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

Alpha & Omega Semiconductor Inc. AOT482L

Name: AOT482L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOT482L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOT482L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AOT482L.pdf

Description:: MOSFET N-CH 80V 11A/105A TO220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOT482L 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 at T_C = 25°C, and 100% UIS-tested ruggedness for high-reliability power switching in DC-DC converters, motor drives, and industrial load switches.

For engineers reviewing the AOT482L datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Q_g = 66.8 nC typ), fast switching (t_r = 18 ns, t_f = 21 ns), body-diode soft recovery (Q_rr = 108 nC typ), TO-220 package thermal performance (R_θJC = 0.45°C/W), and avalanche-rated operation (E_AS rated).

Technical Context

The AOT482L employs SDMOSTM trench-gate process to simultaneously optimize conduction loss (R_DS(ON) < 7.2 mΩ @ 10 V), switching loss (Q_g = 66.8 nC, Q_gd = 20.2 nC), and body-diode behavior (Q_rr = 108 nC, t_rr = 26 ns). Its gate threshold voltage (2.5–3.7 V) ensures robust TTL/CMOS drive compatibility.

Rated for 175°C maximum junction temperature and 100% unclamped inductive switching (UIS) tested, the device supports high-duty-cycle, thermally constrained applications such as synchronous rectification and high-frequency PWM control where thermal stability and avalanche immunity are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	80 V - Maximum blocking voltage for 48 V bus systems with 20% margin
I_D (T_C = 25°C)	105 A - Continuous current capability with standard heatsink mounting
R_DS(ON) (V_GS = 10 V)	< 7.2 mΩ - Low conduction loss enabling <1.5 W dissipation at 50 A
Q_g (10 V)	66.8 nC typ - Enables efficient 100–500 kHz switching with moderate gate driver strength
E_AS	Rated - 100% UIS tested to ensure reliable energy absorption during inductive turn-off
Body Diode Q_rr	108 nC typ - Low reverse recovery charge reduces diode-induced switching loss and EMI
R_θJC	0.45°C/W - Enables >100 W power dissipation with active heatsinking

Pinout & Package

Package: TO-220 (3-pin, through-hole, isolated tab). The drain-connected tab provides direct thermal path to heatsink; source and gate pins are on the lead frame edge.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control terminal	Receives 10 V logic-level signal; low input capacitance (C_iss = 4054 pF) minimizes driver loading
D (Drain)	High-side power node	Connected to heatsink tab; electrically tied to drain metallization for low-inductance thermal/power path
S (Source)	Reference node / return path	Common reference for gate drive and load current; enables standard high-side or low-side configuration

Key Features

Feature	Design Value
SDMOSTM trench process	Enables simultaneous optimization of R_DS(ON), Q_g, and Q_rr - no trade-off between conduction and switching loss
100% UIS testing	Guarantees single-pulse avalanche energy handling without derating - eliminates need for external snubbers in inductive loads
Low Q_gd/Q_g ratio (0.30 typ)	Improves Miller immunity and enables stable hard-switching up to 500 kHz
Soft-recovery body diode	t_rr = 26 ns with softness factor S > 1 - reduces voltage overshoot and EMI in freewheeling paths
100% R_g tested	Ensures consistent gate resistance (0.2–0.7 Ω) for predictable turn-on/turn-off timing across production lots

Applications

DC-DC Buck Converter	Industrial Motor Drive
Use Scenario: High-efficiency 48 V input to 12 V output step-down converter operating at 300 kHz. IC Role / Device Role: Primary synchronous rectifier switch handling 60 A continuous current. Use Value: Low R_DS(ON) and Q_g reduce conduction + switching losses; soft body diode eliminates need for external Schottky catch diode.	Use Scenario: 3-phase inverter stage for 1–3 kW BLDC motor control in HVAC blowers. IC Role / Device Role: Low-side power switch in IGBT/MOSFET half-bridge modules. Use Value: 100% UIS rating withstands motor back-EMF transients; 175°C TJ max supports sealed enclosure thermal design.
Server PSU ORing	Telecom Hot-Swap Circuit
Use Scenario: Redundant 12 V power rail ORing in enterprise server PSUs. IC Role / Device Role: Load switch controlling power path from multiple PSUs to common bus. Use Value: Ultra-low R_DS(ON) minimizes voltage drop and heat generation; fast turn-off (t_f = 21 ns) prevents cross-conduction during fault isolation.	Use Scenario: Inrush-limited hot-swap controller for 48 V line cards in telecom chassis. IC Role / Device Role: Main pass element in linear or hybrid hot-swap FET circuit. Use Value: Robust gate oxide (±25 V V_GS) tolerates transient overvoltage; 105 A pulsed rating handles startup surge currents.

DC-DC Buck Converter

Industrial Motor Drive

Use Scenario: High-efficiency 48 V input to 12 V output step-down converter operating at 300 kHz.

IC Role / Device Role: Primary synchronous rectifier switch handling 60 A continuous current.

Use Value: Low R_DS(ON) and Q_g reduce conduction + switching losses; soft body diode eliminates need for external Schottky catch diode.

Use Scenario: 3-phase inverter stage for 1–3 kW BLDC motor control in HVAC blowers.

IC Role / Device Role: Low-side power switch in IGBT/MOSFET half-bridge modules.

Use Value: 100% UIS rating withstands motor back-EMF transients; 175°C TJ max supports sealed enclosure thermal design.

Server PSU ORing

Telecom Hot-Swap Circuit

Use Scenario: Redundant 12 V power rail ORing in enterprise server PSUs.

IC Role / Device Role: Load switch controlling power path from multiple PSUs to common bus.

Use Value: Ultra-low R_DS(ON) minimizes voltage drop and heat generation; fast turn-off (t_f = 21 ns) prevents cross-conduction during fault isolation.

Use Scenario: Inrush-limited hot-swap controller for 48 V line cards in telecom chassis.

IC Role / Device Role: Main pass element in linear or hybrid hot-swap FET circuit.

Use Value: Robust gate oxide (±25 V V_GS) tolerates transient overvoltage; 105 A pulsed rating handles startup surge currents.

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
IRF1404PBF	R_DS(ON) = 4 mΩ (lower), but Q_g = 131 nC (2× higher); no UIS rating; TO-220 package	Lacks 100% UIS test and soft-body-diode specs - unsuitable for unclamped inductive switching	Select only for pure resistive or low-dI/dt loads where switching speed is secondary to R_DS(ON)
STP80NF55-08	R_DS(ON) = 8.5 mΩ (higher), Q_g = 120 nC (nearly 2×), Q_rr = 220 nC (2× higher); TO-220	Higher switching loss and slower recovery increase system EMI and thermal stress in high-frequency designs	Acceptable only in legacy 50–100 kHz designs where gate drive strength is abundant and diode recovery is not critical

Compared with IRF1404PBF and STP80NF55-08, the AOT482L delivers superior balance of low R_DS(ON), low Q_g, and controlled body-diode recovery - making it optimal for modern high-frequency, high-reliability power stages where both efficiency and ruggedness are required.

Availability

AOT482L is available at Aetrix Electronics and suitable for DC-DC converters, industrial motor drives, and telecom hot-swap circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing from qualified manufacturing lots.

Supply support for AOT482L 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 AOT482L belongs to AOS's SDMOSTM trench-MOSFET product line, engineered for high-efficiency, high-reliability power conversion in applications demanding low conduction loss, fast switching, and robust avalanche capability.

FAQ

What is the maximum continuous drain current rating for the AOT482L at 100°C case temperature?

The AOT482L supports 82 A continuous drain current at T_C = 100°C, as specified in the Absolute Maximum Ratings table. This derated value reflects thermal limitations under sustained high-temperature operation and must be validated against actual PCB layout, heatsink interface, and ambient conditions. The AOT482L maintains full functionality and UIS rating across this range.

Does the AOT482L have a specified gate threshold voltage range, and how does it affect drive compatibility?

Yes, the AOT482L has a gate threshold voltage (V_GS(th)) of 2.5–3.7 V at T_J = 25°C. This range ensures reliable turn-on with standard 3.3 V or 5 V logic-level drivers while maintaining noise immunity. At elevated temperatures, V_GS(th) decreases slightly, which is accounted for in the device's safe operating area curves.

Is the AOT482L suitable for synchronous rectification in a 48 V to 12 V buck converter?

Yes, the AOT482L is well-suited for synchronous rectification in that topology. Its R_DS(ON) < 7.2 mΩ at 10 V gate drive minimizes conduction loss, while its Q_g = 66.8 nC and fast switching times (t_r = 18 ns, t_f = 21 ns) enable efficient operation at 300–500 kHz. The soft-recovery body diode further reduces dead-time-related losses.

What thermal resistance values are specified for the AOT482L in TO-220 package?

The AOT482L specifies R_θJC = 0.45°C/W (junction-to-case) and R_θJA = 60°C/W (junction-to-ambient, measured on 1 in² FR-4 board with 2 oz copper). These values allow accurate thermal modeling: for example, at 100 W dissipation with a 2°C/W heatsink, junction temperature rise is ~47°C above case temperature.

How is the AOT482L's avalanche ruggedness verified, and what does "100% UIS tested" mean?

"100% UIS tested" means every AOT482L unit undergoes unclamped inductive switching stress per JEDEC JESD24-11, verifying minimum single-pulse avalanche energy (E_AS) capability. This ensures robustness against inductive kickback in motor drives and relay coils without requiring external protection components.

AOT482L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: SDMOS™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Not For New Designs

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-220

AOT482L FAQ

1.How can I place an order for AOT482L through Aetrix?

Please submit a Request for Quotation (RFQ) for AOT482L 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 AOT482L reliable?

The price and inventory of AOT482L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOT482L is usually 5 days.

3.What payment methods are accepted for AOT482L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOT482L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOT482L?

AOT482L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOT482L 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 AOT482L?

For technical support, including AOT482L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOT482L requirements.

6.How does Aetrix verify that AOT482L is sourced from the original manufacturer or authorized distributors?

All AOT482L 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 AOT482L meets industry standards.

7.What is the process for return or replacement of AOT482L?

All AOT482L units undergo pre-shipment inspection (PSI). If there is an issue with AOT482L, 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 AOT482L part is unused and in its original packaging.

Return procedure for AOT482L:

1.Submit a request within 90 days.

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

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