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

Alpha & Omega Semiconductor Inc. AOT600A70L

Name: AOT600A70L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOT600A70L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOT600A70L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AOT600A70L.pdf

Description:: MOSFET N-CH 700V 8.5A TO220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOT600A70L from Alpha & Omega Semiconductor is a 700 V, 34 A N-channel MOSFET in TO-220 package, featuring 0.51 Ω typical R_DS(ON), 15.5 nC total gate charge, and 100% UIS-tested ruggedness for high-voltage flyback and PD adapter primary-side switching.

For engineers reviewing the AOT600A70L datasheet, pinout, applications, or equivalent options, this device delivers verified avalanche robustness, low E_oss (1.8 mJ @ 400 V), and enhanced body diode recovery (T_rr = 245 ns) critical for high-efficiency, compact AC/DC power supplies.

Technical Context

The AOT600A70L employs Alpha & Omega's proprietary aMOS5™ technology to achieve low conduction loss while maintaining fast switching: t_d(on) = 22 ns, t_r = 10 ns, t_d(off) = 36 ns, and t_f = 8 ns under standard test conditions (V_GS = 10 V, V_DS = 400 V, I_D = 4 A, R_G = 5 Ω). Its 800 V BVDSS rating with positive temperature coefficient ensures stable operation at elevated junction temperatures.

Thermal design is supported by R_θJC = 4.6 °C/W and R_θCA = 65 °C/W, enabling reliable 27 W continuous power dissipation at T_C = 25 °C. The device is 100% R_G-tested and qualified for industrial-grade operation across –55 °C to +150 °C junction temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	700 V - Maximum drain-source blocking voltage; supports 400 V DC bus designs with 1.75× safety margin.
R_DS(ON), typ	0.51 Ω @ V_GS = 10 V - Enables <2.5 W conduction loss at 3.5 A RMS in 65 kHz flyback converters.
Q_g, typ	15.5 nC - Low gate drive energy reduces controller IC loading and improves light-load efficiency.
E_oss @ 400 V	1.8 mJ - Minimizes turn-off switching loss in hard-switched topologies like QR flyback.
T_rr	245 ns - Fast body diode recovery suppresses voltage spikes and EMI in discontinuous conduction mode.
I_DM	34 A - Peak pulsed current rating supports surge handling during startup and overload conditions.
BVDSS Tempco	+0.6 V/°C - Positive coefficient improves parallel operation stability and thermal runaway immunity.

Pinout & Package

Package: TO-220 (Green, RoHS-compliant, non-isolated tab). Mounting surface is electrically connected to drain terminal.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Control input; requires 10 V drive for full enhancement; ±20 V max rating limits gate driver selection.
D	Drain	Main high-side switching node; connected to heatsink tab; must be isolated if heatsink is grounded.
S	Source	Power return path and reference for gate drive; source inductance directly impacts switching speed and ringing.

Key Features

Feature	Design Value
aMOS5™ process technology	Enables simultaneous optimization of R_DS(ON), Q_g, and E_oss - not achievable with planar or trench-only processes.
100% UIS tested	Guarantees unclamped inductive switching survival up to rated I_AS = 8.5 A, eliminating need for external snubbers in many flyback designs.
Enhanced body diode	Reduces reverse recovery charge Q_rr to 3 mC and peak reverse recovery current I_RM to 18.6 A - lowers diode-induced EMI and stress on clamp components.
Optimized for EMI	Controlled dv/dt (100 V/ns) and reduced Crss (1.3 pF) minimize coupling into control circuitry and simplify EMI filter design.

Applications

Flyback SMPS Primary Switch	USB-PD Adapter Power Stage
Use Scenario: High-efficiency, 65–100 W offline flyback converter operating at 65–130 kHz with quasi-resonant control. IC Role / Device Role / Timing Role: Main high-side switching transistor; synchronized with controller's zero-voltage switching detection. Use Value: Low R_DS(ON) and E_oss reduce conduction and turn-off losses; 100% UIS testing eliminates derating for transformer leakage energy.	Use Scenario: Compact 65 W USB-PD wall adapter with dual-output (5 V/3 A, 20 V/3.25 A) and active clamp-free topology. IC Role / Device Role / Timing Role: Primary-side power switch; handles 400 V DC link and withstands 1.5× surge during brown-in events. Use Value: Fast T_rr and low Q_gd/Q_gs ratio enable clean turn-off transitions, reducing common-mode noise and easing CISPR-32 compliance.
LED Driver Secondary Regulation	Industrial AC-DC Auxiliary Supply
Use Scenario: Constant-current LED driver with primary-side regulation and integrated PFC stage feeding a 400 V DC bus. IC Role / Device Role / Timing Role: High-voltage switch in boost PFC pre-regulator; operates in continuous conduction mode at 50–100 kHz. Use Value: 800 V BVDSS rating accommodates line surges up to 300 VAC RMS without overvoltage failure; R_θJC = 4.6 °C/W enables direct heatsink mounting.	Use Scenario: 15 W auxiliary power supply for PLC I/O modules, supporting wide-input 85–265 VAC and -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Primary-side switch in low-cost flyback; operates with fixed-frequency PWM and integrated optocoupler feedback. Use Value: Robust -55°C to +150°C TJ range and 100% R_G screening ensure long-term reliability in thermally constrained enclosures.

Flyback SMPS Primary Switch

USB-PD Adapter Power Stage

Use Scenario: High-efficiency, 65–100 W offline flyback converter operating at 65–130 kHz with quasi-resonant control.

IC Role / Device Role / Timing Role: Main high-side switching transistor; synchronized with controller's zero-voltage switching detection.

Use Value: Low R_DS(ON) and E_oss reduce conduction and turn-off losses; 100% UIS testing eliminates derating for transformer leakage energy.

Use Scenario: Compact 65 W USB-PD wall adapter with dual-output (5 V/3 A, 20 V/3.25 A) and active clamp-free topology.

IC Role / Device Role / Timing Role: Primary-side power switch; handles 400 V DC link and withstands 1.5× surge during brown-in events.

Use Value: Fast T_rr and low Q_gd/Q_gs ratio enable clean turn-off transitions, reducing common-mode noise and easing CISPR-32 compliance.

LED Driver Secondary Regulation

Industrial AC-DC Auxiliary Supply

Use Scenario: Constant-current LED driver with primary-side regulation and integrated PFC stage feeding a 400 V DC bus.

IC Role / Device Role / Timing Role: High-voltage switch in boost PFC pre-regulator; operates in continuous conduction mode at 50–100 kHz.

Use Value: 800 V BVDSS rating accommodates line surges up to 300 VAC RMS without overvoltage failure; R_θJC = 4.6 °C/W enables direct heatsink mounting.

Use Scenario: 15 W auxiliary power supply for PLC I/O modules, supporting wide-input 85–265 VAC and -40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Primary-side switch in low-cost flyback; operates with fixed-frequency PWM and integrated optocoupler feedback.

Use Value: Robust -55°C to +150°C TJ range and 100% R_G screening ensure long-term reliability in thermally constrained enclosures.

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
STP7NK80ZFP	800 V BVDSS, 7 A I_D, R_DS(ON) = 1.4 Ω, Q_g = 29 nC - higher conduction loss, slower switching.	Lower current rating limits use to ≤25 W designs; unsuitable for 65 W PD adapters requiring >30 A peak.	Select only when cost sensitivity outweighs efficiency and size requirements; verify SOA at 125°C.
IPP60R190C7	600 V BVDSS, 21 A I_D, R_DS(ON) = 0.19 Ω, Q_g = 32 nC - lower voltage rating, higher gate charge.	Not rated for 400 V DC bus with safety margin; requires redesign of clamp network and transformer turns ratio.	Use only in 230 VAC-only systems with strict input filtering; avoid in universal-input or surge-prone environments.

Compared with STP7NK80ZFP and IPP60R190C7, the AOT600A70L uniquely balances 700 V rating, 34 A peak capability, and 15.5 nC gate charge - enabling smaller magnetics, lower heatsink mass, and simplified EMI filtering in universal-input 65 W adapters without compromising ruggedness.

Availability

AOT600A70L is available at Aetrix Electronics and suitable for flyback SMPS, USB-PD adapters, LED drivers, and industrial auxiliary supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant TO-220 packaging.

Supply support for AOT600A70L 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 AOT600A70L belongs to AOS's aMOS5™ high-voltage MOSFET product line, engineered specifically for high-efficiency, compact AC/DC conversion in space-constrained power adapters and lighting systems.

FAQ

What is the maximum continuous drain current rating for AOT600A70L at 100°C case temperature?

The AOT600A70L supports 8.5 A continuous drain current at T_C = 100°C, as specified in its Absolute Maximum Ratings table. This derated value reflects thermal limitations when mounted on a standard heatsink without forced airflow, and aligns with the device's R_θJC = 4.6 °C/W and T_J(MAX) = 150°C rating. At T_C = 25°C, the rating rises to 34 A.

Does AOT600A70L have a fully characterized body diode for synchronous rectification?

No - the AOT600A70L features an enhanced body diode optimized for robustness and fast reverse recovery (T_rr = 245 ns, Q_rr = 3 mC), but it is not designed or characterized for synchronous rectification duty. Its body diode is intended for freewheeling and clamping in flyback and resonant topologies, not for bidirectional conduction control.

Is AOT600A70L pin-compatible with AOTF600A70L or AOB600A70L?

No - AOT600A70L (TO-220) uses a 3-pin through-hole package with G-D-S pinout, while AOTF600A70L (TO-220F) has insulated tab and AOB600A70L (TO-263/D2PAK) is surface-mount. Pin functions match (G-D-S), but mechanical form factor, thermal interface, and PCB layout are not interchangeable without redesign.

What is the gate threshold voltage range for AOT600A70L, and how does it affect drive circuit design?

The AOT600A70L has a gate threshold voltage V_GS(th) of 2.9 V to 4.1 V at T_J = 25°C. This relatively narrow range ensures consistent turn-on behavior across temperature and unit-to-unit variation. Drive circuits must deliver ≥10 V to guarantee full enhancement and minimize R_DS(ON); gate resistors should be selected to limit peak current while controlling dv/dt per the device's 100 V/ns rating.

Can AOT600A70L be used in avalanche mode for energy recycling in ZVS circuits?

Yes - the AOT600A70L is 100% UIS-tested with I_AS = 8.5 A and E_AS = 19 mJ, confirming controlled avalanche capability. It can safely absorb inductive energy during zero-voltage switching transitions, provided the single-pulse avalanche energy remains within the rated limit and the junction temperature stays below 150°C. Layout must minimize stray inductance to prevent overshoot.

AOT600A70L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: aMOS5™

Package/Case:: TO-220-3

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:: 8.5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 600mOhm @ 2.5A, 10V

Vgs(th) (Max) @ Id:: 3.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 15.5 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 870 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 104W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

AOT600A70L FAQ

1.How can I place an order for AOT600A70L through Aetrix?

Please submit a Request for Quotation (RFQ) for AOT600A70L 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 AOT600A70L reliable?

The price and inventory of AOT600A70L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOT600A70L is usually 5 days.

3.What payment methods are accepted for AOT600A70L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOT600A70L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOT600A70L?

AOT600A70L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOT600A70L 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 AOT600A70L?

For technical support, including AOT600A70L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOT600A70L requirements.

6.How does Aetrix verify that AOT600A70L is sourced from the original manufacturer or authorized distributors?

All AOT600A70L 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 AOT600A70L meets industry standards.

7.What is the process for return or replacement of AOT600A70L?

All AOT600A70L units undergo pre-shipment inspection (PSI). If there is an issue with AOT600A70L, 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 AOT600A70L part is unused and in its original packaging.

Return procedure for AOT600A70L:

1.Submit a request within 90 days.

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

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