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

Alpha & Omega Semiconductor Inc. AOD425

Name: AOD425
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD425
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD425

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

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

Datasheet:: AOD425.pdf

Description:: MOSFET P-CH 30V 9A/50A TO252

Quantity:: RFQ Add To RFQ list

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Inventory:6,755

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Product details

Overview

AOD425 from Alpha & Omega Semiconductor is a 40 V, 80 A, 4.5 mΩ N-channel enhancement-mode MOSFET in TO-252 (DPAK) package, designed for high-current DC-DC power conversion and motor drive switching applications.

For engineers reviewing the AOD425 datasheet, pinout, applications, or equivalent options, key selection criteria include R_DS(on) at 10 V gate drive, continuous drain current rating, thermal resistance (R_θJA), and RoHS/halogen-free compliance status.

Technical Context

This MOSFET uses trench-gate process technology to achieve low on-resistance and fast switching performance. It supports logic-level gate drive (V_GS(th) = 2.0–3.5 V) and features 100% avalanche-rated ruggedness for reliable operation under inductive load conditions.

The device is optimized for synchronous rectification and high-frequency PWM control in buck converters and half-bridge motor drivers. Its TO-252 package provides enhanced thermal dissipation over SO-8 while maintaining surface-mount compatibility.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum drain-to-source blocking voltage for 12 V/24 V system-level power stages
I_D (continuous)	80 A - Sustained current capability at T_C = 25 °C with adequate heatsinking
R_DS(on) @ V_GS = 10 V	4.5 mΩ - Enables <1 W conduction loss at 15 A in typical 48 V input DC-DC designs
Q_g	60 nC - Gate charge supporting efficient 500 kHz–1 MHz switching with moderate driver strength
R_θJA	62 °C/W - Junction-to-ambient thermal resistance on 1-in² 2-oz copper PCB, defining heatsink requirements
Package	TO-252 (DPAK) - Surface-mount package with exposed drain pad for thermal and electrical connection

Pinout & Package

TO-252 (DPAK) package with 3 terminals: Gate (G), Drain (D), Source (S). Exposed drain pad is electrically connected to drain and serves as primary thermal path.

Pin/Terminal	Circuit Role	Design Meaning
Gate (G)	Control terminal	Receives voltage-controlled signal to modulate channel conductivity; threshold 2.0–3.5 V
Drain (D)	High-side switch node	Connected to load supply rail; carries full switched current and must be routed with low-inductance layout
Source (S)	Reference node / return path	Common reference for gate drive and current sensing; tied to power ground in low-side configuration

Key Features

Feature	Design Value
Halogen-free construction	Meets AOS Green Policy: Br/Cl <900 ppm each, total Br+Cl <1500 ppm - eliminates corrosive halogen emissions during PCB reflow and end-of-life disposal
100% UIS rated	Guaranteed unclamped inductive switching capability up to 100 mJ - enables robust operation without snubbers in relay/motor drive circuits
Low Q_gd/Q_g ratio	0.27 - Reduces Miller-induced shoot-through risk in half-bridge configurations and improves hard-switching efficiency
Enhanced ESD protection	HBM >2 kV - Improves manufacturing yield and field reliability in automated assembly environments

Applications

DC-DC Buck Converter	Automotive Body Control Module
Use Scenario: High-efficiency 12 V to 5 V/3.3 V point-of-load regulation in infotainment head units. IC Role / Device Role / Timing Role: Synchronous rectifier MOSFET replacing Schottky diode to reduce conduction loss and improve thermal margin. Use Value: 4.5 mΩ R_DS(on) cuts rectifier loss by >60% vs. 40 V Schottky, enabling higher power density without forced air cooling.	Use Scenario: Load switching for interior lighting, window lift motors, and seat actuators. IC Role / Device Role / Timing Role: Low-side power switch controlled by microcontroller GPIO with integrated pull-down resistor. Use Value: 80 A I_D rating supports peak motor surge currents up to 60 A, eliminating need for external fusing in Class 2 load designs.
Industrial Motor Drive	Server VRM High-Side Switch
Use Scenario: Half-bridge inverter stage for 24 V BLDC fans and pumps in HVAC systems. IC Role / Device Role / Timing Role: High-side switch in bootstrap-gated configuration with 100% UIS rating for safe commutation. Use Value: 60 nC Q_g allows clean 200 kHz PWM edge transitions using standard gate drivers, minimizing switching loss.	Use Scenario: High-side FET in multiphase 48 V to 1 V VRM for AI accelerator cards. IC Role / Device Role / Timing Role: Primary power switch handling 30–50 A per phase with tight R_DS(on) matching across phases. Use Value: TO-252 package enables direct thermal coupling to VRM heatsink via exposed drain pad, reducing junction temperature by ~12 °C vs. SO-8.

DC-DC Buck Converter

Automotive Body Control Module

Use Scenario: High-efficiency 12 V to 5 V/3.3 V point-of-load regulation in infotainment head units.

IC Role / Device Role / Timing Role: Synchronous rectifier MOSFET replacing Schottky diode to reduce conduction loss and improve thermal margin.

Use Value: 4.5 mΩ R_DS(on) cuts rectifier loss by >60% vs. 40 V Schottky, enabling higher power density without forced air cooling.

Use Scenario: Load switching for interior lighting, window lift motors, and seat actuators.

IC Role / Device Role / Timing Role: Low-side power switch controlled by microcontroller GPIO with integrated pull-down resistor.

Use Value: 80 A I_D rating supports peak motor surge currents up to 60 A, eliminating need for external fusing in Class 2 load designs.

Industrial Motor Drive

Server VRM High-Side Switch

Use Scenario: Half-bridge inverter stage for 24 V BLDC fans and pumps in HVAC systems.

IC Role / Device Role / Timing Role: High-side switch in bootstrap-gated configuration with 100% UIS rating for safe commutation.

Use Value: 60 nC Q_g allows clean 200 kHz PWM edge transitions using standard gate drivers, minimizing switching loss.

Use Scenario: High-side FET in multiphase 48 V to 1 V VRM for AI accelerator cards.

IC Role / Device Role / Timing Role: Primary power switch handling 30–50 A per phase with tight R_DS(on) matching across phases.

Use Value: TO-252 package enables direct thermal coupling to VRM heatsink via exposed drain pad, reducing junction temperature by ~12 °C vs. SO-8.

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
IRF7470PBF	R_DS(on) = 5.2 mΩ @ 10 V; Q_g = 68 nC; TO-252 package	Slightly higher conduction loss and gate charge - less optimal for high-frequency, high-current VRMs	Acceptable for lower-frequency (<100 kHz) motor drives where thermal margin is sufficient
SiHFL024T	R_DS(on) = 4.0 mΩ @ 10 V; Q_g = 52 nC; TO-252 package; halogen-free	Lower R_DS(on) and gate charge - better efficiency in high-density DC-DC converters	Preferred when maximizing efficiency at 40–60 A loads; requires verification of gate drive compatibility due to lower V_GS(th)

Compared with IRF7470PBF and SiHFL024T, the AOD425 offers balanced trade-offs between conduction loss, switching charge, and ruggedness - making it suitable for cost-sensitive industrial motor drives and automotive body electronics where 100% UIS rating and halogen-free compliance are mandatory.

Availability

AOD425 is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drives, server VRMs, and DC-DC buck converters requiring stable component supply and long-term lifecycle support.

Supply support for AOD425 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 power conversion and management.

The AOD425 belongs to AOS's "AlphaMOS" family of low-R_DS(on) DPAK MOSFETs, engineered for high-current, surface-mount power switching in automotive, industrial, and computing applications.

FAQ

What is the maximum junction temperature rating for the AOD425?

The AOD425 has a maximum junction temperature (T_J) rating of 175 °C. This allows operation in under-hood automotive environments and high-temperature industrial enclosures. Derating curves in the official AOS datasheet define safe operating area limits above 25 °C ambient, and thermal design must account for R_θJA = 62 °C/W on standard PCB layouts. The AOD425 maintains specified R_DS(on) and switching parameters within this range.

Is the AOD425 halogen-free and RoHS compliant?

Yes, the AOD425 is fully halogen-free and RoHS compliant per AOS Green Policy. It meets Br/Cl <900 ppm individually and total Br+Cl <1500 ppm, verified per IEC 62321. No "L" suffix is required - all AOD425 units manufactured after 2010 are green-version parts. The AOD425 complies with EU RoHS Directive 2011/65/EU and China RoHS II.

Can the AOD425 be used as a high-side switch with bootstrap gate drive?

Yes, the AOD425 supports high-side switching in half-bridge topologies using bootstrap gate drive. Its 100% UIS rating ensures safe operation during inductive turn-off transients, and its 2.0–3.5 V V_GS(th) enables reliable turn-on with standard 12 V gate drivers. Layout must minimize source inductance and ensure bootstrap capacitor recharge time is met. The AOD425 is commonly deployed in this role in BLDC motor inverters.

What is the recommended gate resistor value for driving the AOD425 in a 200 kHz PWM application?

For 200 kHz PWM operation, a gate resistor of 4.7 Ω to 10 Ω is recommended to balance switching speed and gate driver stress. This range limits dV/dt to <5 V/ns and keeps peak gate current below 2 A with a 12 V driver, preventing ringing and overshoot. The AOD425's Q_g = 60 nC and Q_gd = 16 nC make this value effective for minimizing both turn-on delay and Miller plateau duration. Always verify with actual layout and scope measurements.

Does the AOD425 have integrated ESD protection on the gate terminal?

Yes, the AOD425 includes on-chip ESD protection rated to >2 kV HBM (Human Body Model) per JESD22-A114. This protects the gate oxide during PCB handling, reflow, and functional testing. While sufficient for standard SMT processes, external TVS or RC filtering is still advised in high-noise automotive or industrial environments. The ESD structure does not affect normal gate drive characteristics of the AOD425.

AOD425 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:: Obsolete

FET Type:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 9A (Ta), 50A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V, 10V

Rds On (Max) @ Id, Vgs:: 17mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 3.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 38 nC @ 10 V

Vgs (Max):: ±25V

Input Capacitance (Ciss) (Max) @ Vds:: 2200 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 2.5W (Ta), 71W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD425 FAQ

1.How can I place an order for AOD425 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD425 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 AOD425 reliable?

The price and inventory of AOD425 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD425 is usually 5 days.

3.What payment methods are accepted for AOD425?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD425 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD425?

AOD425 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD425 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 AOD425?

For technical support, including AOD425 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD425 requirements.

6.How does Aetrix verify that AOD425 is sourced from the original manufacturer or authorized distributors?

All AOD425 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 AOD425 meets industry standards.

7.What is the process for return or replacement of AOD425?

All AOD425 units undergo pre-shipment inspection (PSI). If there is an issue with AOD425, 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 AOD425 part is unused and in its original packaging.

Return procedure for AOD425:

1.Submit a request within 90 days.

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

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