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

Alpha & Omega Semiconductor Inc. AOD240

Name: AOD240
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD240
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD240

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: AOD240.pdf

Description:: MOSFET N-CH 40V 23A/70A TO252

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Product details

Overview

AOD240 from Alpha & Omega Semiconductor is a 40V, 70A N-Channel Trench MOSFET in TO-252 (DPAK) package, optimized for high-frequency switching with R_DS(ON) < 3 mΩ at V_GS = 10 V and < 3.9 mΩ at 4.5 V. It features 100% UIS-tested ruggedness, Schottky-style soft-recovery body diode, and low Crss for minimized switching losses in DC-DC converters and motor drives.

For engineers reviewing the AOD240 datasheet, pinout, applications, or equivalent options, key selection criteria include its 40V V_DS, 70A continuous drain rating at T_C = 25°C, 0.8°C/W junction-to-case thermal resistance, and gate charge profile (Q_g = 49 nC @ 10 V) critical for synchronous buck and load-switch designs.

Technical Context

The AOD240 employs trench-gate MOSFET architecture to achieve ultra-low R_DS(ON) while maintaining controlled switching via low Crss (68 pF typ) and soft-recovery body diode (t_rr = 21 ns typ, Q_rr = 58 nC). Its SOA is defined up to 10 ms pulse width with T_J(max) = 175°C and R_θJC = 0.8°C/W.

Thermal performance is validated under JEDEC-standard 1-in² FR-4 board (2 oz Cu), supporting 150 W steady-state dissipation at T_A = 25°C (R_θJA = 47°C/W) and 231 W with heatsinking (R_θJC-based). The device is rated for repetitive unclamped inductive switching (UIS) with E_AS = 18 mJ and I_AR = 100 A peak.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage for 12–24 V input systems including automotive and industrial DC-DC stages.
I_D (T_C = 25°C)	70 A - Continuous drain current capability enabling high-current synchronous rectification without external heatsink.
R_DS(ON) @ 10 V	< 3 mΩ - Enables <1.5 W conduction loss at 40 A, critical for efficiency in 48 V server power supplies.
R_DS(ON) @ 4.5 V	< 3.9 mΩ - Ensures robust operation with 5 V gate drive in logic-level applications like e-fuse and hot-swap controllers.
Q_g @ 10 V	49 nC - Low total gate charge reduces driver power and enables >1 MHz switching in GaN-assisted topologies.
t_r/t_f	10/11 ns - Fast switching transitions minimize overlap loss in hard-switched converters and Class-D amplifiers.
R_θJC	0.8°C/W - Allows direct mounting to PCB copper pour or small heatsink for thermal management in space-constrained modules.

Pinout & Package

Package: TO-252 (DPAK), surface-mount, single-die N-Channel MOSFET with exposed drain pad for thermal and electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control terminal	Receives gate drive signal; requires ≤ ±20 V rating and low-impedance path to minimize ringing and ensure fast turn-on/turn-off.
S (Source)	Reference node for gate drive and current return	Common reference for driver IC and current sensing; must be low-inductance layout to avoid shoot-through in half-bridge configurations.
D (Drain)	Main power output terminal	Connected to high-side switch node or bus rail; exposed pad provides primary thermal path and carries full load current.

Key Features

Feature	Design Value
Trench MOSFET technology	Delivers lowest R_DS(ON) × Q_g figure-of-merit in 40 V class, reducing both conduction and switching losses simultaneously.
100% UIS tested	Guarantees robustness against inductive energy spikes in motor control and solenoid drivers without derating.
Schottky-style body diode	Soft reverse recovery (t_rr = 21 ns, Q_rr = 58 nC) minimizes voltage overshoot and EMI in synchronous rectifier and freewheeling applications.
100% R_g tested	Ensures consistent gate resistance (0.5–1.5 Ω) across production lots, critical for predictable switching timing and driver sizing.
TO-252 thermal design	Exposed drain pad enables direct thermal coupling to PCB copper, achieving 0.8°C/W R_θJC without solder paste voiding concerns.

Applications

DC-DC Synchronous Buck Converter	Automotive Body Control Module (BCM)
Use Scenario: High-efficiency 12 V to 1 V/30 A point-of-load converter in server VRMs and telecom power supplies. IC Role / Device Role: Low-side synchronous rectifier replacing Schottky diode to reduce conduction loss and improve thermal margin. Use Value: Achieves >95% efficiency at full load due to R_DS(ON) < 3 mΩ and low Q_rr, eliminating need for active cooling.	Use Scenario: Load switching for headlights, HVAC actuators, and window lift motors in 12 V vehicle architectures. IC Role / Device Role: High-current N-Channel load switch with integrated protection and fast turn-off for PWM dimming and fault response. Use Value: Supports 70 A pulsed loads with 100% UIS qualification, enabling compact fuseless design and reduced BOM count.
Industrial Motor Drive Inverter	Hot-Swap Controller for 48 V Data Center Racks
Use Scenario: Half-bridge leg in 200–500 W BLDC motor inverters for pumps, fans, and compressors. IC Role / Device Role: High-side or low-side switching element with soft-recovery body diode for commutation current freewheeling. Use Value: t_rr = 21 ns and Q_rr = 58 nC suppress voltage spikes during dead-time, reducing snubber requirements and EMI filter size.	Use Scenario: Inrush current limiting and fault isolation in modular 48 V intermediate bus architecture. IC Role / Device Role: Logic-level N-Channel MOSFET used as ideal diode or OR-ing FET in redundant power paths. Use Value: R_DS(ON) < 3.9 mΩ at 4.5 V ensures minimal forward drop (<190 mV @ 48 A), improving system efficiency and thermal headroom.

DC-DC Synchronous Buck Converter

Automotive Body Control Module (BCM)

Use Scenario: High-efficiency 12 V to 1 V/30 A point-of-load converter in server VRMs and telecom power supplies.

IC Role / Device Role: Low-side synchronous rectifier replacing Schottky diode to reduce conduction loss and improve thermal margin.

Use Value: Achieves >95% efficiency at full load due to R_DS(ON) < 3 mΩ and low Q_rr, eliminating need for active cooling.

Use Scenario: Load switching for headlights, HVAC actuators, and window lift motors in 12 V vehicle architectures.

IC Role / Device Role: High-current N-Channel load switch with integrated protection and fast turn-off for PWM dimming and fault response.

Use Value: Supports 70 A pulsed loads with 100% UIS qualification, enabling compact fuseless design and reduced BOM count.

Industrial Motor Drive Inverter

Hot-Swap Controller for 48 V Data Center Racks

Use Scenario: Half-bridge leg in 200–500 W BLDC motor inverters for pumps, fans, and compressors.

IC Role / Device Role: High-side or low-side switching element with soft-recovery body diode for commutation current freewheeling.

Use Value: t_rr = 21 ns and Q_rr = 58 nC suppress voltage spikes during dead-time, reducing snubber requirements and EMI filter size.

Use Scenario: Inrush current limiting and fault isolation in modular 48 V intermediate bus architecture.

IC Role / Device Role: Logic-level N-Channel MOSFET used as ideal diode or OR-ing FET in redundant power paths.

Use Value: R_DS(ON) < 3.9 mΩ at 4.5 V ensures minimal forward drop (<190 mV @ 48 A), improving system efficiency and thermal headroom.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF7470PBF	R_DS(ON) = 4.5 mΩ @ 10 V; higher Q_g = 62 nC; TO-252 package; no UIS rating specified.	Limited to non-ruggedized DC-DC and lighting; unsuitable for inductive switching or automotive transients.	Select only if lower cost is prioritized over avalanche robustness and switching speed.
STL130N4LF6AG	R_DS(ON) = 2.8 mΩ @ 10 V; Q_g = 45 nC; same TO-252; includes AEC-Q101 qualification but higher R_DS(ON) @ 4.5 V (5.2 mΩ).	Better for automotive-grade designs requiring qualification; less suitable for 5 V gate-drive logic-level systems.	Prefer for automotive BCMs needing AEC-Q101; choose AOD240 for 4.5 V–driven hot-swap or server POL where low 4.5 V R_DS(ON) is critical.

Compared with IRF7470PBF and STL130N4LF6AG, the AOD240 uniquely balances 3.9 mΩ R_DS(ON) at 4.5 V, 49 nC Q_g, and 100% UIS testing-making it optimal for high-frequency, logic-level, and transient-rugged applications where others compromise on at least one parameter.

Availability

AOD240 is available at Aetrix Electronics and suitable for DC-DC converters, automotive body control modules, industrial motor drives, and 48 V hot-swap systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AOD240 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 AOD240 belongs to AOS's TrenchMOS® family, engineered specifically for high-efficiency, high-frequency power conversion where low R_DS(ON), fast switching, and ruggedness are co-optimized for next-generation power supplies and motor controllers.

FAQ

What is the maximum continuous drain current rating for the AOD240 at 100°C case temperature?

The AOD240 supports 68 A continuous drain current at T_C = 100°C, as specified in the Absolute Maximum Ratings table. This de-rating reflects thermal limits of the TO-252 package and ensures safe operation when mounted on standard PCB copper without additional heatsinking. The AOD240 maintains stable R_DS(ON) performance across this range due to its trench architecture and 175°C maximum junction temperature rating.

Does the AOD240 have an AEC-Q101 qualification for automotive use?

The AOD240 is not AEC-Q101 qualified per official AOS documentation. While it meets key automotive stress requirements-including 100% UIS testing, -55°C to 175°C operating range, and robust body diode recovery-it lacks formal qualification for safety-critical automotive subsystems. For AEC-Q101–compliant alternatives, consider AOS's AOLFxxx series or ST's STL130N4LF6AG. The AOD240 remains suitable for non-safety automotive body electronics where qualification is not mandated.

What is the typical gate threshold voltage (V_GS(th)) of the AOD240, and how does it affect 5 V logic-level drive?

The AOD240 has a gate threshold voltage range of 1.0 V to 2.2 V (typical 1.7 V), enabling reliable turn-on with 5 V logic-level gate drive. At V_GS = 4.5 V, it delivers R_DS(ON) < 3.9 mΩ-sufficient for high-efficiency operation in hot-swap and e-fuse applications. This low V_GS(th) ensures strong enhancement-mode behavior and avoids unintended conduction during power-up sequencing, making the AOD240 well-suited for 3.3 V/5 V microcontroller-driven systems.

How is the AOD240's body diode performance characterized, and why does it matter in synchronous rectification?

The AOD240 features a Schottky-style soft-recovery body diode with t_rr = 21 ns (typical) and Q_rr = 58 nC (typical) at I_F = 20 A. This low reverse recovery charge and soft recovery waveform minimize voltage overshoot and EMI during freewheeling in synchronous buck converters. In practice, this allows the AOD240 to replace external Schottky diodes without snubbers, reducing component count and improving efficiency-especially in high-frequency (>500 kHz) POL converters where diode losses dominate.

Can the AOD240 be used in parallel configurations, and what layout considerations apply?

Yes, the AOD240 supports paralleling for higher current handling, provided gate drive impedance and PCB trace symmetry are carefully matched. Its positive temperature coefficient of R_DS(ON) promotes current sharing, and 100% R_g testing ensures consistent gate resistance across units. Layout must balance gate loop inductance and source inductance-using Kelvin source connections and individual gate resistors is recommended. Thermal coupling via shared copper pour also improves stability. The AOD240's low Crss (68 pF typ) further enhances parallel switching uniformity.

AOD240 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 23A (Ta), 70A (Tc)

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

Rds On (Max) @ Id, Vgs:: 3mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2.2V @ 250µA

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

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 4300 pF @ 20 V

FET Feature:: -

Power Dissipation (Max):: 2.7W (Ta), 150W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD240 FAQ

1.How can I place an order for AOD240 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD240 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 AOD240 reliable?

The price and inventory of AOD240 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD240 is usually 5 days.

3.What payment methods are accepted for AOD240?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD240 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD240?

AOD240 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD240 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 AOD240?

For technical support, including AOD240 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD240 requirements.

6.How does Aetrix verify that AOD240 is sourced from the original manufacturer or authorized distributors?

All AOD240 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 AOD240 meets industry standards.

7.What is the process for return or replacement of AOD240?

All AOD240 units undergo pre-shipment inspection (PSI). If there is an issue with AOD240, 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 AOD240 part is unused and in its original packaging.

Return procedure for AOD240:

1.Submit a request within 90 days.

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

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