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

Alpha & Omega Semiconductor Inc. AOI468

Name: AOI468
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOI468
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOI468

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-251-3 Stub Leads, IPAK

Datasheet:: AOI468.pdf

Description:: MOSFET N CH 300V 11.5A TO252

Quantity:: RFQ Add To RFQ list

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Inventory:6,412

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Product details

Overview

AOI468 from Alpha & Omega Semiconductor is a 300V, 11.5A N-Channel MOSFET in TO-251A (IPAK) package, featuring R_DS(ON) < 0.42 Ω at V_GS = 10 V, 100% UIS tested, and guaranteed avalanche capability. It serves as a high-voltage switching element in offline AC-DC power supplies, synchronous rectifiers, and boost converters for telecom and industrial power systems.

For engineers reviewing the AOI468 datasheet, pinout, applications, or equivalent options, key selection criteria include its 300V V_DS, 11.5A continuous drain current at T_C = 25°C, 0.31–0.42 Ω R_DS(ON), 12.8 nC total gate charge, and TO-251A thermal performance with R_θJC = 0.5°C/W.

Technical Context

The AOI468 employs an advanced high-voltage MOSFET process optimized for robustness in AC-DC applications. Its low C_iss (632 pF typ), low C_rss (7 pF typ), and fast switching (t_D(on) = 18 ns, t_f = 20 ns) reduce switching losses in high-frequency converters.

Guaranteed unclamped inductive switching (UIS) and 100% R_g testing ensure reliability under transient stress. The device supports body-diode operation with V_SD = 0.74–1.0 V and Q_rr = 1.3 mC (typ), enabling use in synchronous rectification where reverse recovery behavior is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	300 V maximum - supports primary-side switching in universal-input offline SMPS up to 265 VAC.
I_D (T_C = 25°C)	11.5 A continuous - enables compact heatsink design in 65–150 W power supplies.
R_DS(ON)	0.31–0.42 Ω at V_GS = 10 V - reduces conduction loss and improves efficiency at full load.
Q_g	12.8 nC typical - balances gate drive strength and switching speed for <100 kHz operation.
E_AS	430 mJ single-pulse - withstands energy transients in boost PFC and flyback snubber circuits.
R_θJC	0.5 °C/W - allows direct mounting to heatsink for thermal management in high-power density designs.

Pinout & Package

AOI468 is housed in a TO-251A (IPAK) surface-mount package with gull-wing leads, offering improved thermal performance over DPAK while maintaining PCB footprint compatibility. The package features isolated drain tab for simplified heatsinking.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires 3.4–4.5 V threshold and ≤4.1 Ω gate resistance for stable turn-on/turn-off.
D	Drain	High-voltage power node; electrically connected to exposed drain tab for thermal and electrical path to heatsink.
S	Source	Reference node for gate drive and current sensing; forms return path for body diode conduction.

Key Features

Feature	Design Value
100% UIS tested	Validated avalanche ruggedness ensures reliable operation during inductive turn-off transients without derating.
Low C_rss (7 pF typ)	Minimizes Miller-induced shoot-through risk in half-bridge configurations and improves EMI profile.
Body diode Q_rr = 1.3 mC	Enables efficient synchronous rectification in secondary-side DC-DC stages with controlled reverse recovery.
R_θJC = 0.5 °C/W	Supports >15 W continuous power dissipation with minimal case-to-heatsink thermal interface resistance.

Applications

Boost Converters	Synchronous Rectifiers
Use Scenario: High-efficiency PFC stage in 100–200 W LED drivers and industrial adapters. IC Role / Device Role / Timing Role: Main switch operating at 65–135 kHz with hard-switched topology. Use Value: Low R_DS(ON) and UIS rating maintain efficiency and reliability under line surges and load transients.	Use Scenario: Secondary-side rectification in isolated LLC resonant converters for telecom power supplies. IC Role / Device Role / Timing Role: Synchronously gated replacement for Schottky diodes, driven by transformer-coupled gate signal. Use Value: Body diode Q_rr and low V_SD reduce conduction and switching losses versus discrete diodes.
Offline Flyback PSUs	Industrial AC-DC Adapters
Use Scenario: Primary-side switch in 36–75 W open-frame flyback supplies for IoT gateways and sensors. IC Role / Device Role / Timing Role: Self-oscillating or PWM-controlled high-side switch with integrated snubber interaction. Use Value: 300 V V_DS and 175°C T_J(max) support universal input (85–265 VAC) with margin for voltage spikes.	Use Scenario: Main switching element in 90–150 W enclosed AC-DC adapters for factory automation controllers. IC Role / Device Role / Timing Role: Fixed-frequency hard-switched MOSFET in discontinuous conduction mode (DCM) operation. Use Value: TO-251A package and R_θJC = 0.5 °C/W enable stable thermal performance in sealed enclosures without forced air.

Boost Converters

Synchronous Rectifiers

Use Scenario: High-efficiency PFC stage in 100–200 W LED drivers and industrial adapters.

IC Role / Device Role / Timing Role: Main switch operating at 65–135 kHz with hard-switched topology.

Use Value: Low R_DS(ON) and UIS rating maintain efficiency and reliability under line surges and load transients.

Use Scenario: Secondary-side rectification in isolated LLC resonant converters for telecom power supplies.

IC Role / Device Role / Timing Role: Synchronously gated replacement for Schottky diodes, driven by transformer-coupled gate signal.

Use Value: Body diode Q_rr and low V_SD reduce conduction and switching losses versus discrete diodes.

Offline Flyback PSUs

Industrial AC-DC Adapters

Use Scenario: Primary-side switch in 36–75 W open-frame flyback supplies for IoT gateways and sensors.

IC Role / Device Role / Timing Role: Self-oscillating or PWM-controlled high-side switch with integrated snubber interaction.

Use Value: 300 V V_DS and 175°C T_J(max) support universal input (85–265 VAC) with margin for voltage spikes.

Use Scenario: Main switching element in 90–150 W enclosed AC-DC adapters for factory automation controllers.

IC Role / Device Role / Timing Role: Fixed-frequency hard-switched MOSFET in discontinuous conduction mode (DCM) operation.

Use Value: TO-251A package and R_θJC = 0.5 °C/W enable stable thermal performance in sealed enclosures without forced air.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP3NK30ZFP	300 V, 2.5 A, R_DS(ON) = 2.2 Ω - lower current rating and higher on-resistance.	Only suitable for ≤30 W designs; lacks UIS rating and low-C_rss optimization.	Select when cost sensitivity outweighs power density and ruggedness requirements.
IXTP12N30P	300 V, 12 A, R_DS(ON) = 0.35 Ω - similar current but TO-220 package with R_θJC = 1.0 °C/W.	Requires larger heatsink volume; not surface-mount compatible with AOI468 layout.	Choose for through-hole assembly or legacy board reuse where thermal mass compensates for higher R_θJC.

Compared with STP3NK30ZFP and IXTP12N30P, the AOI468 delivers superior power density via TO-251A packaging, lower switching losses due to reduced C_rss and Q_g, and verified avalanche robustness-making it optimal for new compact, high-reliability AC-DC designs.

Availability

AOI468 is available at Aetrix Electronics and suitable for telecom power supplies, industrial AC-DC adapters, and LED backlighting systems requiring stable component supply and long-term manufacturing continuity.

Supply support for AOI468 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 AOI468 belongs to AOS's high-voltage N-Channel MOSFET product line, engineered specifically for rugged, high-efficiency offline power supply topologies including PFC, flyback, and resonant converters.

FAQ

What is the maximum junction temperature specification for AOI468?

The AOI468 has a maximum junction temperature (T_J) of 175°C, validated across all absolute maximum ratings and thermal derating curves. This rating enables operation in high-ambient environments such as enclosed industrial power supplies, and is supported by its R_θJC = 0.5°C/W and R_θJA = 55°C/W (on 1 in² FR-4 board). Thermal design must respect the 175°C limit to maintain reliability and UIS performance.

Does AOI468 support gate drive at 5 V logic level?

No - the AOI468 has a gate threshold voltage (V_GS(th)) range of 3.4–4.5 V, and its R_DS(ON) is specified only at V_GS = 10 V. At 5 V, the device operates in weak inversion with significantly elevated R_DS(ON) (>1.5 Ω), leading to excessive conduction loss and thermal runaway risk. AOI468 requires a 10 V ±10% gate drive for full enhancement and rated current handling.

Is AOI468 pin-compatible with AOD468?

No - AOI468 uses the TO-251A (IPAK) package with gull-wing leads, while AOD468 uses TO-252 (DPAK) with J-bend leads. Although both share identical silicon die and electrical specifications, their footprints, thermal pad layouts, and soldering profiles differ. Board redesign is required to substitute AOI468 for AOD468 or vice versa.

What does "100% UIS tested" mean for AOI468?

"100% UIS tested" means every AOI468 unit undergoes individual unclamped inductive switching stress test per JEDEC JESD24-11, using L = 60 mH, I_AS = 3.8 A, V_DD = 150 V, and R_G = 10 Ω. This validates avalanche energy handling (E_AS = 430 mJ) and ensures no latent defects that could cause failure during real-world inductive turn-off events in boost or flyback converters.

Can AOI468 be used in linear-mode (saturation) operation?

No - AOI468 is optimized for switching-mode operation only. Its Safe Operating Area (SOA) curve (Figure 9) shows severe derating in linear region: at V_DS = 50 V, maximum continuous ID drops to ~3 A at T_C = 25°C. Linear use risks thermal runaway due to positive temperature coefficient of R_DS(ON) and insufficient SOA margin. AOI468 must be operated in hard-switched or synchronous rectifier modes.

AOI468 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-251-3 Stub Leads, IPAK

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 300 V

Current - Continuous Drain (Id) @ 25°C:: 11.5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 420mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 16 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 790 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 150W (Tc)

Operating Temperature:: -50°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-251A

AOI468 FAQ

1.How can I place an order for AOI468 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOI468 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 AOI468 reliable?

The price and inventory of AOI468 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOI468 is usually 5 days.

3.What payment methods are accepted for AOI468?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOI468 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOI468?

AOI468 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOI468 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 AOI468?

For technical support, including AOI468 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOI468 requirements.

6.How does Aetrix verify that AOI468 is sourced from the original manufacturer or authorized distributors?

All AOI468 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 AOI468 meets industry standards.

7.What is the process for return or replacement of AOI468?

All AOI468 units undergo pre-shipment inspection (PSI). If there is an issue with AOI468, 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 AOI468 part is unused and in its original packaging.

Return procedure for AOI468:

1.Submit a request within 90 days.

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

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