and buck-boost topologies
T_J Range	−55 to +150 °C - Supports industrial and automotive under-hood ambient conditions

Pinout & Package

Package: TO-220F (Full-pack, isolated tab, vertical mounting). Thermal pad electrically connected to drain; case isolation enables direct heatsink mounting without insulator.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Control terminal; accepts logic-level (≥4.5 V) or standard 10 V drive; R_g = 0.5–1.8 Ω typical
D	Drain	Main power output node; electrically tied to metal tab; requires isolation if heatsink is grounded
S	Source	Power return and reference for gate drive; defines common node for low-side switching configuration

Key Features

Feature	Design Value
Trench Power AlphaSGT™ Technology	Enables <8.2 mΩ R_DS(ON) at 100 V while maintaining high dV/dt immunity and low Q_gd/Q_g ratio
Logic-Level Gate Drive	Guaranteed turn-on at V_GS ≥ 4.5 V (V_GS(th) = 1.5–2.5 V), compatible with microcontroller GPIO and 5 V PWM ICs
Excellent FOM (Q_g × R_DS(ON))	Q_g(10V) × R_DS(ON) ≈ 410 pC·Ω - balances switching loss vs. conduction loss in 100–500 kHz designs
100% UIS and R_g Tested	Each unit validated for avalanche ruggedness and gate resistance, ensuring reliability in inductive load switching

Applications

Server VRM Power Stage	Industrial Motor Drive Half-Bridge
Use Scenario: High-density 48 V input buck converter supplying CPU core voltage with tight transient response. IC Role / Device Role / Timing Role: Low-side synchronous rectifier MOSFET in multiphase VRM, operating at 300–600 kHz. Use Value: Sub-8.2 mΩ R_DS(ON) minimizes conduction loss; 50 nC Q_g allows fast switching with moderate gate driver ICs like TI UCC27531.	Use Scenario: 24–48 V BLDC motor control in factory automation actuators with regenerative braking. IC Role / Device Role / Timing Role: High-current half-bridge low-side switch handling 30 A peak motor phase current. Use Value: 30 A body-diode continuous rating and 72 mJ E_AS ensure safe freewheeling and inductive kick handling during PWM commutation.
Telecom DC-DC Brick	EV On-Board Charger Auxiliary Supply
Use Scenario: Isolated 48 V to 12 V intermediate bus converter in telecom rectifier modules. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier in forward or active-clamp forward topology. Use Value: 10.7 mΩ R_DS(ON) at 4.5 V enables efficient operation directly from 5 V bias rail, reducing auxiliary winding complexity.	Use Scenario: 400 V to 12 V auxiliary power supply in EV on-board chargers powering MCU, gate drivers, and sensors. IC Role / Device Role / Timing Role: Primary-side clamp or snubber switch in resonant LLC auxiliary stage. Use Value: 100 V V_DS with 150 °C max junction temperature supports operation in thermally constrained OBC enclosures with minimal derating.

Server VRM Power Stage

Industrial Motor Drive Half-Bridge

Use Scenario: High-density 48 V input buck converter supplying CPU core voltage with tight transient response.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier MOSFET in multiphase VRM, operating at 300–600 kHz.

Use Value: Sub-8.2 mΩ R_DS(ON) minimizes conduction loss; 50 nC Q_g allows fast switching with moderate gate driver ICs like TI UCC27531.

Use Scenario: 24–48 V BLDC motor control in factory automation actuators with regenerative braking.

IC Role / Device Role / Timing Role: High-current half-bridge low-side switch handling 30 A peak motor phase current.

Use Value: 30 A body-diode continuous rating and 72 mJ E_AS ensure safe freewheeling and inductive kick handling during PWM commutation.

Telecom DC-DC Brick

EV On-Board Charger Auxiliary Supply

Use Scenario: Isolated 48 V to 12 V intermediate bus converter in telecom rectifier modules.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier in forward or active-clamp forward topology.

Use Value: 10.7 mΩ R_DS(ON) at 4.5 V enables efficient operation directly from 5 V bias rail, reducing auxiliary winding complexity.

Use Scenario: 400 V to 12 V auxiliary power supply in EV on-board chargers powering MCU, gate drivers, and sensors.

IC Role / Device Role / Timing Role: Primary-side clamp or snubber switch in resonant LLC auxiliary stage.

Use Value: 100 V V_DS with 150 °C max junction temperature supports operation in thermally constrained OBC enclosures with minimal derating.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP110N10F7	100 V, 110 A, R_DS(ON) = 6.5 mΩ @ 10 V, TO-220FP package, higher current but larger die size	Higher I_D rating suits higher-power inverters; less optimized for 4.5 V drive (V_GS(th) = 2.5–4.5 V)	Select when >60 A continuous current needed and gate drive ≥10 V is available
IRF540N	100 V, 33 A, R_DS(ON) = 44 mΩ @ 10 V, TO-220 package, legacy planar process, no UIS rating	Lower cost but significantly higher conduction loss; unsuitable for high-frequency or avalanche-prone circuits	Select only for low-frequency, non-critical linear or switching applications where efficiency and ruggedness are secondary

Compared with STP110N10F7 and IRF540N, the AOTF66920L offers superior 4.5 V drive capability, lower R_DS(ON), and guaranteed UIS performance - making it optimal for compact, high-efficiency, logic-driven power stages where thermal and space constraints exist.

Availability

AOTF66920L is available at Aetrix Electronics and suitable for server VRMs, industrial motor drives, telecom DC-DC bricks, and EV auxiliary power supplies requiring stable component supply and long-term manufacturability.

Supply support for AOTF66920L 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-performance MOSFETs, IGBTs, and power ICs for computing, consumer, industrial, and automotive markets.

The AOTF66920L belongs to AOS's AlphaSGT™ family, engineered specifically for high-efficiency, high-frequency power conversion systems demanding low R_DS(ON), logic-level drive, and robust avalanche capability.

FAQ

What is the maximum continuous drain current for AOTF66920L at 100°C case temperature?

The AOTF66920L supports 26 A continuous drain current at T_C = 100°C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits of the TO-220F package with R_θJC = 4.5°C/W and maximum junction temperature of 150°C. Designers must verify heatsink performance to sustain this current in steady-state operation.

Does AOTF66920L support 5 V logic-level gate drive in practice?

Yes, the AOTF66920L is explicitly characterized for logic-level operation: V_GS(th) is 1.5–2.5 V, and R_DS(ON) is guaranteed <10.7 mΩ at V_GS = 4.5 V. Real-world validation includes 100% R_g testing and gate-charge curves confirming full enhancement at 5 V, making it suitable for direct drive from 5 V microcontrollers or PWM controllers.

What is the avalanche energy rating of AOTF66920L, and how is it tested?

The AOTF66920L is rated for 72 mJ single-pulse avalanche energy (E_AS) with L = 0.1 mH, per the datasheet's Absolute Maximum Ratings. It undergoes 100% Unclamped Inductive Switching (UIS) testing on every production unit - a stress test that validates ruggedness against inductive turn-off transients in real-world motor and converter applications.

Is the TO-220F package of AOTF66920L electrically isolated?

Yes, the TO-220F (Full-pack) package used by AOTF66920L features an electrically isolated metal tab. While the drain is connected to the tab, the mounting surface is insulated - enabling direct attachment to a grounded heatsink without additional isolation hardware, simplifying thermal design and reducing bill-of-materials cost.

What is the typical gate charge (Q_g) of AOTF66920L at 10 V, and why does it matter?

The AOTF66920L has a typical total gate charge Q_g of 42.5 nC at V_GS = 10 V (min 35 nC, max 50 nC). This parameter determines gate driver power requirements and switching speed: lower Q_g reduces driver losses and enables faster transitions, directly impacting efficiency in 100–500 kHz power converters where the AOTF66920L is commonly deployed.

AOTF66920L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: AlphaSGT™

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

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 22.5A (Ta), 41A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 8.2mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 50 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 2500 pF @ 50 V

FET Feature:: -

Power Dissipation (Max):: 8.3W (Ta), 27.5W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F

AOTF66920L FAQ

1.How can I place an order for AOTF66920L through Aetrix?

Please submit a Request for Quotation (RFQ) for AOTF66920L 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 AOTF66920L reliable?

The price and inventory of AOTF66920L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF66920L is usually 5 days.

3.What payment methods are accepted for AOTF66920L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF66920L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOTF66920L?

AOTF66920L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOTF66920L 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 AOTF66920L?

For technical support, including AOTF66920L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF66920L requirements.

6.How does Aetrix verify that AOTF66920L is sourced from the original manufacturer or authorized distributors?

All AOTF66920L 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 AOTF66920L meets industry standards.

7.What is the process for return or replacement of AOTF66920L?

All AOTF66920L units undergo pre-shipment inspection (PSI). If there is an issue with AOTF66920L, 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 AOTF66920L part is unused and in its original packaging.

Return procedure for AOTF66920L:

1.Submit a request within 90 days.

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

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