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Diodes Incorporated DMTH43M7LFGQ-7
- Part No.:
- DMTH43M7LFGQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- 8-PowerVDFN
- Datasheet:
-
DMTH43M7LFGQ-7.pdf
- Description:
- MOSFET BVDSS: 31V~40V POWERDI333
- Quantity:
- Payment:
- Shipping:
Inventory:5,917
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Product details
Overview
DMTH43M7LFGQ-7 from Diodes Incorporated is an AEC-Q101 qualified 40V N-channel enhancement-mode MOSFET in PowerDI3333-8 package, rated for continuous 100A drain current at VGS = 10V and 3.0mΩ RDS(ON), operating up to +175°C junction temperature. It delivers robust unclamped inductive switching performance (EAS = 185.3mJ) and low gate charge (QG = 30nC), making it suitable for high-efficiency automotive motor control and DC-DC converter primary-side switching.
For engineers reviewing the DMTH43M7LFGQ-7 datasheet, DMTH43M7LFGQ-7 pinout, DMTH43M7LFGQ-7 application, or DMTH43M7LFGQ-7 equivalent, key selection criteria include its 175°C thermal rating, 3.0mΩ/5.0mΩ dual-gate-voltage RDS(ON) specification, AEC-Q101 qualification with PPAP support, and PowerDI3333-8 thermal performance (RθJC = 2.3°C/W).
Technical Context
This MOSFET employs a trench-gate silicon process optimized for low RDS(ON) and fast switching in high-current automotive power stages. Its gate threshold voltage (VGS(TH) = 1–2.5V) enables reliable turn-on with standard 5V or 10V gate drivers, while its low QGD × RDS(ON) figure of merit minimizes switching losses during hard-switched operation.
The device integrates a co-packaged body diode with VSD = 0.8–1.0V at 20A and tRR = 39.5ns, supporting synchronous rectification and freewheeling in buck, half-bridge, and H-bridge topologies. Thermal design leverages the exposed drain pad in PowerDI3333-8 for direct PCB copper conduction, achieving 2.3°C/W junction-to-case resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 40V - Maximum blocking voltage for 12V/24V automotive battery rail protection and DC-DC input stage |
| RDS(ON) @ VGS = 10V | 3.0mΩ max - Enables <1.2W conduction loss at 20A, critical for thermally constrained engine bay modules |
| ID Continuous @ TC = 25°C | 100A - Supports high-current motor phase drivers and starter solenoid control without external heatsinking |
| TJ Operating Range | −55°C to +175°C - Qualified for under-hood applications including transmission control units and EPS systems |
| EAS | 185.3mJ - Guarantees ruggedness against inductive kickback in motor drive and relay driving circuits |
| QG | 30nC - Reduces gate driver power demand and enables >100kHz switching in compact DC-DC converters |
| RθJC | 2.3°C/W - Allows direct thermal coupling to PCB copper pour for efficient heat extraction in space-constrained layouts |
Pinout & Package
Package: PowerDI®3333-8 surface-mount package with exposed drain pad for enhanced thermal dissipation and mechanical robustness in automotive vibration environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Drain (D) | Internally connected to exposed metal pad; primary current path and thermal conduction path to PCB |
| 5, 6, 7, 8 | Source (S) | Four parallel source terminals reduce loop inductance and improve current sharing in high-di/dt switching |
| 3 (center) | Gate (G) | Single gate input terminal; positioned for minimal trace length to reduce EMI and gate oscillation risk |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified with PPAP support | Meets automotive reliability requirements for mission-critical power stages; full change control documentation available |
| 100% UIS tested in production | Each unit validated for unclamped inductive switching stress, eliminating field failure risk in motor commutation |
| Low QGD × RDS(ON) FOM | Optimized for high-frequency hard-switching efficiency in 48V mild-hybrid DC-DC converters |
| Lead-free, halogen- and antimony-free "Green" construction | Complies with RoHS 3 and automotive ELV directives; matte tin annealed finish ensures solderability and wire bond compatibility |
| PowerDI3333-8 thermal footprint | Delivers 65.2W power dissipation at TC = 25°C-2.8× higher than SO-8 equivalents with same PCB area |
Applications
| Electric Power Steering (EPS) | Automotive DC-DC Converters |
|---|---|
|
Use Scenario: High-current H-bridge driver controlling brushless motor torque in steering assist systems. IC Role / Device Role / Timing Role: Primary high-side and low-side switching element handling bidirectional 60–80A peak motor current. Use Value: 175°C rating enables operation near engine compartment heat sources; low RDS(ON) reduces thermal load on motor controller PCB. |
Use Scenario: Primary-side switch in 48V-to-12V bi-directional DC-DC converter for mild hybrid vehicles. IC Role / Device Role / Timing Role: Synchronous rectifier and main switching transistor in interleaved buck-boost topology. Use Value: 30nC QG supports 200kHz+ switching frequency; 185.3mJ EAS withstands transient overloads during regenerative braking events. |
| Engine Control Unit (ECU) Load Drivers | Transmission Control Module (TCM) |
|
Use Scenario: Driving high-power solenoids and fuel injectors requiring precise pulse-width modulated current control. IC Role / Device Role / Timing Role: Low-side switch with integrated body diode for inductive load freewheeling and flyback energy recovery. Use Value: 39.5ns tRR and 0.8V VSD minimize switching loss and voltage overshoot during rapid turn-off cycles. |
Use Scenario: Clutch actuation and valve timing control in automatic transmissions using PWM-driven electromagnetic actuators. IC Role / Device Role / Timing Role: High-current, high-reliability power switch operating continuously at elevated ambient temperatures (>125°C). Use Value: −55°C to +175°C operating range ensures functionality across cold-start to hot-soak conditions; IATF 16949 manufacturing guarantees lot traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXTQ100N10P | 100V VDSS, 10mΩ RDS(ON), TO-264 package, RθJC = 0.4°C/W | Higher voltage margin but larger footprint and lower current density; requires external heatsink | Select when system-level overvoltage transients exceed 40V or thermal interface allows bolt-down heatsinking |
| STL220N4F7AG | 40V VDSS, 0.75mΩ RDS(ON), PowerFLAT 5x6 package, RθJC = 1.5°C/W | Lower RDS(ON) but not AEC-Q101 qualified; no PPAP or IATF 16949 manufacturing evidence | Select only for non-safety-critical industrial DC-DC where qualification documentation is not required |
Compared with IXTQ100N10P and STL220N4F7AG, DMTH43M7LFGQ-7 uniquely balances AEC-Q101 compliance, 100A current capability in a thermally efficient 3.3mm × 3.3mm footprint, and production-tested UIS robustness-making it optimal for volume automotive power stages where qualification, size, and ruggedness are jointly constrained.
Availability
DMTH43M7LFGQ-7 is available at Aetrix Electronics and suitable for electric power steering (EPS), automotive DC-DC converters, and transmission control modules requiring stable component supply across extended temperature ranges and rigorous automotive qualification.
Supply support for DMTH43M7LFGQ-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.
This MOSFET belongs to Diodes' Automotive Power Solutions product line, engineered specifically for AEC-Q101-compliant high-current switching in engine bay and chassis-mounted electronic control units.
FAQ
What is the maximum pulsed drain current rating for DMTH43M7LFGQ-7?
The device supports 400A pulsed drain current (IDM) under 10μs pulse width and 1% duty cycle conditions, verified per datasheet maximum ratings table. This rating applies only with proper PCB thermal design and is limited by package bondwire and die metallization integrity-not junction temperature alone.
Does DMTH43M7LFGQ-7 require a gate resistor for automotive motor drive applications?
Yes-a gate resistor between 1.0Ω and 3.3Ω is recommended to dampen ringing and control dV/dt during turn-on/turn-off. The device's 1.9Ω typical gate resistance (RG) and 30nC total gate charge make it sensitive to parasitic inductance; layout optimization and controlled gate drive slew rate prevent shoot-through and EMI.
How does the body diode performance compare to discrete Schottky alternatives?
The integrated body diode has VSD = 0.8–1.0V at 20A and tRR = 39.5ns, which is slower and higher forward drop than a Schottky diode but eliminates component count and layout complexity. For synchronous rectification above 100kHz, external Schottky placement may be preferred-but for motor freewheeling and solenoid clamping, the body diode is fully adequate and production-validated.
Is the PowerDI3333-8 package compatible with standard reflow profiles for lead-free assembly?
Yes-the package is rated for moisture sensitivity level 1 per J-STD-020 and uses matte tin annealed finish compliant with MIL-STD-202 Method 208. Standard IPC/JEDEC J-STD-020D.01 lead-free reflow profiles (peak 260°C, 60s above 217°C) are supported without preconditioning, provided board thermal mass and oven profiling match Diodes' recommended ramp rates.
DMTH43M7LFGQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-PowerVDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 100A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 5V, 10V
- Rds On (Max) @ Id, Vgs:
- 3mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.5V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 30 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2182 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 3.5W (Ta), 65.2W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- POWERDI3333-8
DMTH43M7LFGQ-7 FAQ
1.How can I place an order for DMTH43M7LFGQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DMTH43M7LFGQ-7 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 DMTH43M7LFGQ-7 reliable?
The price and inventory of DMTH43M7LFGQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMTH43M7LFGQ-7 is usually 5 days.
3.What payment methods are accepted for DMTH43M7LFGQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMTH43M7LFGQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMTH43M7LFGQ-7?
DMTH43M7LFGQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMTH43M7LFGQ-7 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 DMTH43M7LFGQ-7?
For technical support, including DMTH43M7LFGQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMTH43M7LFGQ-7 requirements.
6.How does Aetrix verify that DMTH43M7LFGQ-7 is sourced from the original manufacturer or authorized distributors?
All DMTH43M7LFGQ-7 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 DMTH43M7LFGQ-7 meets industry standards.
7.What is the process for return or replacement of DMTH43M7LFGQ-7?
All DMTH43M7LFGQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMTH43M7LFGQ-7, 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 DMTH43M7LFGQ-7 part is unused and in its original packaging.
Return procedure for DMTH43M7LFGQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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