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Diodes Incorporated DMTH43M8LFG-7
- Part No.:
- DMTH43M8LFG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- 8-PowerVDFN
- Datasheet:
-
DMTH43M8LFG-7.pdf
- Description:
- MOSFET N-CH 40V PWRDI3333
- Quantity:
- Payment:
- Shipping:
Inventory:5,890
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Product details
Overview
DMTH43M8LFG-7 from Diodes Incorporated is a 40V, 100A N-channel enhancement-mode MOSFET in PowerDI3333-8 package, featuring 3.0mΩ RDS(ON) @ VGS=10V, 175°C maximum junction temperature, and AEC-Q101 qualification. It serves as a high-current synchronous rectifier or main switch in automotive and industrial DC-DC converters requiring low conduction loss and robust thermal performance.
For engineers reviewing the DMTH43M8LFG-7 datasheet, DMTH43M8LFG-7 pinout, DMTH43M8LFG-7 application, or DMTH43M8LFG-7 equivalent, key selection criteria include RDS(ON) at 5V/10V gate drive, unclamped inductive switching rating, thermal resistance (RθJC = 2.3°C/W), and PowerDI3333-8 footprint compatibility with high-power PCB layouts.
Technical Context
This MOSFET uses trench-gate silicon technology optimized for low RDS(ON) while maintaining fast switching via minimized QGD × RDS(ON) figure-of-merit (FOM). Its 175°C rated junction enables operation in under-hood automotive environments without derating.
The device integrates a robust body diode with tRR = 32.6ns and QRR = 26.6nC, supporting synchronous rectification and freewheeling in hard-switched topologies. The exposed drain pad ensures direct thermal path to PCB copper, validated by RθJC = 2.3°C/W and 65.2W power dissipation at TC = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 40V - Supports 24V nominal input systems with 66% voltage margin against transients. |
| RDS(ON) max | 3.0mΩ @ VGS=10V - Enables ≤3W conduction loss at 100A, critical for >95% efficiency in 48V-to-12V converters. |
| ID continuous | 100A @ TC=25°C - Matches high-current phase-leg requirements in multiphase VRMs and motor drivers. |
| TJ max | +175°C - Allows full-rated operation in engine control units (ECUs) and battery management systems (BMS) without thermal throttling. |
| QG | 40.1nC - Enables <100ns turn-on delay with 1.6Ω gate resistor, suitable for 500kHz+ switching frequencies. |
| EAS | 165mJ - Withstands single-pulse inductive energy up to 1mH/18.2A, eliminating need for external snubbers in flyback designs. |
| RθJC | 2.3°C/W - Delivers 28°C temperature rise per 10W dissipated, enabling compact heatsinkless designs on 2oz copper PCBs. |
Pinout & Package
Package: PowerDI3333-8 - Surface-mount, thermally enhanced plastic package with exposed drain pad (pins 5–8) and 3.3mm × 3.3mm footprint. UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Source | Low-side reference node; tied to PCB ground plane for minimal loop inductance in high-di/dt applications. |
| 2 (S) | Source | Parallel source connection to reduce bondwire resistance and improve current sharing across internal die cells. |
| 3 (G) | Gate | Control input; requires <2.44Ω gate resistance to limit ringing during 400A pulsed switching (IDM). |
| 4 (D) | Drain | Main power output node; electrically and thermally connected to exposed pad (pins 5–8) for dual-path conduction and heat extraction. |
| 5–8 (D) | Drain (exposed pad) | Primary thermal interface; must be soldered to ≥1-inch² 2oz copper pour for rated 65.2W dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 100% UIS tested | Guarantees avalanche ruggedness to 165mJ per pulse, eliminating field failures from inductive kickback in motor drives. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, TC, and ESD testing-enables use in ADAS and powertrain modules. |
| Low QGD × RDS(ON) | 8.8nC × 3.0mΩ = 26.4mΩ·nC FOM - Reduces switching loss by 22% vs. comparable 40V MOSFETs at 500kHz, extending battery life in portable power tools. |
| Green compound | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets automotive ELV and RoHS 3 compliance. |
| Body diode tRR | 32.6ns reverse recovery time - Minimizes cross-conduction loss in synchronous buck converters operating above 300kHz. |
Applications
| Automotive DC-DC Converters | Industrial Motor Drives |
|---|---|
|
Use Scenario: 48V-to-12V bidirectional converter in mild-hybrid vehicles, operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: High-side synchronous rectifier switch with 100A peak current handling and 175°C thermal headroom. Use Value: 3.0mΩ RDS(ON) reduces conduction loss by 4.2W vs. 4.5mΩ alternatives, lowering heatsink mass by 35g in space-constrained ECU enclosures. |
Use Scenario: Half-bridge leg in 3kW servo drive for CNC machinery, switching at 20kHz with 150A peak load current. IC Role / Device Role / Timing Role: Low-side power switch with 2.3°C/W thermal resistance enabling direct PCB cooling without forced air. Use Value: 65.2W power dissipation at TC=25°C allows full 100A rating on 4-layer boards, eliminating costly baseplate assemblies. |
| Server VRM Phase Legs | Renewable Energy Inverters |
|
Use Scenario: Multiphase buck converter supplying [email protected] to AI accelerators, operating at 1MHz with tight thermal constraints. IC Role / Device Role / Timing Role: Synchronous rectifier with 40.1nC total gate charge enabling fast turn-on (5.16ns delay) and low driver loss. Use Value: 8.8nC QGD minimizes Miller plateau time, reducing switching loss by 18% over competitive 40V MOSFETs at 1MHz. |
Use Scenario: DC link switch in 5kW solar microinverter, subjected to 125°C case temperature in rooftop enclosures. IC Role / Device Role / Timing Role: High-reliability main switch with AEC-Q101 qualification and 165mJ avalanche energy rating. Use Value: 175°C TJ rating permits full 100A current at 125°C case temperature, avoiding derating that would require paralleling two devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current 40V MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRL1404ZPBF | RDS(ON) = 4.0mΩ @ 10V; RθJC = 3.0°C/W; no AEC-Q101 qualification | Limited to industrial/commercial use; requires larger PCB copper area for same thermal performance | Select when cost sensitivity outweighs automotive qualification and thermal efficiency needs. |
| DMTH4004LPS-13 | RDS(ON) = 2.8mΩ @ 10V; PowerDI5060 package (5.0×6.0mm); higher QG = 52nC | Slower switching due to higher gate charge; larger footprint increases board area by 220% | Select when lower RDS(ON) is prioritized over switching speed and board space constraints. |
Compared with IRL1404ZPBF and DMTH4004LPS-13, DMTH43M8LFG-7 delivers optimal balance of ultra-low RDS(ON), industry-leading thermal resistance, and automotive qualification in the smallest possible footprint-making it the preferred choice for space- and thermal-constrained high-power designs.
Availability
DMTH43M8LFG-7 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial motor drives, and server VRM phase legs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for DMTH43M8LFG-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 solutions for automotive, industrial, and computing markets.
This MOSFET belongs to Diodes' PowerMOS™ family, engineered specifically for high-efficiency, high-temperature power conversion where low RDS(ON), rugged avalanche performance, and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the maximum continuous drain current for DMTH43M8LFG-7 at 100°C case temperature?
The datasheet specifies 85A continuous drain current at TC = +100°C with VGS = 10V. This rating is derived from thermal limits and RDS(ON) derating curves, ensuring safe operation without exceeding 175°C junction temperature under sustained load conditions.
Does DMTH43M8LFG-7 support gate drive voltages below 5V?
Yes-its gate threshold voltage (VGS(TH)) ranges from 1.0V to 2.5V, and RDS(ON) is specified at 5.0mΩ @ VGS = 5V. However, full 100A rating requires 10V drive; at 5V, maximum continuous current is 93A per product summary.
How is the PowerDI3333-8 package thermally optimized compared to standard SO-8?
The PowerDI3333-8 exposes the drain pad across pins 5–8, providing direct thermal conduction to PCB copper. Its RθJC of 2.3°C/W is 3.5× lower than typical SO-8 packages (~8.0°C/W), enabling 65.2W dissipation versus ~18W for equivalently sized SO-8 MOSFETs.
Is DMTH43M8LFG-7 suitable for synchronous rectification in isolated DC-DC converters?
Yes-the device's low QRR (26.6nC) and fast tRR (32.6ns) minimize reverse recovery losses, while its 100% UIS-tested avalanche capability handles leakage inductance spikes. Its 175°C rating supports high ambient operation in enclosed power supplies.
DMTH43M8LFG-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:
- 24A (Ta), 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:
- 40.1 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2798 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 2.62W (Ta), 65.2W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- POWERDI3333-8
DMTH43M8LFG-7 FAQ
1.How can I place an order for DMTH43M8LFG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DMTH43M8LFG-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 DMTH43M8LFG-7 reliable?
The price and inventory of DMTH43M8LFG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMTH43M8LFG-7 is usually 5 days.
3.What payment methods are accepted for DMTH43M8LFG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMTH43M8LFG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMTH43M8LFG-7?
DMTH43M8LFG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMTH43M8LFG-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 DMTH43M8LFG-7?
For technical support, including DMTH43M8LFG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMTH43M8LFG-7 requirements.
6.How does Aetrix verify that DMTH43M8LFG-7 is sourced from the original manufacturer or authorized distributors?
All DMTH43M8LFG-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 DMTH43M8LFG-7 meets industry standards.
7.What is the process for return or replacement of DMTH43M8LFG-7?
All DMTH43M8LFG-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMTH43M8LFG-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 DMTH43M8LFG-7 part is unused and in its original packaging.
Return procedure for DMTH43M8LFG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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