My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOT66518L
- Part No.:
- AOT66518L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3
- Datasheet:
-
AOT66518L.pdf
- Description:
- MOSFET N-CH 150V 30A/120A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:831
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOT66518L from Alpha & Omega Semiconductor is a 150V, 120A N-channel Trench Power MOSFET in TO-220 package, featuring RDS(ON) < 5 mΩ at VGS = 10 V and 100% UIS-tested ruggedness for industrial power supply and load-switching applications.
For engineers reviewing the AOT66518L datasheet, pinout, applications, or equivalent options, key selection criteria include its 175°C max junction temperature, low gate charge (Qg = 80–115 nC), robust SOA up to 10 ms, and verified avalanche energy rating (EAS = 375 mJ).
Technical Context
The AOT66518L employs AlphaSGT™ technology to achieve high current density with low conduction loss and wide safe operating area. Its RDS(ON) remains stable across VGS = 8–10 V (4.6–5.6 mΩ) and temperature (25–125°C), supporting reliable operation under thermal stress.
It delivers fast switching performance: tD(on) = 27 ns, tr = 20 ns, tD(off) = 49 ns, tf = 28 ns, with Ciss = 6460 pF and low Crss = 5 pF - enabling efficient hard-switching in high-frequency DC/DC converters and motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 150 V - supports 48 V and 54 V bus systems with margin for transients and ringing |
| ID (TC = 25°C) | 120 A - enables high-current load switching without parallel devices in TO-220 |
| RDS(ON) (VGS = 10 V) | < 5 mΩ - reduces conduction loss to ≤ 72 W at 120 A, easing thermal design |
| Qg (10 V) | 80–115 nC - determines gate drive power requirement and switching speed trade-off |
| EAS | 375 mJ - ensures survivability during unclamped inductive turn-off events in relay/motor control |
| TJ(max) | 175 °C - allows sustained operation in high-ambient industrial environments |
| RθJC | 0.4 °C/W - defines minimum heatsink requirement for 150 W continuous dissipation |
Pinout & Package
Package: TO-220 (3-lead, through-hole, isolated tab). Tab is Drain-connected. Standard mounting with insulating washer recommended for non-isolated heatsinks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G (Gate) | Control input | Receives 10 V logic-level drive; Rg = 1.1–3.5 Ω affects switching speed and EMI |
| D (Drain) | High-side switch node | Connected to internal tab; must be electrically isolated from heatsink unless system ground-referenced |
| S (Source) | Power return / reference | Common return path for load current and gate driver; low-inductance layout critical for dV/dt immunity |
Key Features
| Feature | Design Value |
|---|---|
| AlphaSGT™ Trench Technology | Enables 150 V rating with sub-5 mΩ RDS(ON), improving power density over planar MOSFETs |
| 100% UIS Tested | Guarantees single-pulse avalanche capability up to 375 mJ - no screening failures in production |
| 100% Rg Tested | Ensures consistent gate drive timing and predictable switching behavior across all units |
| RoHS & Halogen-Free | Complies with IPC-1752A material declaration requirements for industrial and telecom end equipment |
| Wide SOA (10 ms) | Supports linear-mode operation and inrush current handling without secondary breakdown |
Applications
| Industrial Power Supply | Telecom DC-DC Converter |
|---|---|
|
Use Scenario: Primary-side synchronous rectification and OR-ing in 48 V intermediate bus supplies. IC Role / Device Role: High-current, low-loss main switch with fast recovery body diode. Use Value: RDS(ON) < 5 mΩ cuts conduction loss by >30% vs. legacy 10 mΩ MOSFETs, improving efficiency at 100 A output. |
Use Scenario: Hot-swap controller and redundant power path selection in telecom shelf systems. IC Role / Device Role: Load switch with controlled inrush and fault protection via current sensing. Use Value: 120 A rating and 175°C TJ allow full-rated operation in confined, forced-air telecom enclosures. |
| Motor Drive Half-Bridge | Server PSU Secondary-Side Switch |
|
Use Scenario: Low-side switch in 24–48 V BLDC motor gate drivers for HVAC and industrial fans. IC Role / Device Role: High-di/dt capable switch with low Qgd/Qg ratio for clean turn-off. Use Value: Qgd = 15 nC and Crss = 5 pF minimize Miller-induced shoot-through risk in 100 kHz PWM operation. |
Use Scenario: Synchronous rectifier in 12 V output stage of multi-phase server PSUs. IC Role / Device Role: Efficient, thermally robust power switch with low RDS(ON) and high IAS. Use Value: 735 A pulsed drain current rating supports peak loads during CPU burst activity without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP120N10F7 | 100 V rating, RDS(ON) = 4.5 mΩ @ 10 V, Qg = 105 nC - lower voltage, similar on-resistance | Not suitable for 150 V bus designs; limited to ≤ 60 V systems | Select only if system VDS max ≤ 100 V and higher avalanche margin is not required |
| IXTP120N10T | 100 V rating, RDS(ON) = 5.2 mΩ @ 10 V, EAS = 220 mJ - lower avalanche energy, same package | Lacks 100% UIS test validation; reduced ruggedness in inductive switching | Acceptable for non-critical load switching where transient energy is tightly controlled |
Compared with STP120N10F7 and IXTP120N10T, the AOT66518L provides unique 150 V capability, guaranteed 375 mJ avalanche energy, and AlphaSGT™-optimized SOA - making it the only option among the three qualified for 48 V telecom hot-swap and industrial 150 V DC link applications.
Availability
AOT66518L is available at Aetrix Electronics and suitable for industrial power supply, telecom DC-DC converter, and motor drive applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AOT66518L 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 ICs for computing, consumer, industrial, and telecom markets.
The AOT66518L belongs to AOS' AlphaSGT™ Trench MOSFET product line, engineered for high-current, high-ruggedness applications demanding low RDS(ON), wide SOA, and reliable avalanche performance.
FAQ
What is the maximum continuous drain current rating for AOT66518L at 100°C case temperature?
The AOT66518L supports 70 A continuous drain current at TC = 100°C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits of the TO-220 package and ensures safe operation within the 175°C maximum junction temperature. The AOT66518L maintains stable RDS(ON) performance across this range due to its AlphaSGT™ structure.
Does AOT66518L have a fully rated body diode for reverse recovery applications?
Yes, the AOT66518L features a fully characterized body diode with trr = 86 ns and Qrr = 920 nC at IF = 20 A and di/dt = 500 A/ms. Its VSD = 0.68–1.0 V forward voltage supports efficient freewheeling in synchronous rectifiers and H-bridge topologies. The AOT66518L body diode is 100% tested per production lot.
What gate voltage is required to fully enhance AOT66518L for low RDS(ON) operation?
The AOT66518L achieves its specified RDS(ON) < 5 mΩ at VGS = 10 V, with gate threshold voltage VGS(th) ranging from 2.7 V to 3.7 V. For robust conduction and minimal on-resistance variation across temperature, a nominal 10 V gate drive is recommended. The AOT66518L remains fully enhanced down to VGS = 8 V (RDS(ON) < 5.6 mΩ), supporting partial-gate-drive designs.
Is AOT66518L suitable for linear-mode (SOA-limited) operation?
Yes, the AOT66518L is explicitly characterized for linear-mode use with a defined Forward Biased Safe Operating Area (SOA) curve up to 10 ms pulse width. Its wide SOA, combined with RθJC = 0.4 °C/W, enables stable operation in active current limiting, hot-swap controllers, and analog pass elements. The AOT66518L SOA data is validated per Note F in the datasheet.
What thermal resistance values apply to AOT66518L in TO-220 package?
The AOT66518L has RθJC = 0.4 °C/W (junction-to-case) and RθJA = 60 °C/W (junction-to-ambient, still air). These values define thermal design boundaries: RθJC governs heatsink interface performance, while RθJA applies to board-level convection cooling. The AOT66518L datasheet provides normalized transient impedance curves (Figures 11 and 16) for dynamic thermal modeling.
AOT66518L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- AlphaSGT™
- Package/Case:
- TO-220-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 150 V
- Current - Continuous Drain (Id) @ 25°C:
- 30A (Ta), 120A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 8V, 10V
- Rds On (Max) @ Id, Vgs:
- 5mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 3.7V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 115 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 6460 pF @ 75 V
- FET Feature:
- -
- Power Dissipation (Max):
- 10W (Ta), 375W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
AOT66518L FAQ
1.How can I place an order for AOT66518L through Aetrix?
Please submit a Request for Quotation (RFQ) for AOT66518L 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 AOT66518L reliable?
The price and inventory of AOT66518L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOT66518L is usually 5 days.
3.What payment methods are accepted for AOT66518L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOT66518L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOT66518L?
AOT66518L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOT66518L 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 AOT66518L?
For technical support, including AOT66518L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOT66518L requirements.
6.How does Aetrix verify that AOT66518L is sourced from the original manufacturer or authorized distributors?
All AOT66518L 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 AOT66518L meets industry standards.
7.What is the process for return or replacement of AOT66518L?
All AOT66518L units undergo pre-shipment inspection (PSI). If there is an issue with AOT66518L, 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 AOT66518L part is unused and in its original packaging.
Return procedure for AOT66518L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOT66518L Tags
-
BSZ180P03NS3EGATMA1
Infineon Technologies
-
SIRA14DP-T1-GE3
Vishay Siliconix
-
AO4419
Alpha & Omega Semiconductor Inc.
-
SISA14BDN-T1-GE3
Vishay Siliconix
-
PSMN9R5-30YLC,115
Nexperia USA Inc.
-
BUK9Y21-40E,115
Nexperia USA Inc.
-
RTQ035N03HZGTR
Rohm Semiconductor
-
FDMS7680
onsemi
-
RQ3E180BNTB
Rohm Semiconductor
-
STL6N2VH5
STMicroelectronics
-
DMPH4029LFGQ-7
Diodes Incorporated
-
DMT6015LSS-13
Diodes Incorporated
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
