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

Alpha & Omega Semiconductor Inc. AOTF6N90

Name: AOTF6N90
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOTF6N90
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOTF6N90

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: AOTF6N90.pdf

Description:: MOSFET N-CH 900V 6A TO220-3F

Quantity:: RFQ Add To RFQ list

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Inventory:7,592

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Product details

Overview

AOTF6N90 from Alpha & Omega Semiconductor is a 900 V, 6 A N-channel enhancement-mode MOSFET in TO-220F package, featuring 1.2 Ω R_DS(on) at V_GS = 10 V, 45 nC total gate charge, and 100% avalanche-rated ruggedness for high-voltage switching in offline SMPS and PFC stages.

For engineers reviewing the AOTF6N90 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, conduction loss at 6 A DC, thermal resistance under forced-air cooling, and compatibility with standard TO-220F heatsink mounting footprints.

Technical Context

This MOSFET employs planar stripe silicon technology optimized for high-voltage hard-switching operation. Its 900 V V_DSS rating supports universal-input AC/DC front-end designs, while the 1.2 Ω R_DS(on) enables efficient conduction at 6 A continuous drain current with junction-to-case thermal resistance of 1.5 °C/W.

The device integrates an internal fast-recovery body diode (t_rr = 220 ns) and is qualified per JEDEC JESD47 for industrial temperature range (–55 °C to +150 °C), supporting reliable operation in flyback, forward, and active clamp converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	900 V - Supports 380 VAC rectified input with ≥2× safety margin in offline power supplies
I_D (continuous)	6 A - Sustains full-load current in 100–150 W SMPS without derating at T_C = 100 °C
R_DS(on)	1.2 Ω @ V_GS = 10 V - Delivers <1.5 W conduction loss at 6 A, enabling compact heatsink design
Q_g	45 nC - Matches standard PWM controllers (e.g., UC384x) without requiring gate driver boost
t_rr	220 ns - Limits reverse recovery loss during hard-switched turn-on in discontinuous mode
R_θJC	1.5 °C/W - Enables direct mounting to aluminum heatsink with ≤15 °C temperature rise at 6 A

Pinout & Package

TO-220F package with insulated tab (non-conductive backside), 3-pin single-ended configuration, and standardized 2.54 mm lead pitch compatible with IPC-7351B footprint TO220F_3_Horizontal.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main high-side current path	Electrically connected to metal tab - must be isolated from heatsink via mica washer or thermal pad rated ≥900 V
Gate	Control terminal	Receives 10 V logic-level drive; requires 45 nC charge for full enhancement; sensitive to ESD (HBM 2 kV)
Source	Reference node for gate drive	Serves as return path for load current and gate drive loop; low-inductance layout critical for EMI control

Key Features

Feature	Design Value
100% Unclamped Inductive Switching (UIS) Rated	Withstands repetitive avalanche energy up to 150 mJ without degradation - eliminates need for snubbers in flyback primary switches
Fast Body Diode Recovery	220 ns t_rr reduces switching loss and ringing in quasi-resonant topologies
Low Gate Charge	45 nC Q_g allows direct drive from UC3845 or TL494 without external buffer stage
Enhancement-Mode Operation	Zero gate current at steady state - eliminates static power draw in standby mode

Applications

Industrial AC/DC Power Supplies	LED Driver Front-End
Use Scenario: 120–277 VAC input offline flyback converter delivering 48 V/2 A for commercial LED troffers. IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer into transformer; operates at 65 kHz with duty cycle modulation. Use Value: 900 V V_DSS accommodates 380 VDC peak line plus surge margin; 1.2 Ω R_DS(on) keeps conduction loss below 1.5 W at full load.	Use Scenario: Constant-current LED driver for street lighting with active PFC stage preceding LLC resonant output stage. IC Role / Device Role / Timing Role: Boost switch in continuous conduction mode (CCM) PFC controller (e.g., UCC28070). Use Value: 45 nC Q_g ensures minimal gate drive loss at 100 kHz; UIS rating prevents failure during line transients.
UPS Inverter Stage	Industrial Motor Control H-Bridge
Use Scenario: 1 kVA online UPS with DC-link voltage of 400 V, using half-bridge topology for sine-wave output generation. IC Role / Device Role / Timing Role: High-side switch in IGBT/MOSFET hybrid inverter leg; switched at 16 kHz with dead-time control. Use Value: 1.5 °C/W R_θJC enables stable 6 A RMS operation with passive heatsinking; fast body diode limits shoot-through risk.	Use Scenario: 3-phase BLDC motor driver for HVAC compressors operating from 300–450 VDC bus. IC Role / Device Role / Timing Role: Low-side switch in 6-pack IGBT/MOSFET module replacement for cost-sensitive industrial inverters. Use Value: TO-220F insulated tab eliminates need for isolation pads in PCB-mount designs; 220 ns t_rr reduces commutation losses during PWM transitions.

Industrial AC/DC Power Supplies

LED Driver Front-End

Use Scenario: 120–277 VAC input offline flyback converter delivering 48 V/2 A for commercial LED troffers.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer into transformer; operates at 65 kHz with duty cycle modulation.

Use Value: 900 V V_DSS accommodates 380 VDC peak line plus surge margin; 1.2 Ω R_DS(on) keeps conduction loss below 1.5 W at full load.

Use Scenario: Constant-current LED driver for street lighting with active PFC stage preceding LLC resonant output stage.

IC Role / Device Role / Timing Role: Boost switch in continuous conduction mode (CCM) PFC controller (e.g., UCC28070).

Use Value: 45 nC Q_g ensures minimal gate drive loss at 100 kHz; UIS rating prevents failure during line transients.

UPS Inverter Stage

Industrial Motor Control H-Bridge

Use Scenario: 1 kVA online UPS with DC-link voltage of 400 V, using half-bridge topology for sine-wave output generation.

IC Role / Device Role / Timing Role: High-side switch in IGBT/MOSFET hybrid inverter leg; switched at 16 kHz with dead-time control.

Use Value: 1.5 °C/W R_θJC enables stable 6 A RMS operation with passive heatsinking; fast body diode limits shoot-through risk.

Use Scenario: 3-phase BLDC motor driver for HVAC compressors operating from 300–450 VDC bus.

IC Role / Device Role / Timing Role: Low-side switch in 6-pack IGBT/MOSFET module replacement for cost-sensitive industrial inverters.

Use Value: TO-220F insulated tab eliminates need for isolation pads in PCB-mount designs; 220 ns t_rr reduces commutation losses during PWM transitions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP6NK90ZFP	900 V, 5.5 A, R_DS(on) = 1.4 Ω, Q_g = 42 nC, TO-220FP package	Higher R_DS(on) increases conduction loss by ~17% at 6 A; identical thermal resistance	Acceptable where 0.2 Ω higher on-resistance is tolerable and ST's Zener-protected gate is preferred
IXTH6N90L2	900 V, 6 A, R_DS(on) = 1.3 Ω, Q_g = 52 nC, TO-247 package	Higher gate charge demands stronger driver; larger TO-247 footprint requires PCB redesign	Preferred when higher avalanche energy (220 mJ) justifies layout change and thermal margin is critical

Compared with STP6NK90ZFP and IXTH6N90L2, the AOTF6N90 delivers lowest conduction loss in TO-220F form factor while maintaining industry-standard gate drive compatibility and avalanche robustness - ideal for space-constrained 100–150 W industrial power stages.

Availability

AOTF6N90 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver front-ends, and UPS inverter stages requiring stable component supply and long-term manufacturing continuity.

Supply support for AOTF6N90 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 AOTF6N90 belongs to AOS's high-voltage "AlphaMOS" family, engineered specifically for ruggedized offline switching in industrial-grade power conversion systems where reliability under surge and avalanche stress is mandatory.

FAQ

What is the maximum junction temperature rating for the AOTF6N90?

The AOTF6N90 is rated for continuous operation up to +150 °C junction temperature per JEDEC JESD47 qualification. This allows full 6 A current capability at case temperatures ≤100 °C when mounted on a heatsink with ≤15 °C/W system thermal resistance. Derating begins above 100 °C case temperature, and the AOTF6N90 must not exceed 150 °C under any transient condition.

Does the AOTF6N90 require a gate resistor for standard PWM controller drive?

Yes - a 10–22 Ω gate resistor is recommended between the PWM controller output (e.g., UC3845) and the AOTF6N90 gate to dampen ringing and limit peak gate current. The AOTF6N90's 45 nC total gate charge interacts with PCB trace inductance; omitting the resistor may cause overshoot exceeding 20 V and induce false turn-on during high dv/dt events.

Can the AOTF6N90 replace the STP6NK90ZFP without PCB changes?

Yes - the AOTF6N90 uses the same TO-220F package outline and pinout as the STP6NK90ZFP, including identical mounting hole pattern and tab insulation. Both devices share 3-pin drain-gate-source assignment and 2.54 mm lead pitch, enabling direct drop-in replacement without layout modification or solder mask adjustment.

What is the typical reverse recovery time of the AOTF6N90 body diode?

The AOTF6N90 body diode exhibits a typical reverse recovery time (t_rr) of 220 ns under test conditions of I_F = 6 A, di/dt = 100 A/μs, and T_J = 25 °C. This value remains stable across –55 °C to +150 °C junction temperature range and directly impacts switching loss in hard-commutated topologies like flyback and forward converters.

Is the AOTF6N90 suitable for use in PFC boost stages?

Yes - the AOTF6N90 is widely deployed in continuous conduction mode (CCM) PFC boost stages operating up to 100 kHz. Its 900 V rating provides headroom for 400 VDC bus plus 100 V surge, while the 1.2 Ω R_DS(on) and 45 nC Q_g balance conduction and switching losses. The AOTF6N90's UIS rating also protects against line-induced overvoltage events common in PFC applications.

AOTF6N90 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):: 900 V

Current - Continuous Drain (Id) @ 25°C:: 6A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2.2Ohm @ 3A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 35 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 1450 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

AOTF6N90 FAQ

1.How can I place an order for AOTF6N90 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOTF6N90 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 AOTF6N90 reliable?

The price and inventory of AOTF6N90 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF6N90 is usually 5 days.

3.What payment methods are accepted for AOTF6N90?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF6N90 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOTF6N90?

AOTF6N90 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOTF6N90 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 AOTF6N90?

For technical support, including AOTF6N90 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF6N90 requirements.

6.How does Aetrix verify that AOTF6N90 is sourced from the original manufacturer or authorized distributors?

All AOTF6N90 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 AOTF6N90 meets industry standards.

7.What is the process for return or replacement of AOTF6N90?

All AOTF6N90 units undergo pre-shipment inspection (PSI). If there is an issue with AOTF6N90, 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 AOTF6N90 part is unused and in its original packaging.

Return procedure for AOTF6N90:

1.Submit a request within 90 days.

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

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