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Alpha & Omega Semiconductor Inc. AOTF240L
- Part No.:
- AOTF240L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
AOTF240L.pdf
- Description:
- MOSFET N-CH 40V 20A/85A TO220-3F
- Quantity:
- Payment:
- Shipping:
Inventory:344
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Product details
Overview
AOTF240L from Alpha & Omega Semiconductor is a 40V N-Channel Trench MOSFET in TO-220F package, rated for 85A continuous drain current at TC=100°C, with RDS(ON) < 2.9 mΩ at VGS=10V and < 3.7 mΩ at VGS=4.5V, optimized for high-frequency switching in DC-DC converters and motor drives.
For engineers reviewing the AOTF240L datasheet, pinout, applications, or equivalent options, key selection criteria include its 100% UIS-tested ruggedness, low Crss (68 pF), gate charge profile (Qg=49–72 nC at 10V), and thermal resistance RθJC = 3.6°C/W - critical for thermally constrained power stages.
Technical Context
The AOTF240L employs Trench MOSFET technology to minimize conduction and switching losses simultaneously, achieving an ultra-low RDS(ON) × Crss product. Its gate threshold voltage (1.0–2.2 V) ensures reliable turn-on with standard logic-level drivers.
It features fully characterized dynamic parameters including tD(on)=11 ns, tr=10 ns, tD(off)=38 ns, and tf=11 ns under standardized resistive-switching conditions (VGS=10V, VDS=20V, RL=1 Ω, RGEN=3 Ω), supporting hard-switched topologies up to several hundred kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum blocking voltage compatible with 36V nominal bus systems and 48V industrial power rails. |
| ID (TC=100°C) | 85 A - Continuous current capability at heatsink temperature of 100°C, enabling compact thermal design without forced air. |
| RDS(ON) @ VGS=10V | < 2.9 mΩ - Low conduction loss yielding ≤ 21 W conduction loss at 85 A, reducing heatsink requirements. |
| RDS(ON) @ VGS=4.5V | < 3.7 mΩ - Ensures robust operation with 5V gate drivers and partial PWM control schemes. |
| Crss | 68 pF - Low reverse transfer capacitance minimizes Miller-induced shoot-through risk and improves EMI performance. |
| Qg (10V) | 49–72 nC - Gate charge range informs driver sizing; enables efficient switching at 300–500 kHz with moderate gate drive strength. |
| EAS | 400 mJ - Avalanche energy rating supports unclamped inductive switching in motor control and relay driving. |
Pinout & Package
Package: TO-220F (full-pack, insulated flange). Flange is electrically isolated from drain; mounting screw does not require insulating hardware.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Drain (D) | Main current path (high-side or low-side switch node) | Connected to flange; carries full load current and must be thermally coupled to heatsink via insulated interface. |
| Source (S) | Reference node for gate drive and current sensing | Low-inductance return path; used for source-shunt sensing or bootstrap capacitor reference in high-side configurations. |
| Gate (G) | Control terminal for channel modulation | High-impedance input requiring controlled slew rate; gate resistance Rg = 0.5–1.5 Ω specified for stability and ringing suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 100% UIS tested | Guarantees single-pulse avalanche robustness up to 400 mJ, eliminating need for external clamping in inductive load switching. |
| 100% Rg tested | Ensures consistent gate drive timing and predictable switching behavior across production lots, critical for paralleling. |
| Trench process optimization | Delivers lowest RDS(ON) × Crss trade-off in its voltage class, reducing both conduction loss and switching loss simultaneously. |
| TO-220F insulated flange | Enables direct mounting to grounded heatsinks without isolation kits, simplifying mechanical assembly and improving thermal reliability. |
| Body diode Qrr = 58 nC | Low reverse recovery charge reduces commutation loss and EMI in synchronous rectification and half-bridge freewheeling. |
Applications
| DC-DC Buck Converter | Brushless DC Motor Inverter |
|---|---|
Use Scenario: High-efficiency 12–48V input buck regulator delivering up to 60A output for server VRMs and telecom power supplies. IC Role / Device Role / Timing Role: Synchronous high-side switch operating at 300–500 kHz with precise dead-time control. Use Value: RDS(ON) < 2.9 mΩ and Qg ≤ 72 nC enable >95% efficiency at full load while maintaining thermal margin on 2-layer PCBs. |
Use Scenario: 3-phase inverter stage for 400W–1kW BLDC motors in industrial pumps and HVAC blowers. IC Role / Device Role / Timing Role: Low-side switching element in 6-pack IGBT/MOSFET module replacement, driven by isolated gate drivers. Use Value: 100% UIS rating and 85A ID support peak motor currents up to 120A without derating, extending system lifetime under overload. |
| Industrial Power Supply Output Stage | Hot-Swap OR-ing Circuit |
Use Scenario: Secondary-side synchronous rectification in 48V/54V telecom rectifiers with strict thermal constraints. IC Role / Device Role / Timing Role: Synchronous rectifier controlled by adaptive gate timing to minimize body-diode conduction. Use Value: VSD = 0.65–1.0 V and Qrr = 58 nC reduce forward and recovery losses, improving light-load efficiency by ≥1.2% vs. Schottky alternatives. |
Use Scenario: Redundant 28V/48V power rail OR-ing in avionics and railway control cabinets. IC Role / Device Role / Timing Role: Back-to-back configured N-channel MOSFET for bidirectional fault isolation and zero-voltage turn-on. Use Value: Low RDS(ON) and fast switching (tr/tf ≤ 10 ns) minimize forward voltage drop and transition losses during hot-insertion events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-Channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRF1407PbF | RDS(ON) = 4.0 mΩ @ 10V; higher Crss (110 pF); TO-220 package (non-insulated flange) | Limited to lower-frequency (<100 kHz) applications due to higher switching loss; requires insulating hardware for grounded heatsinks. | Choose when cost sensitivity outweighs efficiency and thermal design simplicity. |
| STP85NF55-08 | RDS(ON) = 6.5 mΩ @ 10V; no UIS rating; TO-220 package; higher Qg (140 nC) | Not suitable for unclamped inductive loads; gate drive demands exceed typical 1A drivers; lower frequency ceiling (~150 kHz). | Acceptable only in non-critical, low-dV/dt linear or quasi-resonant applications with ample thermal margin. |
Compared with IRF1407PbF and STP85NF55-08, the AOTF240L delivers superior high-frequency efficiency via lower RDS(ON) × Crss, guaranteed UIS ruggedness, and TO-220F insulation - making it the preferred choice for space-constrained, thermally aggressive, and inductive-load-critical designs.
Availability
AOTF240L is available at Aetrix Electronics and suitable for DC-DC converters, BLDC motor inverters, and industrial power supply output stages requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AOTF240L 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 AOTF240L belongs to AOS's Trench Power MOSFET family, engineered specifically for high-efficiency, high-frequency switching in compact power conversion systems where thermal density and reliability are paramount.
FAQ
What is the maximum continuous drain current rating for AOTF240L at TC = 100°C?
The AOTF240L is rated for 85 A continuous drain current at case temperature TC = 100°C, as specified in the Absolute Maximum Ratings table. This value reflects steady-state thermal equilibrium with proper heatsinking and accounts for the device's RθJC = 3.6°C/W and maximum junction temperature of 175°C. The AOTF240L achieves this rating without derating in well-designed TO-220F-mounting configurations.
Does AOTF240L have an insulated flange, and how does that affect heatsink mounting?
Yes, the AOTF240L uses a TO-220F package with an electrically insulated flange. This allows direct mounting to a grounded metal heatsink without requiring insulating pads or shoulder washers, simplifying mechanical assembly and improving thermal contact reliability. The flange is internally isolated from the drain terminal, preserving circuit ground integrity while maximizing heat transfer efficiency in the AOTF240L.
Is AOTF240L suitable for synchronous rectification in 48V DC-DC converters?
Yes, the AOTF240L is well-suited for synchronous rectification in 48V-output DC-DC converters. Its low RDS(ON) (< 2.9 mΩ), low body diode forward voltage (VSD = 0.65–1.0 V), and low reverse recovery charge (Qrr = 58 nC) collectively reduce conduction and commutation losses. These characteristics make the AOTF240L effective in improving efficiency, especially at medium to high loads where synchronous FET conduction dominates losses.
What is the gate threshold voltage range for AOTF240L, and how does it impact logic-level drive compatibility?
The AOTF240L has a gate threshold voltage (VGS(th)) range of 1.0 V to 2.2 V at TJ = 25°C, ensuring reliable turn-on with standard 3.3V or 5V logic-level gate drivers. This low threshold, combined with RDS(ON) < 3.7 mΩ at VGS = 4.5V, confirms robust enhancement-mode operation and compatibility with microcontroller GPIOs and integrated gate drivers without level-shifting circuitry in the AOTF240L.
How is the avalanche ruggedness of AOTF240L verified, and what is its rated single-pulse energy?
The AOTF240L undergoes 100% Unclamped Inductive Switching (UIS) testing per JEDEC standards, guaranteeing minimum single-pulse avalanche energy (EAS) of 400 mJ at TJ = 25°C. This rating is validated using standardized test circuits with L = 0.1 mH and is documented in the datasheet's Absolute Maximum Ratings table - confirming the AOTF240L's suitability for inductive load switching without external snubbers.
AOTF240L 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):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 20A (Ta), 85A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 2.9mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.2V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 72 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 3510 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 1.9W (Ta), 41W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220F
AOTF240L FAQ
1.How can I place an order for AOTF240L through Aetrix?
Please submit a Request for Quotation (RFQ) for AOTF240L 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 AOTF240L reliable?
The price and inventory of AOTF240L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF240L is usually 5 days.
3.What payment methods are accepted for AOTF240L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF240L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOTF240L?
AOTF240L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOTF240L 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 AOTF240L?
For technical support, including AOTF240L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF240L requirements.
6.How does Aetrix verify that AOTF240L is sourced from the original manufacturer or authorized distributors?
All AOTF240L 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 AOTF240L meets industry standards.
7.What is the process for return or replacement of AOTF240L?
All AOTF240L units undergo pre-shipment inspection (PSI). If there is an issue with AOTF240L, 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 AOTF240L part is unused and in its original packaging.
Return procedure for AOTF240L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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