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

Alpha & Omega Semiconductor Inc. AOTF4N60

Name: AOTF4N60
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOTF4N60
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOTF4N60

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: AOTF4N60.pdf

Description:: MOSFET N-CH 600V 4A TO220-3F

Quantity:: RFQ Add To RFQ list

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Inventory:3,955

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Product details

Overview

AOTF4N60 from Alpha & Omega Semiconductor is a 600 V, 4 A N-channel enhancement-mode MOSFET in TO-220F package, featuring 2.5 Ω typical R_DS(on) at V_GS = 10 V, 100% avalanche-rated operation, and designed for offline AC-DC power supplies and LED drivers.

For engineers reviewing the AOTF4N60 datasheet, pinout, applications, or equivalent options, key selection factors include its 600 V blocking voltage, 4 A continuous drain current rating, TO-220F insulated package enabling direct heatsink mounting without isolation hardware, and rugged unclamped inductive switching capability.

Technical Context

The AOTF4N60 operates as a high-voltage power switch in flyback and buck-derived topologies, with gate threshold voltage (V_GS(th)) of 2.0–4.0 V ensuring reliable turn-on with standard 5 V or 10 V gate drivers. Its 100% rated UIS (unclamped inductive switching) supports robust operation under transient overloads.

Thermal performance is defined by R_θJC = 2.5 °C/W and R_θJA = 62 °C/W (on FR-4, 1 in² copper), and the device meets JEDEC JESD47 reliability standards for high-voltage power MOSFETs used in industrial and lighting applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	600 V - supports universal input AC-DC designs up to 265 VAC with margin
I_D (continuous)	4 A @ T_C = 25 °C - defines maximum steady-state conduction capability with heatsink
R_DS(on) (typ)	2.5 Ω @ V_GS = 10 V - determines conduction loss in primary-side switching applications
Q_g (total)	19 nC - impacts gate drive power and switching speed in 50–100 kHz SMPS designs
E_AS	320 mJ - enables reliable operation during inductive load switching without external snubbers
Package	TO-220F - fully insulated case allows direct mounting to grounded heatsinks without thermal pads or insulators

Pinout & Package

TO-220F package with insulated metal tab; dimensions per Alpha & Omega Semiconductor outline PO-00059, including 3.18 mm diameter mounting hole (∅P), 15.87 mm body width (D), and 10.96 mm height (L).

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-voltage power output node	Electrically connected to metal tab; requires insulated mounting when referenced to ground
Source	Power return path and gate reference	Low-impedance connection to PCB ground plane; sets local V_GS reference
Gate	Control input for channel conduction	High-impedance MOS gate requiring <1 µA bias; sensitive to ESD and ringing

Key Features

Feature	Design Value
100% UIS tested	Guarantees safe operation under worst-case inductive turn-off transients without derating
TO-220F insulated package	Eliminates need for mica washers or silicone pads when mounting to conductive heatsinks
Low gate charge (Q_g = 19 nC)	Reduces driver losses and enables use of low-cost SOT-23 gate drivers in cost-sensitive designs
Fast body diode (t_rr = 120 ns)	Minimizes reverse recovery loss in quasi-resonant and discontinuous conduction mode converters

Applications

LED Driver Power Stage	Offline Flyback SMPS
Use Scenario: Constant-current LED driver for commercial downlights operating from 90–265 VAC input. IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer to secondary winding. Use Value: 600 V rating provides 2× safety margin over peak line voltage; TO-220F insulation simplifies mechanical integration into compact LED modules.	Use Scenario: 12 W isolated AC-DC adapter for IoT sensors with no external cooling. IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback converter. Use Value: 2.5 Ω R_DS(on) limits conduction loss to <0.25 W at full load; 100% UIS ensures reliability during no-load or short-circuit events.
Industrial AC Input Protection	AC-DC Auxiliary Supply
Use Scenario: Input stage switch in 24 V DC industrial controller accepting 85–305 VAC mains. IC Role / Device Role / Timing Role: High-side switch enabling controlled inrush current limiting and hot-swap functionality. Use Value: 4 A I_D rating supports peak inrush currents up to 3.5 A; rugged gate oxide withstands repeated 100 V/µs dv/dt stress.	Use Scenario: Standby power supply for smart meter MCU and RTC, drawing <100 mW continuously. IC Role / Device Role / Timing Role: Low-duty-cycle primary switch powering auxiliary winding for 3.3 V rail. Use Value: Low Q_g reduces gate drive loss to <5 mW; TO-220F thermal resistance enables stable operation at 70 °C ambient without forced air.

LED Driver Power Stage

Offline Flyback SMPS

Use Scenario: Constant-current LED driver for commercial downlights operating from 90–265 VAC input.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer to secondary winding.

Use Value: 600 V rating provides 2× safety margin over peak line voltage; TO-220F insulation simplifies mechanical integration into compact LED modules.

Use Scenario: 12 W isolated AC-DC adapter for IoT sensors with no external cooling.

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

Use Value: 2.5 Ω R_DS(on) limits conduction loss to <0.25 W at full load; 100% UIS ensures reliability during no-load or short-circuit events.

Industrial AC Input Protection

AC-DC Auxiliary Supply

Use Scenario: Input stage switch in 24 V DC industrial controller accepting 85–305 VAC mains.

IC Role / Device Role / Timing Role: High-side switch enabling controlled inrush current limiting and hot-swap functionality.

Use Value: 4 A I_D rating supports peak inrush currents up to 3.5 A; rugged gate oxide withstands repeated 100 V/µs dv/dt stress.

Use Scenario: Standby power supply for smart meter MCU and RTC, drawing <100 mW continuously.

IC Role / Device Role / Timing Role: Low-duty-cycle primary switch powering auxiliary winding for 3.3 V rail.

Use Value: Low Q_g reduces gate drive loss to <5 mW; TO-220F thermal resistance enables stable operation at 70 °C ambient without forced air.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP4NK60ZFP	R_DS(on) = 2.7 Ω (typ), Q_g = 22 nC, TO-220FP package	Slightly higher conduction loss and gate drive requirement; identical insulation rating	Preferred where STMicroelectronics supply chain alignment is required
FQP4N60	R_DS(on) = 2.6 Ω (typ), Q_g = 20 nC, TO-220F package, no UIS rating	Lacks 100% UIS testing; requires additional snubber design for inductive loads	Lower-cost option for non-critical, low-transient applications

Compared with STP4NK60ZFP and FQP4N60, the AOTF4N60 delivers lower gate charge and guaranteed UIS performance-critical for compact, un-snubbed flyback and LED driver designs where layout space and reliability margins are constrained.

Availability

AOTF4N60 is available at Aetrix Electronics and suitable for offline AC-DC power supplies, LED drivers, and industrial auxiliary power supplies requiring stable component supply across multi-year production cycles.

Supply support for AOTF4N60 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 is a fabless power semiconductor company specializing in high-performance MOSFETs, IGBTs, and power ICs for computing, consumer, and industrial markets.

The AOTF4N60 belongs to Alpha & Omega's "AOTF" series of insulated-package high-voltage MOSFETs, engineered specifically for space-constrained, thermally demanding AC-DC conversion applications where electrical isolation and ruggedness are mandatory.

FAQ

What is the maximum junction temperature rating for AOTF4N60?

The AOTF4N60 has a maximum rated junction temperature (T_J) of 150 °C, validated per JEDEC JESD22-A108. This rating applies under specified thermal conditions with proper heatsinking and is critical for lifetime estimation in continuous-duty LED drivers and industrial power supplies using the AOTF4N60.

Does AOTF4N60 require a gate resistor for stability?

Yes, a gate resistor (typically 10–47 Ω) is recommended for the AOTF4N60 to dampen gate-source ringing caused by PCB trace inductance and driver output impedance. Without it, oscillation can exceed V_GS absolute maximum ratings and cause premature failure of the AOTF4N60 in high-dv/dt environments.

Can AOTF4N60 be used in synchronous rectification?

No, the AOTF4N60 is not optimized for synchronous rectification. It lacks the low R_DS(on) and fast body diode characteristics required for secondary-side switching. Its 2.5 Ω R_DS(on) and 120 ns t_rr make it unsuitable as a rectifier; the AOTF4N60 is intended exclusively for primary-side high-voltage switching.

What is the thermal resistance from junction to case (R_θJC) for AOTF4N60?

The AOTF4N60 has an R_θJC of 2.5 °C/W, measured from junction to the center of the insulated metal tab. This value enables accurate thermal modeling when the AOTF4N60 is mounted to a heatsink with known R_θCS and R_θSA, supporting reliable operation up to 4 A continuous current at 70 °C ambient.

Is AOTF4N60 lead-free and RoHS compliant?

Yes, the AOTF4N60 is manufactured in accordance with RoHS Directive 2011/65/EU and is lead-free. The device uses matte tin-plated leads and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life at ≤30 °C/85% RH before reflow soldering of the AOTF4N60.

AOTF4N60 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:: 4A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2.2Ohm @ 2A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 18 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 615 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 35W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F

AOTF4N60 FAQ

1.How can I place an order for AOTF4N60 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOTF4N60 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 AOTF4N60 reliable?

The price and inventory of AOTF4N60 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF4N60 is usually 5 days.

3.What payment methods are accepted for AOTF4N60?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF4N60 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOTF4N60?

AOTF4N60 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOTF4N60 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 AOTF4N60?

For technical support, including AOTF4N60 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF4N60 requirements.

6.How does Aetrix verify that AOTF4N60 is sourced from the original manufacturer or authorized distributors?

All AOTF4N60 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 AOTF4N60 meets industry standards.

7.What is the process for return or replacement of AOTF4N60?

All AOTF4N60 units undergo pre-shipment inspection (PSI). If there is an issue with AOTF4N60, 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 AOTF4N60 part is unused and in its original packaging.

Return procedure for AOTF4N60:

1.Submit a request within 90 days.

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

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