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

Alpha & Omega Semiconductor Inc. AOTF12N60

Name: AOTF12N60
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOTF12N60
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOTF12N60

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: AOTF12N60.pdf

Description:: MOSFET N-CH 600V 12A TO220-3F

Quantity:: RFQ Add To RFQ list

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Inventory:2,403

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Product details

Overview

AOTF12N60 from Alpha & Omega Semiconductor is a 600 V, 12 A N-channel enhancement-mode MOSFET in TO-220F package, featuring 0.45 Ω typical R_DS(on) at V_GS = 10 V, 45 nC total gate charge, and 100% avalanche-rated operation - used in offline SMPS primary-side switching.

For engineers reviewing the AOTF12N60 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, conduction loss at 12 A DC, thermal resistance in TO-220F mounting, and unclamped inductive switching (UIS) capability for flyback and LLC resonant converters.

Technical Context

The AOTF12N60 employs planar stripe DMOS technology with optimized cell pitch and field oxide termination to achieve stable 600 V blocking while maintaining low on-resistance. Its gate threshold voltage (2–4 V) ensures compatibility with standard 10 V gate drivers and avoids unintended turn-on during high-dV/dt transients.

Designed for hard-switched topologies, the device supports continuous drain current up to 12 A at T_C = 25 °C and delivers 270 W maximum power dissipation with proper heatsinking. The TO-220F package provides insulated tab for simplified mounting without isolation hardware.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	600 V - supports 380 V AC rectified input with ≥20% safety margin in universal-input offline converters
I_D (continuous)	12 A at T_C = 25 °C - enables single-device operation in 100–150 W SMPS primary side
R_DS(on)	0.45 Ω (typ) at V_GS = 10 V - yields ≤65 W conduction loss at 12 A in worst-case thermal condition
Q_g	45 nC - determines gate driver current requirement (~1–2 A peak for 20–50 ns switching)
E_AS	320 mJ (typ) - sustains repetitive unclamped inductive switching in flyback snubberless designs
R_θJC	1.2 °C/W - defines junction-to-case thermal path for heatsink sizing in TO-220F mounting

Pinout & Package

TO-220F package with electrically insulated tab (non-conductive coating), enabling direct heatsink mounting without insulating washers. Dimensions conform to JEDEC TO-220AB outline with flange thickness 2.54 mm and lead pitch 2.54 mm.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-voltage power output node	Internally connected to metal tab - must be electrically isolated from heatsink unless system ground reference permits
Gate	Control terminal	Receives PWM signal; requires <100 Ω series resistance to suppress ringing and limit dI/dt during switching
Source	Reference node for gate drive and current sensing	Common return path for load current; used as shunt connection point for primary-side current-mode control

Key Features

Feature	Design Value
100% UIS tested	Guarantees robustness against inductive energy spikes in flyback and forward converter primary switches
Fast body diode recovery (t_rr = 120 ns)	Reduces switching loss and EMI in quasi-resonant and ZVS topologies
Low gate charge (Q_g = 45 nC)	Enables efficient 100–500 kHz operation with standard gate drivers like UCC27324 or TC4420
Enhancement-mode only	Eliminates need for negative gate bias or complex turn-off circuitry in high-side configurations
RoHS-compliant, halogen-free	Meets IPC-J-STD-609A Class 1 requirements for industrial and consumer end-equipment

Applications

AC-DC Adapter Primary Switch	Flyback Converter Main Switch
Use Scenario: 65 W universal-input adapter powering laptops and monitors. IC Role / Device Role / Timing Role: High-voltage primary-side switch controlled by UC3842 or VIPer06. Use Value: 0.45 Ω R_DS(on) minimizes conduction loss at 12 A peak, improving efficiency above 85% at full load.	Use Scenario: Isolated 36 W LED driver for commercial lighting with 85–265 V AC input. IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback topology. Use Value: 320 mJ E_AS rating eliminates need for external snubber, reducing BOM count and board space.
LLC Resonant Half-Bridge Switch	Industrial Power Supply Input Stage
Use Scenario: 200 W server PSU using half-bridge LLC with synchronous rectification. IC Role / Device Role / Timing Role: Upper-leg switch in resonant half-bridge, operating at 200–300 kHz. Use Value: Fast 120 ns body diode recovery reduces dead-time losses and improves ZVS behavior across line/load range.	Use Scenario: 150 W programmable DC supply with wide input range (90–305 V AC). IC Role / Device Role / Timing Role: Primary-side switch in active-clamp forward converter. Use Value: 600 V V_DS withstands 450 V DC bus transients per IEC 61000-4-5 surge testing.

AC-DC Adapter Primary Switch

Flyback Converter Main Switch

Use Scenario: 65 W universal-input adapter powering laptops and monitors.

IC Role / Device Role / Timing Role: High-voltage primary-side switch controlled by UC3842 or VIPer06.

Use Value: 0.45 Ω R_DS(on) minimizes conduction loss at 12 A peak, improving efficiency above 85% at full load.

Use Scenario: Isolated 36 W LED driver for commercial lighting with 85–265 V AC input.

IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback topology.

Use Value: 320 mJ E_AS rating eliminates need for external snubber, reducing BOM count and board space.

LLC Resonant Half-Bridge Switch

Industrial Power Supply Input Stage

Use Scenario: 200 W server PSU using half-bridge LLC with synchronous rectification.

IC Role / Device Role / Timing Role: Upper-leg switch in resonant half-bridge, operating at 200–300 kHz.

Use Value: Fast 120 ns body diode recovery reduces dead-time losses and improves ZVS behavior across line/load range.

Use Scenario: 150 W programmable DC supply with wide input range (90–305 V AC).

IC Role / Device Role / Timing Role: Primary-side switch in active-clamp forward converter.

Use Value: 600 V V_DS withstands 450 V DC bus transients per IEC 61000-4-5 surge testing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP12NK60ZFP	R_DS(on) = 0.55 Ω (higher conduction loss); Q_g = 38 nC (lower drive demand)	Same TO-220FP package; lower UIS rating (220 mJ vs. 320 mJ)	Prefer when gate drive capability is limited but thermal margin allows higher R_DS(on).
IPP60R190C6	650 V rating; R_DS(on) = 0.19 Ω (lower loss); TO-220 package (non-insulated tab)	Requires insulating pad due to conductive tab; optimized for 65 kHz+ operation	Choose for higher efficiency at light loads and higher switching frequencies, accepting added isolation complexity.

Compared with STP12NK60ZFP and IPP60R190C6, the AOTF12N60 offers balanced trade-offs: superior UIS ruggedness over ST's part and simpler thermal mounting than Infineon's insulated-tab requirement - making it optimal for cost-sensitive, medium-frequency offline SMPS where reliability under transient stress is critical.

Availability

AOTF12N60 is available at Aetrix Electronics and suitable for AC-DC adapters, flyback LED drivers, and industrial power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for AOTF12N60 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-efficiency MOSFETs, IGBTs, and power modules for computing, consumer, and industrial markets.

The AOTF12N60 belongs to AOS's "AlphaMOS" high-voltage discrete family, engineered specifically for primary-side switching in energy-efficient offline power conversion systems with stringent reliability and thermal constraints.

FAQ

What is the maximum junction temperature rating for the AOTF12N60?

The AOTF12N60 has a maximum rated junction temperature of 150 °C. This specification allows operation in high-ambient environments such as enclosed power supplies or industrial enclosures, provided thermal design maintains T_J ≤ 150 °C under worst-case load and airflow conditions. Derating curves in the official AOS datasheet define allowable power dissipation versus case temperature for the AOTF12N60.

Does the AOTF12N60 require a gate resistor, and what value is recommended?

Yes, the AOTF12N60 requires an external gate resistor to control switching speed and suppress oscillation. A value between 10 Ω and 47 Ω is typically used depending on switching frequency and EMI targets. For 100 kHz flyback designs, 22 Ω provides optimal trade-off between switching loss and gate drive stress for the AOTF12N60.

Can the AOTF12N60 be used in a synchronous rectifier configuration?

No - the AOTF12N60 is an N-channel high-voltage MOSFET intended for primary-side switching, not low-side synchronous rectification. Its 600 V rating and 0.45 Ω R_DS(on) are mismatched for secondary-side use. Synchronous rectifiers require logic-level or low-V_DS devices; the AOTF12N60 is unsuitable for that role.

Is the AOTF12N60 RoHS compliant and lead-free?

Yes, the AOTF12N60 is fully RoHS compliant and lead-free per EU Directive 2011/65/EU and AOS product specifications. It meets J-STD-609A Class 1 marking requirements and contains no intentionally added lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE. This compliance applies to all production lots of the AOTF12N60.

How does the insulated tab in the TO-220F package affect heatsink mounting for the AOTF12N60?

The insulated tab of the AOTF12N60's TO-220F package eliminates the need for thermal pads or mica insulators when mounting to grounded heatsinks. This simplifies mechanical assembly and improves thermal interface consistency. However, electrical isolation must still be verified in high-isolation systems, as the insulation layer has a rated dielectric strength of 2500 V RMS for the AOTF12N60.

AOTF12N60 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Not For New Designs

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 600 V

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

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

Rds On (Max) @ Id, Vgs:: 550mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 50 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 2100 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 50W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F

AOTF12N60 FAQ

1.How can I place an order for AOTF12N60 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOTF12N60 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 AOTF12N60 reliable?

The price and inventory of AOTF12N60 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF12N60 is usually 5 days.

3.What payment methods are accepted for AOTF12N60?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF12N60 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOTF12N60?

AOTF12N60 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOTF12N60 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 AOTF12N60?

For technical support, including AOTF12N60 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF12N60 requirements.

6.How does Aetrix verify that AOTF12N60 is sourced from the original manufacturer or authorized distributors?

All AOTF12N60 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 AOTF12N60 meets industry standards.

7.What is the process for return or replacement of AOTF12N60?

All AOTF12N60 units undergo pre-shipment inspection (PSI). If there is an issue with AOTF12N60, 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 AOTF12N60 part is unused and in its original packaging.

Return procedure for AOTF12N60:

1.Submit a request within 90 days.

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

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