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

Alpha & Omega Semiconductor Inc. AOD486A

Name: AOD486A
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD486A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD486A

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

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

Datasheet:: AOD486A.pdf

Description:: MOSFET N-CH 40V 50A TO252

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOD486A from Alpha & Omega Semiconductor is a 40V, 50A N-channel enhancement-mode MOSFET in TO-252 (D-PAK) package, featuring 9.8 mΩ R_DS(ON) at V_GS = 10V and 13 mΩ at 4.5V, 100% UIS tested, and ESD-protected - designed for high-efficiency PWM motor control, DC-DC synchronous rectification, and industrial load switching.

For engineers reviewing the AOD486A datasheet, pinout, applications, or equivalent options, key selection criteria include its 40V V_DS, 50A continuous drain rating at T_C = 100°C, low gate charge (22 nC @ 10V), thermal resistance R_θJC = 3°C/W, and robust avalanche capability (E_AR = 40 mJ).

Technical Context

The AOD486A employs trench-gate MOSFET architecture optimized for low conduction loss and fast switching, with gate threshold voltage of 1.75–3.0 V and transconductance g_FS = 47 S. Its dynamic parameters include t_d(on) = 6.5 ns, t_r = 12.5 ns, t_d(off) = 33 ns, and t_f = 16 ns under standard test conditions (V_GS = 10V, V_DS = 20V, R_GEN = 3 Ω).

Thermally, it supports junction temperatures up to 175°C, with R_θJA = 60°C/W on 1-in² FR-4 board and R_θJC = 3°C/W to heatsink. The device is rated for repetitive avalanche energy of 40 mJ (L = 0.3 mH) and features a body diode with V_SD = 0.76–1.0 V and Q_rr = 33 nC at dI/dt = 100 A/μs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage for 12–24V system-level power stages
I_D (continuous)	50 A at T_C = 100°C - Supports high-current load switching without external heatsink beyond PCB copper
R_DS(ON)	<9.8 mΩ @ V_GS = 10V - Enables <1W conduction loss at 32A, critical for thermal budget in compact designs
Q_g	22 nC @ 10V - Low gate drive power requirement, compatible with standard 3.3V/5V logic-level controllers
E_AR	40 mJ - Withstands unclamped inductive switching events in relay/motor driver applications
R_θJC	3°C/W - Enables direct mounting to heatsink for >60W dissipation in industrial ambient conditions
V_GS(th)	1.75–3.0 V - Ensures reliable turn-on with 3.3V microcontroller GPIO or gate drivers

Pinout & Package

Package: TO-252 (D-PAK), surface-mount, thermally enhanced with exposed drain pad on bottom side.

Pin/Terminal	Circuit Role	Design Meaning
D (Drain)	Main current path from source to load	Connected to exposed metal pad - primary thermal and current path; must be soldered to large copper pour
G (Gate)	Control terminal for channel conduction	High-impedance input requiring low-noise routing; gate resistor recommended for ringing suppression
S (Source)	Reference node for gate drive and current return	Common reference for driver IC and sense resistor; ties to ground plane for stable switching

Key Features

Feature	Design Value
Advanced trench technology	Enables 9.8 mΩ R_DS(ON) at 10V while maintaining ruggedness against dv/dt-induced false turn-on
100% UIS tested	Guarantees survival under worst-case unclamped inductive switching without derating
ESD protection	HBM rating ≥2 kV - eliminates need for external ESD clamps in board-level handling
Low Q_gd/Q_g ratio	4.8 nC / 22 nC = 0.22 - improves Miller immunity and reduces switching loss during hard commutation
Body diode recovery	Q_rr = 33 nC, t_rr = 31 ns - enables efficient synchronous rectification in buck converters up to 500 kHz

Applications

Motor Drive Stage	DC-DC Synchronous Rectifier
Use Scenario: H-bridge half-bridge leg in 24V BLDC motor controller for HVAC blowers. IC Role / Device Role / Timing Role: High-side/low-side switching element with 50A peak current capability and fast turn-off (t_f = 16 ns) to minimize shoot-through risk. Use Value: 9.8 mΩ R_DS(ON) reduces I²R losses by 35% vs. legacy 15 mΩ MOSFETs, enabling 95% efficiency at 30A load.	Use Scenario: Secondary-side switch in 48V-to-12V isolated buck converter for telecom power supply. IC Role / Device Role / Timing Role: Synchronous rectifier replacing Schottky diode, driven by transformer-coupled gate signal with precise timing alignment. Use Value: Body diode Q_rr = 33 nC and low V_SD = 0.76 V enable zero-voltage switching and reduce reverse recovery loss by 60%.
Industrial Load Switch	Automotive Accessory Power
Use Scenario: Solid-state replacement for mechanical relay in PLC output module controlling solenoid valves. IC Role / Device Role / Timing Role: Single-pole, high-current switch with integrated avalanche energy rating (E_AR = 40 mJ) for inductive kickback absorption. Use Value: Eliminates snubber circuitry and extends lifetime beyond 1M cycles due to 100% UIS qualification.	Use Scenario: Power distribution switch for 12V accessory circuits (e.g., infotainment USB hub) in automotive body control module. IC Role / Device Role / Timing Role: Load switch with logic-level gate drive (V_GS(th) ≤ 3.0 V) and built-in ESD protection for CAN/LIN bus proximity. Use Value: 3.3V MCU-compatible turn-on and HBM ≥2 kV withstand eliminate external TVS, reducing BOM count by one component.

Motor Drive Stage

DC-DC Synchronous Rectifier

Use Scenario: H-bridge half-bridge leg in 24V BLDC motor controller for HVAC blowers.

IC Role / Device Role / Timing Role: High-side/low-side switching element with 50A peak current capability and fast turn-off (t_f = 16 ns) to minimize shoot-through risk.

Use Value: 9.8 mΩ R_DS(ON) reduces I²R losses by 35% vs. legacy 15 mΩ MOSFETs, enabling 95% efficiency at 30A load.

Use Scenario: Secondary-side switch in 48V-to-12V isolated buck converter for telecom power supply.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing Schottky diode, driven by transformer-coupled gate signal with precise timing alignment.

Use Value: Body diode Q_rr = 33 nC and low V_SD = 0.76 V enable zero-voltage switching and reduce reverse recovery loss by 60%.

Industrial Load Switch

Automotive Accessory Power

Use Scenario: Solid-state replacement for mechanical relay in PLC output module controlling solenoid valves.

IC Role / Device Role / Timing Role: Single-pole, high-current switch with integrated avalanche energy rating (E_AR = 40 mJ) for inductive kickback absorption.

Use Value: Eliminates snubber circuitry and extends lifetime beyond 1M cycles due to 100% UIS qualification.

Use Scenario: Power distribution switch for 12V accessory circuits (e.g., infotainment USB hub) in automotive body control module.

IC Role / Device Role / Timing Role: Load switch with logic-level gate drive (V_GS(th) ≤ 3.0 V) and built-in ESD protection for CAN/LIN bus proximity.

Use Value: 3.3V MCU-compatible turn-on and HBM ≥2 kV withstand eliminate external TVS, reducing BOM count by one component.

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) = 11.5 mΩ @ 10V; Q_g = 25 nC; TO-252 package; no UIS testing specified	Lower avalanche ruggedness; requires external snubber in inductive loads	Prefer AOD486A where unclamped switching or high-reliability industrial use is required
DMN4050LSD-13	R_DS(ON) = 10.5 mΩ @ 10V; Q_g = 20 nC; SO-8 package; lower current rating (30A)	SO-8 limits thermal performance; unsuitable for >35A continuous operation	Choose AOD486A when PCB space allows TO-252 and >40A current capability is needed

Compared with IRF7470PBF and DMN4050LSD-13, the AOD486A delivers superior thermal performance (R_θJC = 3°C/W), guaranteed UIS robustness, and higher continuous current (50A), making it optimal for high-power density industrial and automotive power stages where reliability under transient stress is critical.

Availability

AOD486A is available at Aetrix Electronics and suitable for motor drives, DC-DC converters, and industrial load switching requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AOD486A 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 modules for computing, consumer, industrial, and automotive markets.

The AOD486A belongs to AOS's advanced trench MOSFET product line, engineered for high-current, high-efficiency power conversion in space-constrained applications where low R_DS(ON), fast switching, and ruggedness are essential.

FAQ

What is the maximum continuous drain current rating for the AOD486A?

The AOD486A has a maximum continuous drain current of 50 A at case temperature T_C = 100°C, and 36 A at T_C = 125°C. This rating assumes proper PCB copper area for heat dissipation and is limited by the TO-252 package's thermal resistance (R_θJC = 3°C/W). At ambient temperature (T_A = 25°C) with standard layout, the practical limit is ~25 A due to R_θJA = 60°C/W.

Does the AOD486A support logic-level gate drive?

Yes, the AOD486A supports logic-level gate drive with a gate threshold voltage V_GS(th) of 1.75–3.0 V and guaranteed R_DS(ON) < 13 mΩ at V_GS = 4.5 V. This enables direct drive from 3.3V or 5V microcontrollers without level-shifting, though a gate resistor (e.g., 10–22 Ω) is recommended to control dv/dt and suppress ringing.

Is the AOD486A qualified for automotive applications?

The AOD486A is not AEC-Q101 qualified. It is rated for industrial temperature range (–55°C to +175°C) and RoHS-compliant, but lacks automotive-specific stress testing, PPAP documentation, or failure rate reporting. For automotive accessory power applications, system-level validation is required; AOS offers AEC-Q101 variants like AOD486E for qualified use cases.

What is the significance of 100% UIS testing for the AOD486A?

100% UIS (Unclamped Inductive Switching) testing ensures every AOD486A unit is verified to survive single-pulse inductive energy events up to E_AR = 40 mJ (L = 0.3 mH). This guarantees robustness in motor drive, relay, and solenoid applications where voltage spikes exceed V_DS rating, eliminating field failures due to avalanche overstress without requiring external clamping components.

Can the AOD486A be used in synchronous rectification topologies?

Yes, the AOD486A is well-suited for synchronous rectification due to its low R_DS(ON) (<9.8 mΩ), fast body diode recovery (t_rr = 31 ns, Q_rr = 33 nC), and low Q_gd/Q_g ratio (0.22). These characteristics reduce reverse recovery loss and improve light-load efficiency in buck, flyback, and LLC converters operating up to 500 kHz - confirmed by AOS application note AN-8027.

AOD486A 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:: 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:: 9.8mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 22 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1920 pF @ 20 V

FET Feature:: -

Power Dissipation (Max):: 2W (Ta), 50W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD486A FAQ

1.How can I place an order for AOD486A through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD486A 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 AOD486A reliable?

The price and inventory of AOD486A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD486A is usually 5 days.

3.What payment methods are accepted for AOD486A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD486A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD486A?

AOD486A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD486A 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 AOD486A?

For technical support, including AOD486A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD486A requirements.

6.How does Aetrix verify that AOD486A is sourced from the original manufacturer or authorized distributors?

All AOD486A 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 AOD486A meets industry standards.

7.What is the process for return or replacement of AOD486A?

All AOD486A units undergo pre-shipment inspection (PSI). If there is an issue with AOD486A, 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 AOD486A part is unused and in its original packaging.

Return procedure for AOD486A:

1.Submit a request within 90 days.

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

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