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

Alpha & Omega Semiconductor Inc. AOB12N65L

Name: AOB12N65L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOB12N65L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOB12N65L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: AOB12N65L.pdf

Description:: MOSFET N-CH 650V 12A TO263

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Product details

Overview

AOB12N65L from Alpha & Omega Semiconductor is a 650V, 12A N-channel enhancement-mode MOSFET in TO-263 (D2PAK) green package, featuring R_DS(on) ≤ 0.72 Ω at V_GS = 10 V, 100% UIS tested, and optimized for offline AC-DC power supplies including PFC and main switch stages.

For engineers reviewing the AOB12N65L datasheet, pinout, applications, or equivalent options, this device supports high-voltage switching with guaranteed avalanche ruggedness, low gate charge (Q_g = 32–48 nC), and robust dv/dt immunity (30 V/ns), critical for flyback, LLC resonant, and industrial SMPS designs.

Technical Context

The AOB12N65L uses Alpha & Omega's high-voltage trench MOSFET process to deliver low R_DS(on) (0.57–0.72 Ω), low C_iss (1430–2150 pF), and low C_rss (9–18 pF), enabling high-efficiency hard-switched topologies. Its 150°C maximum junction temperature and 3.1°C/W R_θJC support thermally constrained PCB layouts.

It features a body diode with t_rr = 300–450 ns and Q_rr = 6–9 μC at I_F = 12 A, dI/dt = 100 A/μs, V_DS = 100 V - suitable for synchronous rectification and freewheeling roles where reverse recovery behavior impacts EMI and losses.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	650 V - rated for universal-input offline applications up to 400 V DC bus with margin.
I_D (T_C = 25°C)	12 A - continuous drain current limited by thermal resistance and junction temperature (T_J ≤ 150°C).
R_DS(on) (V_GS = 10 V)	≤ 0.72 Ω - enables <1.0 W conduction loss at 12 A, supporting compact heatsink design.
Q_g	32–48 nC - low total gate charge reduces driver power and switching loss in high-frequency operation.
E_AS	750 mJ - single-pulse avalanche energy rating confirms ruggedness under transient overvoltage conditions.
R_θJC	3.1 °C/W - junction-to-case thermal resistance enables direct mounting to heatsink without thermal pad compromise.
dv/dt ruggedness	30 V/ns - validated immunity to parasitic turn-on in high-dV/dt environments like bridge-leg configurations.

Pinout & Package

AOB12N65L is housed in a surface-mount TO-263 (D2PAK) green package with G-D-S pinout (top view). The exposed drain pad provides low-inductance, high-current path and thermal conduction to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control terminal	Receives PWM signal; requires 10 V drive for full enhancement; R_g = 1.7–5.3 Ω internal gate resistance affects switching speed.
D (Drain)	High-side power output	Connected to primary winding or HV rail; electrically tied to exposed metal tab for thermal and current path.
S (Source)	Reference node	Return path for load current; used as common reference for gate drive and current sensing in low-side configurations.

Key Features

Feature	Design Value
100% UIS tested	Guarantees avalanche survival under unclamped inductive switching stress without derating.
Low C_rss (9–18 pF)	Reduces Miller-induced false turn-on and improves noise immunity in high-dV/dt circuits.
Body diode t_rr = 300–450 ns	Enables predictable commutation in quasi-resonant and ZVS converters with minimal voltage overshoot.
Green RoHS-compliant packaging	Meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for reflow compatibility.
TO-263 surface-mount form	Supports automated assembly and higher power density vs. through-hole alternatives like TO-220F.

Applications

Server PSU Primary Switch	Industrial Flyback Converter
Use Scenario: High-efficiency 80 PLUS Titanium server power supply operating at 100–500 kHz with active clamp or LLC topology. IC Role / Device Role / Timing Role: Main high-side switching device in primary-side power stage handling 650 V DC link and 12 A peak current. Use Value: Low R_DS(on) and Q_g reduce conduction and switching losses; 750 mJ E_AS ensures reliability during startup surges and fault transients.	Use Scenario: Isolated 24–48 V output flyback converter for industrial PLC I/O modules with wide input range (85–265 V AC). IC Role / Device Role / Timing Role: Primary-side power switch controlling energy transfer across transformer with 650 V blocking capability. Use Value: 30 V/ns dv/dt ruggedness prevents spurious turn-on during transformer leakage spikes; TO-263 footprint simplifies thermal management on dense control boards.
PFC Boost Switch	Motor Drive Inverter Stage
Use Scenario: Continuous conduction mode (CCM) boost PFC front-end in commercial lighting ballasts and HVAC controllers. IC Role / Device Role / Timing Role: Fast-switching boost switch operating at 65–133 kHz with 12 A average current capability. Use Value: Low C_iss/C_rss ratio improves efficiency and EMI profile; 100% UIS test ensures robustness against line surge events.	Use Scenario: Half-bridge leg in 3-phase inverter for 0.5–2 kW brushless DC motor drives in factory automation equipment. IC Role / Device Role / Timing Role: Upper-leg switching element in inverter phase leg, requiring fast body diode recovery and high avalanche tolerance. Use Value: Body diode Q_rr = 6–9 μC and t_rr = 300–450 ns minimize cross-conduction loss and voltage spike during commutation.

Server PSU Primary Switch

Industrial Flyback Converter

Use Scenario: High-efficiency 80 PLUS Titanium server power supply operating at 100–500 kHz with active clamp or LLC topology.

IC Role / Device Role / Timing Role: Main high-side switching device in primary-side power stage handling 650 V DC link and 12 A peak current.

Use Value: Low R_DS(on) and Q_g reduce conduction and switching losses; 750 mJ E_AS ensures reliability during startup surges and fault transients.

Use Scenario: Isolated 24–48 V output flyback converter for industrial PLC I/O modules with wide input range (85–265 V AC).

IC Role / Device Role / Timing Role: Primary-side power switch controlling energy transfer across transformer with 650 V blocking capability.

Use Value: 30 V/ns dv/dt ruggedness prevents spurious turn-on during transformer leakage spikes; TO-263 footprint simplifies thermal management on dense control boards.

PFC Boost Switch

Motor Drive Inverter Stage

Use Scenario: Continuous conduction mode (CCM) boost PFC front-end in commercial lighting ballasts and HVAC controllers.

IC Role / Device Role / Timing Role: Fast-switching boost switch operating at 65–133 kHz with 12 A average current capability.

Use Value: Low C_iss/C_rss ratio improves efficiency and EMI profile; 100% UIS test ensures robustness against line surge events.

Use Scenario: Half-bridge leg in 3-phase inverter for 0.5–2 kW brushless DC motor drives in factory automation equipment.

IC Role / Device Role / Timing Role: Upper-leg switching element in inverter phase leg, requiring fast body diode recovery and high avalanche tolerance.

Use Value: Body diode Q_rr = 6–9 μC and t_rr = 300–450 ns minimize cross-conduction loss and voltage spike during commutation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP12N65M2	R_DS(on) = 0.75 Ω (typ), Q_g = 35 nC, TO-220 package, R_θJC = 1.0°C/W	Through-hole mounting; higher thermal resistance requires larger heatsink area for same power dissipation.	Preferred when legacy TO-220 layout exists and board-level thermal mass is available.
IPP65R190C7	R_DS(on) = 0.19 Ω (typ), 650 V, Superjunction, TO-220FP package, R_θJC = 1.2°C/W	Lower R_DS(on) but higher C_iss (1850 pF) and Q_g (52 nC); not UIS rated.	Selected for ultra-low conduction loss where switching frequency is low (<100 kHz) and avalanche stress is absent.

Compared with STP12N65M2 and IPP65R190C7, the AOB12N65L offers superior surface-mount integration, verified avalanche ruggedness, and balanced switching/conduction trade-offs ideal for modern high-density, high-reliability AC-DC systems.

Availability

AOB12N65L is available at Aetrix Electronics and suitable for server PSUs, industrial flyback converters, PFC boost stages, and motor drive inverters requiring stable component supply, long-term lifecycle assurance, and green-compliant packaging.

Supply support for AOB12N65L 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, industrial, and automotive markets.

The AOT/AOB/AOTF family targets high-voltage power conversion with emphasis on ruggedness, low loss, and manufacturability - specifically engineered for offline AC-DC, PFC, and DC-DC applications demanding reliability under real-world surge and thermal stress.

FAQ

What is the maximum junction temperature rating for the AOB12N65L?

The AOB12N65L has a maximum junction temperature (T_J) of 150°C, as specified in its Absolute Maximum Ratings table. This rating is used to calculate safe operating area limits and thermal derating curves. Operation beyond 150°C risks permanent degradation of the silicon die and bond wires. The AOB12N65L datasheet provides normalized R_DS(on) vs. temperature data confirming stable performance up to this limit.

Is the AOB12N65L suitable for use in a PFC boost circuit?

Yes, the AOB12N65L is explicitly designed for PFC boost applications. Its 650 V V_DS, 12 A I_D, low R_DS(on) (≤ 0.72 Ω), and low Q_g (32–48 nC) enable high efficiency in continuous conduction mode (CCM) boost converters. The device's 100% UIS testing and 750 mJ E_AS ensure reliability during line surges and startup transients commonly encountered in PFC stages.

Does the AOB12N65L have a fully rated body diode for freewheeling operation?

Yes, the AOB12N65L body diode is fully characterized and rated: I_S = 12 A continuous, I_SM = 48 A pulsed, t_rr = 300–450 ns, and Q_rr = 6–9 μC at I_F = 12 A, dI/dt = 100 A/μs. These parameters are measured and guaranteed per the datasheet, making it suitable for freewheeling in flyback, forward, and LLC topologies where body diode conduction occurs.

What is the gate threshold voltage range for the AOB12N65L?

The AOB12N65L has a gate threshold voltage (V_GS(th)) range of 3.0 V to 4.5 V at I_D = 250 μA and T_J = 25°C. This ensures reliable turn-on with standard 5 V or 10 V gate drivers while maintaining sufficient noise margin against false triggering. The typical value is 3.9 V, and the parameter is tested across temperature and production lots per the datasheet.

How does the AOB12N65L's thermal resistance compare to TO-220F variants in the same family?

The AOB12N65L has R_θJC = 3.1°C/W, higher than the AOTF12N65L (R_θJC = 2.5°C/W) and AOTF12N65 (R_θJC = 0.45°C/W), due to its TO-263 package construction and thermal path geometry. However, its surface-mount design allows broader PCB copper area for heat spreading, offsetting the higher R_θJC in well-designed layouts. The datasheet provides transient thermal impedance curves specific to the AOB12N65L.

AOB12N65L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 650 V

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

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

Rds On (Max) @ Id, Vgs:: 720mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 48 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 2150 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 278W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263 (D2PAK)

AOB12N65L FAQ

1.How can I place an order for AOB12N65L through Aetrix?

Please submit a Request for Quotation (RFQ) for AOB12N65L 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 AOB12N65L reliable?

The price and inventory of AOB12N65L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOB12N65L is usually 5 days.

3.What payment methods are accepted for AOB12N65L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOB12N65L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOB12N65L?

AOB12N65L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOB12N65L 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 AOB12N65L?

For technical support, including AOB12N65L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOB12N65L requirements.

6.How does Aetrix verify that AOB12N65L is sourced from the original manufacturer or authorized distributors?

All AOB12N65L 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 AOB12N65L meets industry standards.

7.What is the process for return or replacement of AOB12N65L?

All AOB12N65L units undergo pre-shipment inspection (PSI). If there is an issue with AOB12N65L, 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 AOB12N65L part is unused and in its original packaging.

Return procedure for AOB12N65L:

1.Submit a request within 90 days.

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

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