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

Alpha & Omega Semiconductor Inc. AOI360A70

Name: AOI360A70
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOI360A70
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOI360A70

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

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

Datasheet:: AOI360A70.pdf

Description:: MOSFET N-CH 700V 12A TO251A

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Product details

Overview

AOI360A70 from Alpha & Omega Semiconductor is a 700V N-channel MOSFET in TO-251A (IPAK) package, featuring 0.36Ω max R_DS(ON), 48A pulsed drain current, and 22.5nC typical gate charge. It uses proprietary aMOS5™ technology and is optimized for flyback SMPS, PD adapters, and lighting applications requiring high-voltage switching with robust avalanche capability.

For engineers reviewing the AOI360A70 datasheet, pinout, applications, or equivalent options, this device delivers verified UIS ruggedness, 100% R_g tested gate resistance, and enhanced body diode recovery (T_rr = 310ns, Q_rr = 4.8mC) critical for high-efficiency, EMI-sensitive power converters.

Technical Context

The AOI360A70 employs aMOS5™ trench-gate process to achieve low conduction loss while maintaining fast switching performance. Its 0.316Ω typical R_DS(ON) at V_GS = 10V and 6A enables high efficiency in 400–600V DC-link topologies, and its 2.8mJ E_oss at 400V supports soft-switching operation in resonant converters.

Thermal design is supported by R_θJC = 0.9°C/W and R_θCS = 0.5°C/W, enabling direct heatsink mounting. The device's 138V/ns dv/dt ruggedness and 100% UIS testing ensure reliability under transient overvoltage conditions common in offline SMPS.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	700V maximum - supports 400V AC-input flyback designs with margin for surge and ringing
R_DS(ON), max	0.36Ω at V_GS = 10V - limits conduction loss to ≤1.3W at 6A continuous drain current
Q_g, typ	22.5nC - determines gate drive power requirement and switching speed in 100–500kHz converters
E_oss @ 400V	2.8mJ - defines energy dissipated during turn-on in hard-switched topologies
T_J range	−55°C to +150°C - enables operation in industrial and outdoor lighting environments
T_rr	310ns - enables fast body-diode commutation in synchronous rectification and LLC half-bridge
P_D	45W at T_C = 25°C - sets thermal limit for PCB-mounted heatsinking without forced air

Pinout & Package

AOI360A70 is housed in a TO-251A (IPAK) surface-mount package with gull-wing leads. The case is electrically connected to the drain terminal, and the package features exposed drain pad for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Control input; requires 10V drive for full enhancement; R_g = 2Ω internal
D	Drain	Main high-side switching node; electrically tied to exposed tab for thermal path
S	Source	Power return reference; connects to ground or low-side switch source in half-bridge

Key Features

Feature	Design Value
aMOS5™ trench technology	Enables 0.316Ω typical R_DS(ON) at 10V drive while retaining 700V breakdown rating
Enhanced body diode	310ns reverse recovery time and 4.8mC Q_rr reduce switching loss and EMI in discontinuous conduction mode
100% UIS tested	Guarantees unclamped inductive switching survival up to rated I_AS = 20A, critical for flyback transformer reset
Optimized EMI profile	Low Crss (1.7pF) and controlled dv/dt (138V/ns) suppress radiated emissions in compact adapters

Applications

Flyback SMPS	USB-PD Adapters
Use Scenario: 65W universal-input offline flyback converter operating at 100kHz with primary-side regulation. IC Role / Device Role / Timing Role: Primary-side high-voltage switch handling 600V DC-link voltage and 48A pulsed current during startup. Use Value: Low R_DS(ON) reduces conduction loss; 100% UIS testing ensures reliability during transformer saturation events.	Use Scenario: Compact dual-port USB-PD wall adapter with GaN-assisted active clamp flyback topology. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier driver or auxiliary high-side switch in clamp circuit. Use Value: Fast body diode (T_rr = 310ns) minimizes dead-time loss; low Q_g enables efficient gate driving from low-power controllers.
LED Lighting Drivers	TV Power Supplies
Use Scenario: Constant-current buck-boost LED driver for commercial downlights with 300–400V DC bus. IC Role / Device Role / Timing Role: High-side switch in non-isolated buck-boost stage operating at 50–150kHz. Use Value: 700V rating accommodates line surges; R_θJC = 0.9°C/W allows direct heatsink attachment on metal-core PCBs.	Use Scenario: Main power switch in 120W TV standby and main SMPS with PFC front-end. IC Role / Device Role / Timing Role: Primary-side switch in quasi-resonant flyback delivering 12V/5V rails. Use Value: 2.8mJ E_oss at 400V enables zero-voltage switching transition; 100% R_g test ensures consistent gate timing across production lots.

Flyback SMPS

USB-PD Adapters

Use Scenario: 65W universal-input offline flyback converter operating at 100kHz with primary-side regulation.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch handling 600V DC-link voltage and 48A pulsed current during startup.

Use Value: Low R_DS(ON) reduces conduction loss; 100% UIS testing ensures reliability during transformer saturation events.

Use Scenario: Compact dual-port USB-PD wall adapter with GaN-assisted active clamp flyback topology.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier driver or auxiliary high-side switch in clamp circuit.

Use Value: Fast body diode (T_rr = 310ns) minimizes dead-time loss; low Q_g enables efficient gate driving from low-power controllers.

LED Lighting Drivers

TV Power Supplies

Use Scenario: Constant-current buck-boost LED driver for commercial downlights with 300–400V DC bus.

IC Role / Device Role / Timing Role: High-side switch in non-isolated buck-boost stage operating at 50–150kHz.

Use Value: 700V rating accommodates line surges; R_θJC = 0.9°C/W allows direct heatsink attachment on metal-core PCBs.

Use Scenario: Main power switch in 120W TV standby and main SMPS with PFC front-end.

IC Role / Device Role / Timing Role: Primary-side switch in quasi-resonant flyback delivering 12V/5V rails.

Use Value: 2.8mJ E_oss at 400V enables zero-voltage switching transition; 100% R_g test ensures consistent gate timing across production lots.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP7NK70ZFP	700V, 7A, R_DS(ON) = 1.4Ω, TO-220FP package, no UIS rating specified	Lower current rating and higher R_DS(ON) limit use to <25W designs; through-hole only	Select when cost sensitivity outweighs efficiency and surface-mount requirements
IXTH30N60L2	600V, 30A, R_DS(ON) = 0.22Ω, TO-247 package, 100% UIS tested	Lower voltage rating restricts to 380V DC-link; larger footprint increases layout area	Choose for higher current density where 600V margin suffices and thermal mass is prioritized

Compared with STP7NK70ZFP and IXTH30N60L2, the AOI360A70 uniquely balances 700V rating, 48A pulse capability, and TO-251A surface-mount form factor-enabling compact, high-efficiency flyback designs without sacrificing surge robustness or thermal performance.

Availability

AOI360A70 is available at Aetrix Electronics and suitable for flyback SMPS, USB-PD adapters, and LED lighting drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing from qualified distributors.

Supply support for AOI360A70 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 AOI360A70 belongs to AOS' aMOS5™ high-voltage MOSFET product line, engineered specifically for high-efficiency, high-reliability offline power conversion in space-constrained applications such as chargers, adapters, and lighting.

FAQ

What is the maximum junction temperature rating for AOI360A70?

The AOI360A70 has a maximum junction temperature (T_J) rating of +150°C, validated across its full operating range and used as the thermal limit for safe continuous operation. This rating is referenced in all derating curves-including power dissipation (Figure 12), current rating (Figure 10), and transient thermal impedance (Figure 15). The AOI360A70 must be thermally managed to ensure T_J does not exceed this value under worst-case ambient and load conditions.

Does AOI360A70 have a specified gate threshold voltage range?

Yes, the AOI360A70 specifies a gate threshold voltage (V_GS(th)) range of 3.4V to 4.6V at T_J = 25°C and I_D = 250μA. This range ensures reliable turn-on with standard 5V or 10V gate drivers while avoiding unintended conduction due to noise. The AOI360A70 maintains usable enhancement down to ~3.4V, supporting partial-gate-drive schemes in low-power control stages.

Is AOI360A70 suitable for use in synchronous rectification circuits?

The AOI360A70 is not optimized for synchronous rectification due to its relatively high R_DS(ON) (0.36Ω max) and moderate body diode recovery (T_rr = 310ns). While it can function as a secondary-side switch in low-current flyback configurations, dedicated low-R_DS(ON), fast-recovery SR MOSFETs (e.g., AON6254) are preferred. The AOI360A70 is best applied on the primary side where its 700V rating and UIS ruggedness provide decisive advantage.

What is the thermal resistance from junction to case (R_θJC) for AOI360A70?

The AOI360A70 has a maximum junction-to-case thermal resistance (R_θJC) of 0.9°C/W, measured under standardized test conditions with the device mounted to a large heatsink. This value enables accurate thermal modeling when the TO-251A drain tab is soldered directly to a copper heatsink or thermal pad. The AOI360A70's low R_θJC supports high-power density designs where board-level heatsinking is essential.

How is the avalanche capability of AOI360A70 verified?

The AOI360A70 undergoes 100% unclamped inductive switching (UIS) testing per JEDEC JESD24-11, with each unit validated at rated I_AS = 20A and E_AS = 7.6mJ. This ensures single-pulse avalanche robustness during transformer reset or short-circuit transients. The AOI360A70 datasheet confirms that all production units pass this test-no screening or sampling is performed-and the result is guaranteed across temperature and process variation.

AOI360A70 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: aMOS5™

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):: 700 V

Current - Continuous Drain (Id) @ 25°C:: 12A (Tc)

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

Rds On (Max) @ Id, Vgs:: 360mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 22.5 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1360 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 138W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-251A

AOI360A70 FAQ

1.How can I place an order for AOI360A70 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOI360A70 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 AOI360A70 reliable?

The price and inventory of AOI360A70 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOI360A70 is usually 5 days.

3.What payment methods are accepted for AOI360A70?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOI360A70 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOI360A70?

AOI360A70 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOI360A70 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 AOI360A70?

For technical support, including AOI360A70 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOI360A70 requirements.

6.How does Aetrix verify that AOI360A70 is sourced from the original manufacturer or authorized distributors?

All AOI360A70 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 AOI360A70 meets industry standards.

7.What is the process for return or replacement of AOI360A70?

All AOI360A70 units undergo pre-shipment inspection (PSI). If there is an issue with AOI360A70, 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 AOI360A70 part is unused and in its original packaging.

Return procedure for AOI360A70:

1.Submit a request within 90 days.

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

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