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

Alpha & Omega Semiconductor Inc. AOTF16N50

Name: AOTF16N50
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOTF16N50
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOTF16N50

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: AOTF16N50.pdf

Description:: MOSFET N-CH 500V 16A TO220-3F

Quantity:: RFQ Add To RFQ list

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Inventory:2,953

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Product details

Overview

AOTF16N50 from Alpha & Omega Semiconductor is a 500 V, 16 A N-channel enhancement-mode MOSFET in TO-220F package, featuring 0.32 Ω typical R_DS(on) at V_GS = 10 V, 45 nC total gate charge, and 100% avalanche-rated ruggedness for industrial power switching applications.

For engineers reviewing the AOTF16N50 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, conduction loss at 16 A DC, thermal performance in forced-air or heatsink-mounted configurations, and compatibility with standard gate drivers in offline SMPS and motor control designs.

Technical Context

The AOTF16N50 employs planar VDMOS technology with optimized cell pitch and field oxide termination to achieve stable 500 V blocking capability while maintaining low on-resistance. Its gate threshold voltage (2–4 V) ensures reliable turn-on with industry-standard 10 V gate drive.

Designed for hard-switched topologies, the device supports repetitive avalanche energy of 175 mJ at T_J = 25 °C and exhibits positive temperature coefficient for R_DS(on), enabling inherent current sharing in parallel configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	500 V - supports 380 VAC input rectified systems with ≥20% safety margin
I_D (continuous)	16 A @ T_C = 25 °C - rated for sustained conduction in 100–200 W power stages
R_DS(on) (typ)	0.32 Ω @ V_GS = 10 V - yields ≤82 W conduction loss at 16 A, requiring heatsink
Q_g	45 nC - determines gate driver current requirement (~1–2 A peak for 20–50 ns switching)
E_AS	175 mJ - enables robust operation under inductive load switching without snubber
Package	TO-220F - isolated tab allows direct mounting to heatsink without insulator, 1.5 K/W junction-to-case

Pinout & Package

TO-220F package with electrically isolated metal tab (drain-connected), three leads: Gate (pin 1), Drain (pin 2, tab), Source (pin 3). Tab isolation enables safe mounting to grounded heatsinks.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (left)	Gate	Control terminal; requires 10 V drive for full enhancement; Miller plateau at ~3.5 V
Pin 2 (center)	Drain (tab)	Main high-side current path; tab is drain-connected and electrically isolated from PCB
Pin 3 (right)	Source	Reference node for gate drive; connects to power ground or low-side switch source

Key Features

Feature	Design Value
100% UIS tested	Guarantees single-pulse avalanche capability up to 175 mJ without derating
Low gate charge	Reduces switching losses and eases gate driver selection in 65–100 kHz SMPS
Enhancement-mode	Normally-off operation eliminates need for pull-down resistors in standby
RoHS-compliant	Meets lead-free soldering requirements for reflow profiles up to 260 °C peak

Applications

Industrial AC-DC Power Supplies	Brushless DC Motor Controllers
Use Scenario: 300–500 W offline flyback or LLC resonant converter powering PLC I/O modules. IC Role / Device Role / Timing Role: Primary-side high-voltage switch handling rectified 380 VDC bus. Use Value: 500 V rating provides margin against line surges; 0.32 Ω R_DS(on) limits conduction loss to <10 W at full load.	Use Scenario: 3-phase inverter stage driving 200–400 W BLDC fans or pumps in HVAC systems. IC Role / Device Role / Timing Role: Low-side switching element in 6-step commutation with PWM frequency up to 20 kHz. Use Value: Avalanche ruggedness prevents failure during phase-current transients; TO-220F isolation simplifies heatsinking in compact enclosures.
LED Streetlight Drivers	DC-DC Boost Converters
Use Scenario: Constant-current boost LED driver operating from 12–48 VDC battery input in solar-powered lighting. IC Role / Device Role / Timing Role: Main switching transistor in continuous-conduction-mode (CCM) boost topology. Use Value: Low Q_g enables efficient 100 kHz switching; 16 A rating supports >10 A LED string current with headroom.	Use Scenario: 24 V to 48 V telecom boost converter delivering 10 A output in distributed power architecture. IC Role / Device Role / Timing Role: High-efficiency power switch in synchronous or diode-rectified boost stage. Use Value: Positive R_DS(on) tempco allows stable parallel operation; 500 V rating accommodates 48 V input with transient overvoltage protection.

Industrial AC-DC Power Supplies

Brushless DC Motor Controllers

Use Scenario: 300–500 W offline flyback or LLC resonant converter powering PLC I/O modules.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch handling rectified 380 VDC bus.

Use Value: 500 V rating provides margin against line surges; 0.32 Ω R_DS(on) limits conduction loss to <10 W at full load.

Use Scenario: 3-phase inverter stage driving 200–400 W BLDC fans or pumps in HVAC systems.

IC Role / Device Role / Timing Role: Low-side switching element in 6-step commutation with PWM frequency up to 20 kHz.

Use Value: Avalanche ruggedness prevents failure during phase-current transients; TO-220F isolation simplifies heatsinking in compact enclosures.

LED Streetlight Drivers

DC-DC Boost Converters

Use Scenario: Constant-current boost LED driver operating from 12–48 VDC battery input in solar-powered lighting.

IC Role / Device Role / Timing Role: Main switching transistor in continuous-conduction-mode (CCM) boost topology.

Use Value: Low Q_g enables efficient 100 kHz switching; 16 A rating supports >10 A LED string current with headroom.

Use Scenario: 24 V to 48 V telecom boost converter delivering 10 A output in distributed power architecture.

IC Role / Device Role / Timing Role: High-efficiency power switch in synchronous or diode-rectified boost stage.

Use Value: Positive R_DS(on) tempco allows stable parallel operation; 500 V rating accommodates 48 V input with transient overvoltage protection.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP16NF50	R_DS(on) = 0.36 Ω (typ), Q_g = 42 nC, same TO-220FP package	Slightly higher conduction loss; identical avalanche rating	Preferred where gate drive current budget is tighter but thermal margin permits 0.04 Ω higher R_DS(on)
FQP16N50	R_DS(on) = 0.35 Ω (typ), Q_g = 52 nC, TO-220 package (non-isolated tab)	Higher switching loss due to +15% Q_g; requires insulating pad for heatsink mounting	Selected when cost sensitivity outweighs gate drive complexity and thermal interface overhead

Compared with STP16NF50 and FQP16N50, the AOTF16N50 delivers lowest conduction loss among the three while maintaining competitive switching performance and eliminating insulator requirements via its TO-220F isolated tab-critical for thermally constrained industrial enclosures.

Availability

AOTF16N50 is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, brushless DC motor controllers, and LED streetlight drivers requiring stable component supply across multi-year production cycles.

Supply support for AOTF16N50 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, and industrial markets.

The AOTF16N50 belongs to AOS's "AlphaMOS" high-voltage discrete family, engineered for ruggedness and efficiency in offline power conversion and motor drive applications where reliability under surge and thermal stress is critical.

FAQ

What is the maximum junction temperature rating for the AOTF16N50?

The AOTF16N50 has a maximum rated junction temperature of 150 °C. This allows operation in ambient environments up to 85 °C when mounted on a properly sized heatsink with thermal resistance ≤1.2 K/W. Derating curves in the official AOS datasheet define safe operating area limits above 25 °C case temperature, and the AOTF16N50 must be operated within those boundaries to ensure long-term reliability.

Does the AOTF16N50 require a gate resistor, and what value is recommended?

Yes, the AOTF16N50 requires an external gate resistor to control switching speed and suppress ringing. A value between 10 Ω and 47 Ω is typically used depending on switching frequency and EMI constraints. For 65–100 kHz SMPS designs, 22 Ω provides optimal trade-off between switching loss and gate drive stability. The AOTF16N50's 45 nC gate charge makes it sensitive to excessive dV/dt without proper gate resistance.

Can the AOTF16N50 be used in parallel configurations?

Yes, the AOTF16N50 can be paralleled due to its positive temperature coefficient of R_DS(on), which promotes current sharing as temperature rises. Successful parallel operation requires matched layout, individual gate resistors, and symmetrical source inductance. The AOTF16N50's 100% UIS testing ensures each unit withstands transient imbalances during startup or fault conditions.

Is the AOTF16N50 suitable for use in automotive applications?

No, the AOTF16N50 is not qualified to AEC-Q101 and is not intended for automotive applications. It is specified for industrial and commercial use only, with qualification per JEDEC standards. Automotive-grade alternatives require extended temperature range (−40 to 175 °C), enhanced ESD robustness, and PPAP documentation-none of which apply to the AOTF16N50.

What is the drain-source diode's reverse recovery performance in the AOTF16N50?

The intrinsic body diode of the AOTF16N50 has t_rr = 220 ns and Q_rr = 1.9 µC at I_F = 8 A, V_DD = 200 V, and di/dt = 100 A/µs. These values indicate moderate reverse recovery behavior-acceptable in hard-switched converters with snubbers but not recommended for high-frequency synchronous rectification without external Schottky clamping. The AOTF16N50's diode is not optimized for fast recovery.

AOTF16N50 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):: 500 V

Current - Continuous Drain (Id) @ 25°C:: 16A (Tc)

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

Rds On (Max) @ Id, Vgs:: 370mOhm @ 8A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 51 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 2297 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

AOTF16N50 FAQ

1.How can I place an order for AOTF16N50 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOTF16N50 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 AOTF16N50 reliable?

The price and inventory of AOTF16N50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF16N50 is usually 5 days.

3.What payment methods are accepted for AOTF16N50?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF16N50 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOTF16N50?

AOTF16N50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOTF16N50 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 AOTF16N50?

For technical support, including AOTF16N50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF16N50 requirements.

6.How does Aetrix verify that AOTF16N50 is sourced from the original manufacturer or authorized distributors?

All AOTF16N50 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 AOTF16N50 meets industry standards.

7.What is the process for return or replacement of AOTF16N50?

All AOTF16N50 units undergo pre-shipment inspection (PSI). If there is an issue with AOTF16N50, 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 AOTF16N50 part is unused and in its original packaging.

Return procedure for AOTF16N50:

1.Submit a request within 90 days.

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

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