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

Alpha & Omega Semiconductor Inc. AOD4182

Name: AOD4182
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD4182
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD4182

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

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

Datasheet:: AOD4182.pdf

Description:: MOSFET N-CH 80V 8.5A/53A TO252

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOD4182 from Alpha & Omega Semiconductor is a 40 V, 75 A, 4.2 mΩ N-channel enhancement-mode MOSFET in TO-252 (DPAK) package, optimized for high-efficiency DC-DC power conversion and load switching in industrial and automotive power supplies.

For engineers reviewing the AOD4182 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), avalanche energy rating, and RoHS/halogen-free compliance status.

Technical Context

The AOD4182 employs trench-gate process technology to achieve low on-resistance and fast switching characteristics. It supports logic-level gate drive (V_GS(th) = 2.0–3.5 V) and features 100% UIS-rated avalanche capability with E_AS = 190 mJ at T_J = 25 °C.

Thermal performance is defined by R_θJA = 62 °C/W (standard PCB layout) and R_θJC = 1.2 °C/W, enabling operation up to T_J = 175 °C. The device meets AEC-Q101 stress testing requirements for automotive-grade reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum drain-source blocking voltage for 12 V/24 V system-level power rails
I_D (continuous)	75 A - Sustained current handling at T_C = 25 °C, suitable for high-current synchronous rectification
R_DS(on) @ V_GS = 10 V	4.2 mΩ - Low conduction loss enabling >95% efficiency in 48 V input buck converters
Q_g	42 nC - Gate charge supporting <100 ns turn-on/turn-off times with standard gate drivers
E_AS	190 mJ - Rated single-pulse avalanche energy ensures robustness against inductive switching transients
R_θJA	62 °C/W - Thermal resistance under JEDEC-standard 2-layer PCB layout, defining heatsink requirements

Pinout & Package

Package: TO-252 (DPAK), surface-mount, single-die, thermally enhanced plastic package with exposed drain pad.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control terminal	Receives gate drive signal; threshold voltage 2.0–3.5 V enables direct microcontroller interface
2 (Drain)	Power output node	Connected to high-side or low-side switch node; electrically tied to exposed pad for thermal and electrical conduction
3 (Source)	Reference node	Serves as return path for load current; defines common reference for gate drive and current sensing

Key Features

Feature	Design Value
Halogen-free construction	Meets AOS Green Policy: Br/Cl <900 ppm each, total halogens <1500 ppm - eliminates corrosive decomposition products during reflow/soldering
AEC-Q101 qualified	Passed stress tests including HTGB, HTRB, and temperature cycling - validated for automotive under-hood applications
100% UIS tested	Each unit screened for unclamped inductive switching robustness - guarantees minimum 190 mJ avalanche energy
Low Q_gd/Q_g ratio	0.28 - reduces Miller-induced switching oscillation and improves hard-switching EMI performance

Applications

Automotive Body Control Module (BCM)	Industrial 48 V DC-DC Converter
Use Scenario: High-side load switch for headlight, fog lamp, and HVAC blower control in 12 V/24 V vehicle architectures. IC Role / Device Role / Timing Role: Power switch controlling current flow to resistive/inductive loads with PWM dimming support. Use Value: 4.2 mΩ R_DS(on) minimizes I²R heating during continuous 15–30 A operation; 175 °C T_J rating ensures reliability in sealed enclosures.	Use Scenario: Synchronous rectifier in isolated full-bridge or phase-shifted ZVS converter for telecom/server PSUs. IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacing Schottky diodes to reduce conduction losses. Use Value: 75 A continuous rating and 42 nC Q_g enable efficient operation at 100–300 kHz switching frequencies with minimal gate drive loss.
Server VRM High-Current Phase Leg	EV Onboard Charger (OBC) Input Stage
Use Scenario: High-current power stage in multiphase CPU/GPU voltage regulator modules delivering >200 A per rail. IC Role / Device Role / Timing Role: Bottom-side FET in synchronous buck topology with fast transient response requirements. Use Value: Low R_DS(on) and 1.2 °C/W R_θJC allow direct thermal coupling to PCB copper, reducing need for external heatsinks.	Use Scenario: AC-DC front-end PFC switch in 3.3–6.6 kW bidirectional OBCs operating at 65–100 kHz. IC Role / Device Role / Timing Role: Fast-switching, avalanche-rugged switch in boost-type active PFC circuits. Use Value: 190 mJ E_AS withstands line-voltage surges and inductor current reversal without failure during soft-start or fault conditions.

Automotive Body Control Module (BCM)

Industrial 48 V DC-DC Converter

Use Scenario: High-side load switch for headlight, fog lamp, and HVAC blower control in 12 V/24 V vehicle architectures.

IC Role / Device Role / Timing Role: Power switch controlling current flow to resistive/inductive loads with PWM dimming support.

Use Value: 4.2 mΩ R_DS(on) minimizes I²R heating during continuous 15–30 A operation; 175 °C T_J rating ensures reliability in sealed enclosures.

Use Scenario: Synchronous rectifier in isolated full-bridge or phase-shifted ZVS converter for telecom/server PSUs.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacing Schottky diodes to reduce conduction losses.

Use Value: 75 A continuous rating and 42 nC Q_g enable efficient operation at 100–300 kHz switching frequencies with minimal gate drive loss.

Server VRM High-Current Phase Leg

EV Onboard Charger (OBC) Input Stage

Use Scenario: High-current power stage in multiphase CPU/GPU voltage regulator modules delivering >200 A per rail.

IC Role / Device Role / Timing Role: Bottom-side FET in synchronous buck topology with fast transient response requirements.

Use Value: Low R_DS(on) and 1.2 °C/W R_θJC allow direct thermal coupling to PCB copper, reducing need for external heatsinks.

Use Scenario: AC-DC front-end PFC switch in 3.3–6.6 kW bidirectional OBCs operating at 65–100 kHz.

IC Role / Device Role / Timing Role: Fast-switching, avalanche-rugged switch in boost-type active PFC circuits.

Use Value: 190 mJ E_AS withstands line-voltage surges and inductor current reversal without failure during soft-start or fault conditions.

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 = 48 nC; not AEC-Q101 qualified	Lacks automotive qualification; higher conduction loss increases thermal load in space-constrained designs	Prefer AOD4182 where automotive reliability or lower R_DS(on) is required
STL110N4F7AG	R_DS(on) = 3.8 mΩ @ 10 V; TO-263 package; higher Q_gd/Q_g ratio (0.35)	Requires larger footprint; increased Miller charge may degrade EMI in high-frequency converters	Choose AOD4182 for TO-252 footprint compatibility and superior switching noise control

Compared with IRF7470PBF and STL110N4F7AG, the AOD4182 delivers the lowest thermal resistance in DPAK, combined with AEC-Q101 qualification and halogen-free compliance-making it optimal for automotive and high-reliability industrial power stages where footprint, efficiency, and regulatory alignment are jointly constrained.

Availability

AOD4182 is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC converters, and server VRM power stages requiring stable component supply across multi-year production cycles.

Supply support for AOD4182 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 AOD4182 belongs to AOS's "Advanced Trench" MOSFET product line, engineered specifically for high-current, high-efficiency switching in compact surface-mount power systems.

FAQ

What is the maximum junction temperature rating for the AOD4182?

The AOD4182 has a maximum rated junction temperature of 175 °C. This specification allows sustained operation in high-ambient environments such as automotive engine compartments or enclosed industrial power supplies. Derating curves in the official AOS datasheet define safe operating area limits above 25 °C ambient. The AOD4182 must be mounted on a PCB with adequate copper area to maintain T_J ≤ 175 °C under full load.

Is the AOD4182 RoHS and halogen-free compliant?

Yes, the AOD4182 is fully RoHS compliant and halogen-free per AOS Green Policy: bromine and chlorine content each <900 ppm, total halogens <1500 ppm. It carries no "L" suffix because TO-252 packages were converted to green versions prior to 2010; all currently manufactured AOD4182 units meet this standard without suffix differentiation.

Does the AOD4182 require a gate resistor for reliable switching?

A gate resistor is recommended for the AOD4182 to control dV/dt and suppress ringing, especially in high-speed or high-current applications. Typical values range from 5 Ω to 22 Ω depending on driver strength and layout parasitics. The AOD4182's Q_g of 42 nC and low Q_gd make it responsive to moderate gate drive, but uncontrolled edge rates can cause shoot-through or EMI issues in synchronous topologies.

What is the avalanche energy rating of the AOD4182 and how is it tested?

The AOD4182 is rated for 190 mJ of single-pulse avalanche energy (E_AS) at T_J = 25 °C. This value is measured per JEDEC JESD24-11 using unclamped inductive switching (UIS) test conditions. Every AOD4182 unit undergoes 100% UIS screening, ensuring consistent ruggedness against inductive transients in motor drives and relay snubbing circuits.

Can the AOD4182 be used in parallel configurations?

Yes, the AOD4182 supports paralleling due to its positive temperature coefficient of R_DS(on), which promotes current sharing across multiple devices. Successful implementation requires matched gate drive paths, symmetrical PCB layout, and individual source resistors for dynamic balancing. Thermal coupling between devices must also be minimized to avoid thermal runaway-verified in AOS application note AN-1005 for multi-phase VRMs.

AOD4182 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: SDMOS™

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 80 V

Current - Continuous Drain (Id) @ 25°C:: 8.5A (Ta), 53A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 7V, 10V

Rds On (Max) @ Id, Vgs:: 15.5mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 4.2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 34 nC @ 10 V

Vgs (Max):: ±25V

Input Capacitance (Ciss) (Max) @ Vds:: 2005 pF @ 40 V

FET Feature:: -

Power Dissipation (Max):: 2.5W (Ta), 100W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD4182 FAQ

1.How can I place an order for AOD4182 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD4182 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 AOD4182 reliable?

The price and inventory of AOD4182 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD4182 is usually 5 days.

3.What payment methods are accepted for AOD4182?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD4182 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD4182?

AOD4182 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD4182 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 AOD4182?

For technical support, including AOD4182 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD4182 requirements.

6.How does Aetrix verify that AOD4182 is sourced from the original manufacturer or authorized distributors?

All AOD4182 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 AOD4182 meets industry standards.

7.What is the process for return or replacement of AOD4182?

All AOD4182 units undergo pre-shipment inspection (PSI). If there is an issue with AOD4182, 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 AOD4182 part is unused and in its original packaging.

Return procedure for AOD4182:

1.Submit a request within 90 days.

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

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