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

Alpha & Omega Semiconductor Inc. AON7140

Name: AON7140
Brand: Alpha & Omega Semiconductor Inc.
SKU: AON7140
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AON7140

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-PowerWDFN

Datasheet:: AON7140.pdf

Description:: MOSFET N-CHANNEL 40V 50A 8DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AON7140 from Alpha & Omega Semiconductor is a 40V, 148A N-channel Trench Power MOSFET in DFN 3.3×3.3 package, optimized for high-current synchronous rectification and motor drive with R_DS(ON) < 2.3 mΩ at V_GS=10V and < 3.5 mΩ at V_GS=4.5V, supporting 12V–24V DC systems.

For engineers reviewing the AON7140 datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Q_g=42–60 nC), 100% UIS-tested ruggedness, body-diode reverse recovery performance (t_rr=16 ns, Q_rr=42 nC), and thermal resistance R_θJC=1.4°C/W for high-power-density designs.

Technical Context

The AON7140 employs Trench Power MV MOSFET technology to achieve ultra-low on-resistance and fast switching dynamics. Its gate threshold voltage (1.4–2.4 V) enables robust 4.5V logic-level drive compatibility, while the integrated low-R_DS(ON) silicon supports high-efficiency power conversion in compact layouts.

Thermal design is enabled by the exposed-drain DFN package delivering R_θJC=1.4°C/W and R_θJA=60°C/W on standard FR-4. The device is fully characterized for unclamped inductive switching (UIS) and avalanche energy (E_AS=135 mJ), confirming reliability under transient overloads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage for 12V–24V system bus protection and switching
I_D (V_GS=10V)	148 A - Continuous drain current rating at TC=100°C, enabling high-current synchronous rectifiers
R_DS(ON) (V_GS=10V)	< 2.3 mΩ - Enables <1W conduction loss at 50A, critical for thermally constrained DC-DC converters
R_DS(ON) (V_GS=4.5V)	< 3.5 mΩ - Ensures full enhancement with 5V microcontroller GPIOs without level-shifting
Q_g (10V)	42–60 nC - Low gate charge reduces driver power and switching losses in high-frequency operation
t_rr / Q_rr	16 ns / 42 nC - Fast body-diode recovery minimizes shoot-through risk and EMI in half-bridge topologies
R_θJC	1.4 °C/W - Exposed-drain thermal path allows direct heatsinking for >89W steady-state dissipation at T_C=100°C

Pinout & Package

Package: DFN 3.3×3.3 mm, 8-pin, exposed-drain thermal pad (pins 1–4 and 5–8 are source-connected; pin 3 is gate; pins 6–7 are drain).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8	Source (S)	Low-impedance return path tied to PCB ground plane; multiple pins reduce bond-wire inductance
3	Gate (G)	Control input requiring <60 nC total charge; sensitive to ESD and layout parasitics
6, 7	Drain (D)	High-current output node connected to exposed thermal pad; must be routed with minimum loop area

Key Features

Feature	Design Value
100% UIS tested	Guarantees avalanche ruggedness up to 135 mJ (L=0.3 mH), eliminating need for external snubbers in inductive loads
100% R_g tested	Ensures gate resistance between 0.4–1.3 Ω, stabilizing switching speed and reducing gate oscillation risk
Trench Power MV technology	Delivers industry-leading R_DS(ON) × Q_g figure-of-merit for high-frequency, high-efficiency operation
Low Q_gd/Q_g ratio	3.5/60 ≈ 5.8% - Minimizes Miller effect, enabling stable hard-switching up to 1 MHz
Body-diode optimized	V_SD=0.67 V (typ), t_rr=16 ns - Reduces reverse-recovery losses in synchronous buck and OR-ing applications

Applications

Synchronous Rectification in AC-DC Adapters	12V–24V Brushless DC Motor Drive
Use Scenario: Replacing Schottky diodes in secondary-side rectification of 65–240W laptop adapters and industrial PSUs. IC Role / Device Role / Timing Role: High-side synchronous rectifier switch controlled by PWM controller's gate driver output. Use Value: Cuts conduction loss by >40% vs. 40V Schottky, improving efficiency from 89% to 93% at full load.	Use Scenario: Half-bridge high-side switch in automotive HVAC blower or power seat control modules. IC Role / Device Role / Timing Role: N-channel high-side switch driven via bootstrap gate driver in 20–50 kHz PWM inverters. Use Value: Enables 148A peak current handling with <2.3 mΩ R_DS(ON), reducing junction temperature rise by 22°C vs. legacy TO-252 parts.
OR-ing for Redundant Power Supplies	Hot-Swap Controller Back-End Switch
Use Scenario: Parallel 12V/24V DC inputs in telecom shelf power distribution with automatic fault isolation. IC Role / Device Role / Timing Role: Low-loss forward-path switch with fast turn-off to prevent backfeed during input failure. Use Value: Achieves <3.5 mΩ on-resistance at 4.5V drive, limiting voltage drop to <0.52 V at 150A and enabling <100 ns fault response.	Use Scenario: Inrush-limiting and short-circuit protected output stage in enterprise server hot-swap cards. IC Role / Device Role / Timing Role: Load switch managed by dedicated hot-swap controller IC (e.g., LTC4215) for current monitoring and foldback. Use Value: With 100% UIS qualification and 550A pulsed rating, sustains 200A surge events without latch-up or parametric shift.

Synchronous Rectification in AC-DC Adapters

12V–24V Brushless DC Motor Drive

Use Scenario: Replacing Schottky diodes in secondary-side rectification of 65–240W laptop adapters and industrial PSUs.

IC Role / Device Role / Timing Role: High-side synchronous rectifier switch controlled by PWM controller's gate driver output.

Use Value: Cuts conduction loss by >40% vs. 40V Schottky, improving efficiency from 89% to 93% at full load.

Use Scenario: Half-bridge high-side switch in automotive HVAC blower or power seat control modules.

IC Role / Device Role / Timing Role: N-channel high-side switch driven via bootstrap gate driver in 20–50 kHz PWM inverters.

Use Value: Enables 148A peak current handling with <2.3 mΩ R_DS(ON), reducing junction temperature rise by 22°C vs. legacy TO-252 parts.

OR-ing for Redundant Power Supplies

Hot-Swap Controller Back-End Switch

Use Scenario: Parallel 12V/24V DC inputs in telecom shelf power distribution with automatic fault isolation.

IC Role / Device Role / Timing Role: Low-loss forward-path switch with fast turn-off to prevent backfeed during input failure.

Use Value: Achieves <3.5 mΩ on-resistance at 4.5V drive, limiting voltage drop to <0.52 V at 150A and enabling <100 ns fault response.

Use Scenario: Inrush-limiting and short-circuit protected output stage in enterprise server hot-swap cards.

IC Role / Device Role / Timing Role: Load switch managed by dedicated hot-swap controller IC (e.g., LTC4215) for current monitoring and foldback.

Use Value: With 100% UIS qualification and 550A pulsed rating, sustains 200A surge events without latch-up or parametric shift.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Infineon IPP036N04L	R_DS(ON) = 3.6 mΩ @ 10V; Q_g = 44 nC; TO-252 package	Larger footprint and higher R_DS(ON) limit use in space-constrained 24V motor drives	Prefer when board-level heatsinking is available and cost sensitivity outweighs size constraints
Vishay SiR872DP	R_DS(ON) = 2.2 mΩ @ 10V; Q_g = 64 nC; PowerPAK® 3.3×3.3	Higher gate charge increases driver losses above 500 kHz; no 100% UIS test documentation	Select when absolute lowest R_DS(ON) is prioritized and switching frequency remains ≤300 kHz

Compared with IPP036N04L and SiR872DP, the AON7140 delivers superior thermal performance (R_θJC=1.4°C/W), tighter gate resistance screening, and documented UIS ruggedness-making it optimal for high-reliability, high-power-density 12V–24V systems where layout area and transient immunity are critical.

Availability

AON7140 is available at Aetrix Electronics and suitable for synchronous rectification in AC-DC/DC-DC converters, 12V–24V BLDC motor drives, and OR-ing switches requiring stable component supply across industrial, computing, and automotive auxiliary systems.

Supply support for AON7140 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 AON7140 belongs to AOS's Trench Power MV MOSFET product line, engineered specifically for high-current, high-efficiency DC-DC conversion and motor control in compact, thermally demanding applications.

FAQ

What is the maximum continuous drain current rating for the AON7140?

The AON7140 has a continuous drain current rating of 148 A at T_C=100°C, verified under steady-state thermal conditions with proper heatsinking. This rating assumes the device is mounted on a PCB with adequate copper area and airflow. At T_A=25°C with no heatsink, the derated current is 48 A due to higher junction-to-ambient thermal resistance. Always refer to Figure 13 in the AON7140 datasheet for precise de-rating curves.

Does the AON7140 support 4.5V logic-level gate drive?

Yes, the AON7140 is fully specified for 4.5V gate drive, with R_DS(ON) guaranteed at < 3.5 mΩ under that condition. Its gate threshold voltage range (1.4–2.4 V) ensures reliable turn-on with standard 5V microcontrollers and gate drivers. The low Q_g(4.5V)=18–26 nC further confirms suitability for logic-level operation without excessive driver power consumption.

Is the AON7140 qualified for automotive applications?

No-the AON7140 is explicitly designed and qualified for the consumer market per its datasheet disclaimer. It is not AEC-Q101 qualified and is not authorized for use in life-support devices or safety-critical automotive systems. For automotive-grade alternatives, consult AOS's AUIRF series or contact Aetrix Electronics for AEC-Q101-compliant equivalents to the AON7140.

What thermal resistance values apply to the AON7140 in typical PCB mounting?

In standard mounting on 1 in² FR-4 with 2 oz copper, the AON7140 exhibits R_θJA=60°C/W (junction-to-ambient) and R_θJC=1.4°C/W (junction-to-case). The latter enables direct thermal coupling to a heatsink or copper pour, supporting up to 89 W power dissipation at T_C=100°C. These values are measured per JEDEC JESD51-2 and JESD51-14 standards.

How is avalanche ruggedness validated for the AON7140?

The AON7140 undergoes 100% unclamped inductive switching (UIS) testing per JEDEC JESD24-1, with E_AS=135 mJ rated at L=0.3 mH and T_J=25°C. Each unit is screened to ensure it withstands this single-pulse avalanche energy without parametric shift or failure. This validation supports reliable operation in motor drive and converter circuits subject to inductive kickback transients.

AON7140 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: 8-PowerWDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 50A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2.3mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2.4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 60 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 3350 pF @ 20 V

FET Feature:: -

Power Dissipation (Max):: 46W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN-EP (3.3x3.3)

AON7140 FAQ

1.How can I place an order for AON7140 through Aetrix?

Please submit a Request for Quotation (RFQ) for AON7140 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 AON7140 reliable?

The price and inventory of AON7140 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON7140 is usually 5 days.

3.What payment methods are accepted for AON7140?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON7140 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AON7140?

AON7140 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AON7140 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 AON7140?

For technical support, including AON7140 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON7140 requirements.

6.How does Aetrix verify that AON7140 is sourced from the original manufacturer or authorized distributors?

All AON7140 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 AON7140 meets industry standards.

7.What is the process for return or replacement of AON7140?

All AON7140 units undergo pre-shipment inspection (PSI). If there is an issue with AON7140, 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 AON7140 part is unused and in its original packaging.

Return procedure for AON7140:

1.Submit a request within 90 days.

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

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