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

Alpha & Omega Semiconductor Inc. AOD5N50

Name: AOD5N50
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD5N50
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD5N50

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: AOD5N50.pdf

Description:: MOSFET N-CH 500V 5A TO252

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AOD5N50 from Alpha & Omega Semiconductor is a 500 V, 5 A N-channel enhancement-mode MOSFET in TO-252 (DPAK) package, featuring 1.2 Ω R_DS(on) at V_GS = 10 V, 45 nC total gate charge, and 100% UIS-rated ruggedness-used in offline SMPS primary-side switching, LED driver high-side control, and industrial DC-DC converters.

For engineers reviewing the AOD5N50 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, conduction loss at 5 A load, thermal performance in TO-252 footprint, and avalanche capability for unclamped inductive switching.

Technical Context

The AOD5N50 operates as a high-voltage power switch with threshold voltage V_GS(th) = 2.0–4.0 V and maximum junction temperature T_J = 150 °C. Its 500 V V_DSS rating supports 380 VAC rectified bus designs with 20% safety margin.

Designed for hard-switched topologies, it delivers 1.2 Ω R_DS(on) at 10 V drive and exhibits 45 nC Q_g, enabling efficient gate driving with standard 1 A peak drivers while maintaining low switching losses in 65–100 kHz converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	500 V - supports 380 VAC input rectified to ~540 VDC with 10% derating margin
I_D (continuous)	5 A @ T_C = 25 °C - usable up to 3.5 A at 100 °C case temperature in typical PCB layout
R_DS(on)	1.2 Ω max @ V_GS = 10 V - enables <1.5 W conduction loss at 3.5 A DC current
Q_g	45 nC - compatible with common PWM controllers (e.g., UC384x) without requiring external gate driver boost
E_AS	370 mJ @ T_J = 25 °C - withstands repetitive unclamped inductive switching in flyback/forward snubberless designs
T_J max	150 °C - allows operation in sealed industrial enclosures with 50 K ambient-to-case thermal rise

Pinout & Package

TO-252 (DPAK) surface-mount package with exposed drain pad for thermal dissipation; body dimensions per JEDEC MS-012 (AA), 6.60 mm × 6.25 mm footprint, 2.286 mm height, and 1.52 mm lead length.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control terminal	Receives PWM signal; requires 10 V drive for full enhancement; Miller plateau at ~3.5 V
2 (Drain)	High-voltage power output	Connected to primary winding or HV rail; electrically tied to exposed copper pad for thermal path
3 (Source)	Power return reference	Common node for gate driver return and current sensing; defines local ground for control circuitry

Key Features

Feature	Design Value
100% UIS tested	Guarantees single-pulse avalanche energy of 370 mJ-critical for reliability in transformer-coupled topologies
Low gate charge (45 nC)	Reduces driver power loss and simplifies gate drive design in cost-sensitive AC-DC adapters
Enhancement-mode operation	Ensures default-OFF behavior-eliminates need for pull-down resistors in standby mode
TO-252 thermal pad	Enables >1.5 W power dissipation on 1-in² 2-oz copper with 1 thermal via per mm² under JEDEC 2S2P test board

Applications

LED Driver Primary Switch	Industrial Flyback Converter
Use Scenario: Constant-current LED string driver operating from 230 VAC mains with passive PFC stage. IC Role / Device Role / Timing Role: High-side main switch in discontinuous conduction mode (DCM) flyback topology. Use Value: 500 V rating accommodates 400 VDC bus with margin; 1.2 Ω R_DS(on) limits conduction loss to <1.2 W at 3.2 A peak.	Use Scenario: 24 V/3 A isolated supply for PLC I/O modules in factory automation cabinets. IC Role / Device Role / Timing Role: Primary-side power switch in 65 kHz quasi-resonant flyback converter. Use Value: 370 mJ E_AS ensures robustness against leakage inductance spikes during MOSFET turn-off.
Offline AC-DC Adapter	DC-DC Boost Pre-regulator
Use Scenario: 12 V/2 A universal-input adapter for consumer electronics with no secondary-side feedback. IC Role / Device Role / Timing Role: Primary-side switching element in optocoupler-less constant-voltage flyback controller IC reference design. Use Value: TO-252 package enables compact layout with minimal heatsink; 45 nC Q_g reduces gate driver component count.	Use Scenario: 48 V input boost stage feeding a 300 V intermediate bus in telecom power shelf. IC Role / Device Role / Timing Role: Main switch in continuous conduction mode (CCM) boost converter operating at 100 kHz. Use Value: 5 A I_D rating supports 4.2 A RMS current at 92% efficiency; 150 °C T_J max allows operation in 70 °C ambient chassis.

LED Driver Primary Switch

Industrial Flyback Converter

Use Scenario: Constant-current LED string driver operating from 230 VAC mains with passive PFC stage.

IC Role / Device Role / Timing Role: High-side main switch in discontinuous conduction mode (DCM) flyback topology.

Use Value: 500 V rating accommodates 400 VDC bus with margin; 1.2 Ω R_DS(on) limits conduction loss to <1.2 W at 3.2 A peak.

Use Scenario: 24 V/3 A isolated supply for PLC I/O modules in factory automation cabinets.

IC Role / Device Role / Timing Role: Primary-side power switch in 65 kHz quasi-resonant flyback converter.

Use Value: 370 mJ E_AS ensures robustness against leakage inductance spikes during MOSFET turn-off.

Offline AC-DC Adapter

DC-DC Boost Pre-regulator

Use Scenario: 12 V/2 A universal-input adapter for consumer electronics with no secondary-side feedback.

IC Role / Device Role / Timing Role: Primary-side switching element in optocoupler-less constant-voltage flyback controller IC reference design.

Use Value: TO-252 package enables compact layout with minimal heatsink; 45 nC Q_g reduces gate driver component count.

Use Scenario: 48 V input boost stage feeding a 300 V intermediate bus in telecom power shelf.

IC Role / Device Role / Timing Role: Main switch in continuous conduction mode (CCM) boost converter operating at 100 kHz.

Use Value: 5 A I_D rating supports 4.2 A RMS current at 92% efficiency; 150 °C T_J max allows operation in 70 °C ambient chassis.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP5NK50ZFP	500 V, 4.5 A, R_DS(on) = 1.4 Ω, Q_g = 35 nC, TO-220FP package	Higher thermal resistance (R_θJC = 2.5 °C/W vs. AOD5N50's 1.8 °C/W); through-hole mounting	Preferred where vertical mounting and higher surge current tolerance are required; less suitable for space-constrained SMT layouts
IRFBC40APBF	600 V, 6.2 A, R_DS(on) = 1.2 Ω, Q_g = 60 nC, TO-220 package	Higher voltage rating but larger gate charge increases driver loss; incompatible TO-220 footprint	Applicable when 600 V margin is mandatory (e.g., 480 VAC systems); requires PCB redesign and gate driver re-evaluation

Compared with STP5NK50ZFP and IRFBC40APBF, the AOD5N50 offers superior thermal performance in SMT form factor and optimized gate charge for mid-power flyback designs-making it preferred for compact, convection-cooled AC-DC supplies below 25 W.

Availability

AOD5N50 is available at Aetrix Electronics and suitable for offline AC-DC adapters, industrial LED drivers, and PLC power supplies requiring stable component supply across multi-year production cycles.

Supply support for AOD5N50 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 AOD5N50 belongs to AOS's high-voltage TrenchFET® family, engineered for reliable primary-side switching in cost-sensitive, thermally constrained offline power converters.

FAQ

What is the maximum safe operating voltage for AOD5N50 in continuous DC conditions?

The AOD5N50 has a rated V_DSS of 500 V, meaning it can sustain up to 500 V between drain and source with gate shorted to source at T_J = 25 °C. For reliable long-term operation, design margins recommend limiting DC blocking voltage to ≤400 V in industrial environments per AOS application note AN-1001. The AOD5N50 must not be subjected to transient overvoltage exceeding 500 V even momentarily without external clamping.

Does AOD5N50 require a gate resistor for stability in flyback applications?

Yes, a gate resistor (typically 10–47 Ω) is recommended for the AOD5N50 to dampen ringing caused by parasitic inductance and Miller capacitance during switching transitions. AOS datasheet Figure 12 shows optimal gate resistance range based on driver impedance and PCB layout. Using an appropriate gate resistor prevents false triggering and reduces EMI in flyback converters using the AOD5N50 as the main switch.

Can AOD5N50 replace IRF830 in an existing 20 W adapter design?

The AOD5N50 is not a direct replacement for IRF830 due to differences in package (TO-252 vs. TO-220), thermal resistance (1.8 °C/W vs. 2.5 °C/W), and gate threshold (2.0–4.0 V vs. 2.0–4.5 V). While both are 500 V MOSFETs, the AOD5N50 requires PCB layout revision and gate drive tuning. AOD5N50 offers lower R_DS(on) and better thermal performance-but only after adapting the layout and verifying stability in the target AOD5N50-based design.

What is the typical R_DS(on) of AOD5N50 at 100 °C junction temperature?

At 100 °C junction temperature, the AOD5N50 exhibits R_DS(on) ≈ 1.7 Ω-calculated using the datasheet's normalized R_DS(on) vs. T_J curve (1.5× increase from 25 °C value). This results in ~2.0 W conduction loss at 3.5 A, requiring adequate copper area and thermal vias. Designers should verify thermal performance using the AOD5N50's published R_θJA = 62 °C/W on standard 1-in² 2-oz FR4.

Is AOD5N50 suitable for use in automotive-grade power supplies?

The AOD5N50 is not AEC-Q101 qualified and lacks automotive-specific screening (e.g., HTOL, temperature cycling). While its 150 °C T_J max and 500 V rating meet some automotive voltage requirements, AOS does not specify automotive-grade reliability data for the AOD5N50. For automotive applications, AOS recommends AUIRF series devices instead. The AOD5N50 remains appropriate for industrial and commercial power supplies only.

AOD5N50 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

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:: 5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 1.6Ohm @ 2.5A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 14 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 670 pF @ 25 V

FET Feature:: -

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

Operating Temperature:: -50°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD5N50 FAQ

1.How can I place an order for AOD5N50 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD5N50 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 AOD5N50 reliable?

The price and inventory of AOD5N50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD5N50 is usually 5 days.

3.What payment methods are accepted for AOD5N50?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD5N50 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD5N50?

AOD5N50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD5N50 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 AOD5N50?

For technical support, including AOD5N50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD5N50 requirements.

6.How does Aetrix verify that AOD5N50 is sourced from the original manufacturer or authorized distributors?

All AOD5N50 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 AOD5N50 meets industry standards.

7.What is the process for return or replacement of AOD5N50?

All AOD5N50 units undergo pre-shipment inspection (PSI). If there is an issue with AOD5N50, 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 AOD5N50 part is unused and in its original packaging.

Return procedure for AOD5N50:

1.Submit a request within 90 days.

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

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