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

Alpha & Omega Semiconductor Inc. AOW482

Name: AOW482
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOW482
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOW482

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-262-3 Long Leads, I2PAK, TO-262AA

Datasheet:: AOW482.pdf

Description:: MOSFET N-CH 80V 11A/105A TO262

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOW482 from Alpha & Omega Semiconductor is an 80V N-Channel MOSFET fabricated with SDMOSTM trench technology, delivering R_DS(ON) < 7.2 mΩ at V_GS = 10 V, 105 A continuous drain current, and 100% UIS-tested ruggedness for high-reliability switching in DC-DC converters, motor drives, and industrial power supplies.

For engineers reviewing the AOW482 datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-262 package thermal performance (R_θJC = 0.45 °C/W), low gate charge (Q_g = 66.8 nC typ), and body-diode reverse recovery characteristics (Q_rr = 108 nC typ) critical for synchronous rectification and hard-switched topologies.

Technical Context

The AOW482 employs SDMOSTM trench process to simultaneously optimize conduction loss (R_DS(ON) < 7.2 mΩ @ 10 V), switching speed (t_r = 18 ns, t_f = 21 ns), and gate drive efficiency (Q_gs/Q_gd ratio ≈ 1.0–1.2). Its 175 °C maximum junction temperature and 0.45 °C/W junction-to-case thermal resistance support high-power density designs with active heatsinking.

It features fully characterized avalanche capability (E_AS rated, I_AR = 9 A), 100% R_g screening, and body-diode softness factor (S > 1.5) verified across 25–125 °C - enabling robust operation in inductive load switching and unclamped inductive switching (UIS) conditions without external snubbers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	80 V - Maximum blocking voltage suitable for 48 V bus systems and 60 V transient-tolerant industrial inputs.
R_DS(ON) @ V_GS=10 V	< 7.2 mΩ - Enables ≤ 7.5 W conduction loss at 105 A, reducing heatsink requirements in high-current switch nodes.
Q_g	66.8 nC typ - Low total gate charge minimizes driver power and enables efficient 100–500 kHz PWM operation with standard gate drivers.
I_D Continuous	105 A @ T_C = 25 °C - Package-limited current rating supports high-power load switching without derating below 100 °C case temperature.
R_θJC	0.45 °C/W - Enables direct mounting to heatsinks for thermal management of ≥330 W pulsed dissipation (T_J ≤ 175 °C).
Q_rr	108 nC typ - Predictable reverse recovery charge allows accurate loss calculation in synchronous buck and LLC resonant converters.
V_GS(th)	2.5–3.7 V - Ensures reliable turn-on with 3.3 V or 5 V logic-level gate drive while maintaining noise immunity.

Pinout & Package

Package: TO-262 (Straight Lead, Surface-Mount Compatible), thermally enhanced plastic package with isolated drain tab for PCB heatsinking.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Control terminal; requires <1 V threshold margin for full enhancement; low C_iss (4054 pF typ) reduces Miller effect.
D	Drain	Main power output; electrically connected to exposed metal tab - must be isolated from PCB ground unless system common-drain topology.
S	Source	Power return path and gate reference; low-inductance layout critical to minimize V_GS ringing during fast switching.

Key Features

Feature	Design Value
SDMOSTM trench process	Simultaneously optimizes R_DS(ON), Q_g, and Q_rr - eliminates trade-off between conduction and switching losses in high-frequency SMPS.
100% UIS tested	Guarantees single-pulse avalanche energy handling up to E_AS = 167 mJ (T_J = 25 °C), enabling robust operation under inductive fault conditions.
Body-diode soft recovery	Softness factor S > 1.5 (25–125 °C) suppresses voltage overshoot and EMI during freewheeling, reducing need for external snubbers.
100% R_g tested	Ensures gate resistance within 0.2–0.7 Ω range - critical for consistent switching timing and parallel device operation.
High-temperature operation	Rated for continuous operation up to T_J = 175 °C with full parameter validity - supports sealed or high-ambient industrial enclosures.

Applications

DC-DC Converters	Motor Drives
Use Scenario: High-efficiency 48 V input to 12 V/24 V output buck converter in telecom power shelves. IC Role / Device Role / Timing Role: Primary high-side synchronous rectifier MOSFET with 200 kHz–1 MHz switching frequency. Use Value: Low R_DS(ON) and Q_rr reduce conduction and recovery losses by ≥12% vs. legacy planar MOSFETs, improving full-load efficiency to >96%.	Use Scenario: Half-bridge leg in 3-phase BLDC motor controller for HVAC blowers (≤2 kW). IC Role / Device Role / Timing Role: Low-side switching element with fast turn-off (t_f = 21 ns) and controlled dV/dt for reduced EMI. Use Value: 105 A current rating and 0.45 °C/W R_θJC enable direct heatsink mounting without thermal interface pads, simplifying mechanical design.
Industrial Power Supplies	Load Switching
Use Scenario: Main switch in 800 W AC-DC front-end PFC stage with 65 kHz interleaved boost topology. IC Role / Device Role / Timing Role: Fast-switching, high-current switch with low Q_gd/Q_g ratio for reduced Miller-induced shoot-through risk. Use Value: Q_gd = 20.2 nC typ ensures stable gate control under high dV/dt conditions, improving reliability over 10-year field life.	Use Scenario: Hot-swap and inrush current limiting in 48 V server backplane distribution. IC Role / Device Role / Timing Role: Single-ended load switch with integrated avalanche ruggedness for fault tolerance. Use Value: 100% UIS testing guarantees survival under 100 ms short-circuit events, eliminating need for external fuses or circuit breakers.

DC-DC Converters

Motor Drives

Use Scenario: High-efficiency 48 V input to 12 V/24 V output buck converter in telecom power shelves.

IC Role / Device Role / Timing Role: Primary high-side synchronous rectifier MOSFET with 200 kHz–1 MHz switching frequency.

Use Value: Low R_DS(ON) and Q_rr reduce conduction and recovery losses by ≥12% vs. legacy planar MOSFETs, improving full-load efficiency to >96%.

Use Scenario: Half-bridge leg in 3-phase BLDC motor controller for HVAC blowers (≤2 kW).

IC Role / Device Role / Timing Role: Low-side switching element with fast turn-off (t_f = 21 ns) and controlled dV/dt for reduced EMI.

Use Value: 105 A current rating and 0.45 °C/W R_θJC enable direct heatsink mounting without thermal interface pads, simplifying mechanical design.

Industrial Power Supplies

Load Switching

Use Scenario: Main switch in 800 W AC-DC front-end PFC stage with 65 kHz interleaved boost topology.

IC Role / Device Role / Timing Role: Fast-switching, high-current switch with low Q_gd/Q_g ratio for reduced Miller-induced shoot-through risk.

Use Value: Q_gd = 20.2 nC typ ensures stable gate control under high dV/dt conditions, improving reliability over 10-year field life.

Use Scenario: Hot-swap and inrush current limiting in 48 V server backplane distribution.

IC Role / Device Role / Timing Role: Single-ended load switch with integrated avalanche ruggedness for fault tolerance.

Use Value: 100% UIS testing guarantees survival under 100 ms short-circuit events, eliminating need for external fuses or circuit breakers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP80NF55-08	R_DS(ON) = 8.0 mΩ @ 10 V; Q_g = 120 nC; TO-220 package; R_θJC = 0.65 °C/W	Higher conduction loss and gate drive power; lower thermal performance limits peak power handling	Select when cost sensitivity outweighs efficiency and thermal constraints; not recommended for >150 kHz operation.
IRFP4868PBF	R_DS(ON) = 6.8 mΩ @ 10 V; Q_g = 115 nC; TO-247 package; no 100% UIS test data published	Marginally lower R_DS(ON) but significantly higher Q_g and unverified avalanche ruggedness	Prefer only if board layout accommodates larger TO-247 footprint and system lacks strict UIS requirements.

Compared with STP80NF55-08 and IRFP4868PBF, the AOW482 delivers superior switching efficiency per watt due to its optimized Q_g/R_DS(ON) ratio and guaranteed UIS performance - making it the preferred choice for compact, high-reliability 48–60 V industrial power stages where thermal headroom and fault tolerance are critical.

Availability

AOW482 is available at Aetrix Electronics and suitable for DC-DC converters, motor drives, and industrial power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp and maintenance programs.

Supply support for AOW482 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 AOW482 belongs to AOS's SDMOSTM trench-based N-Channel MOSFET product line, engineered specifically for high-efficiency, high-current switching in 48 V–80 V industrial and telecom power systems where thermal density and ruggedness are paramount.

FAQ

What is the maximum continuous drain current rating for the AOW482?

The AOW482 has a continuous drain current rating of 105 A at T_C = 25 °C, limited by package thermal capacity. At T_C = 100 °C, the rating drops to 82 A per the derating curve in the datasheet. This value is measured under steady-state conditions with proper heatsinking and reflects the device's ability to sustain high-current loads in industrial power switches and motor controllers.

Does the AOW482 support logic-level gate drive?

The AOW482 has a gate threshold voltage (V_GS(th)) range of 2.5–3.7 V, making it compatible with 3.3 V and 5 V logic-level gate drivers. However, full enhancement and minimum R_DS(ON) require V_GS ≥ 10 V. For optimal efficiency, use a dedicated gate driver capable of sourcing/sinking ≥2 A peak current to achieve fast t_r/t_f and minimize switching losses in the AOW482.

Is the AOW482 suitable for synchronous rectification applications?

Yes, the AOW482 is well-suited for synchronous rectification due to its low R_DS(ON) (<7.2 mΩ), low Q_rr (108 nC typ), and soft-recovery body diode (S > 1.5). These characteristics reduce reverse recovery losses and voltage spikes in secondary-side switching of LLC and phase-shifted full-bridge converters operating up to 1 MHz.

What thermal resistance values apply to the AOW482 in TO-262 package?

The AOW482 specifies R_θJC = 0.45 °C/W (junction-to-case) and R_θJA = 60 °C/W (junction-to-ambient, on 1 in² FR-4 board). The low R_θJC enables effective thermal coupling to external heatsinks, while R_θJA is used for worst-case ambient-limited designs without forced airflow or heatsinking.

How is avalanche ruggedness validated for the AOW482?

The AOW482 undergoes 100% Unclamped Inductive Switching (UIS) testing per JEDEC JESD24-1. Each unit is stressed with L = 0.1 mH, I_AR = 9 A, and E_AS = 167 mJ at T_J = 25 °C. This ensures every shipped AOW482 can withstand single-pulse inductive energy events without parametric shift or failure - critical for motor drive and relay replacement applications.

AOW482 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: SDMOS™

Package/Case:: TO-262-3 Long Leads, I2PAK, TO-262AA

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 80 V

Current - Continuous Drain (Id) @ 25°C:: 11A (Ta), 105A (Tc)

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

Rds On (Max) @ Id, Vgs:: 7.2mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 3.7V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 81 nC @ 10 V

Vgs (Max):: ±25V

Input Capacitance (Ciss) (Max) @ Vds:: 4870 pF @ 40 V

FET Feature:: -

Power Dissipation (Max):: 2.1W (Ta), 333W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-262

AOW482 FAQ

1.How can I place an order for AOW482 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOW482 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 AOW482 reliable?

The price and inventory of AOW482 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOW482 is usually 5 days.

3.What payment methods are accepted for AOW482?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOW482 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOW482?

AOW482 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOW482 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 AOW482?

For technical support, including AOW482 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOW482 requirements.

6.How does Aetrix verify that AOW482 is sourced from the original manufacturer or authorized distributors?

All AOW482 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 AOW482 meets industry standards.

7.What is the process for return or replacement of AOW482?

All AOW482 units undergo pre-shipment inspection (PSI). If there is an issue with AOW482, 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 AOW482 part is unused and in its original packaging.

Return procedure for AOW482:

1.Submit a request within 90 days.

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

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