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Diodes Incorporated DMN4040SK3-13
- Part No.:
- DMN4040SK3-13
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
DMN4040SK3-13.pdf
- Description:
- MOSFET N-CH 40V 6A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,650
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Product details
Overview
DMN4040SK3 from Diodes Incorporated is an N-channel enhancement-mode MOSFET optimized for high-efficiency power management, featuring 40 V VDSS, 30 mΩ RDS(ON) @ 10 VGS, and 13.8 A continuous drain current at TA = +25°C on a 2" × 2" FR-4 PCB. It serves as a main or synchronous rectifier switch in DC-DC converters and LED backlight drivers.
For engineers reviewing the DMN4040SK3 datasheet, DMN4040SK3 pinout, DMN4040SK3 application, or DMN4040SK3 equivalent, key selection criteria include RDS(ON) at 4.5 VGS (54 mΩ), thermal resistance (30.8 °C/W), gate charge (18.6 nC @ 10 V), and TO252-3L package compatibility with high-current PCB layouts.
Technical Context
This MOSFET employs planar trench-gate technology to balance low conduction loss and fast switching performance. Its 1.8–3.0 V gate threshold voltage enables reliable turn-on with standard logic-level drivers, while its 945 pF input capacitance and 58 pF reverse transfer capacitance support stable operation in 500 kHz–1 MHz buck converters.
The device integrates a body diode with 0.76–1.0 V forward voltage at 1 A, suitable for freewheeling in non-synchronous topologies. Thermal design is enabled by its 30.8 °C/W RθJA under high-copper PCB conditions and 14 °C/W for ≤10 s pulses-critical for transient load handling in portable power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 40 V - Maximum blocking voltage for 12 V/24 V input DC-DC stages |
| RDS(ON) @ 10 VGS | 30 mΩ - Enables <1.2 W conduction loss at 6.3 A in 5 V output rails |
| RDS(ON) @ 4.5 VGS | 54 mΩ - Supports direct drive from 3.3 V microcontrollers without level shifters |
| Qg @ 10 V | 18.6 nC - Determines gate driver power requirement (~186 μJ per 10 V switch cycle) |
| Ciss | 945 pF - Sets Miller plateau duration and influences EMI filtering needs |
| RθJA (2"×2" PCB) | 30.8 °C/W - Defines heatsink-free power capability: ~130 mW ambient rise per watt dissipated |
| ID (t ≤ 10 s) | 13.8 A - Supports peak-load surge handling in battery-powered motor drives |
Pinout & Package
Package: TO252-3L (DPAK), surface-mount, single-sided copper layout optimized for thermal and current handling. Exposed drain pad occupies >75% of bottom footprint for low-inductance, high-current routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D (Drain) | Main current path output terminal | Connected to exposed metal tab; must be routed to ground plane or high-current trace with ≥2 oz copper |
| S (Source) | Reference node for gate control and current return | Low-impedance connection point for gate driver return and current sensing resistor |
| G (Gate) | Control input for channel modulation | High-impedance node requiring RC snubber (10 Ω + 100 pF) to suppress ringing in hard-switching apps |
Key Features
| Feature | Design Value |
|---|---|
| Low RDS(ON) at 4.5 VGS | 54 mΩ enables direct 3.3 V MCU control without external level-shifting circuitry |
| Fast switching with low Qgd/Qg ratio | 2.2 nC / 18.6 nC = 11.8% - reduces Miller-induced shoot-through risk in half-bridge configurations |
| Low leakage IDSS | ≤1.0 μA at 40 V - ensures minimal standby power loss in always-on systems |
| Halogen- and antimony-free "Green" compound | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets IPC-1752A Class 3 material declarations |
Applications
| LED Backlight Driver | USB-C PD Buck Converter |
|---|---|
Use Scenario: Driving parallel white LED strings in automotive instrument clusters with 12 V input and 30–40 V output. IC Role / Device Role / Timing Role: Synchronous rectifier switch operating at 500 kHz PWM frequency with forced continuous conduction mode. Use Value: 30 mΩ RDS(ON) limits conduction loss to <570 mW at 13.8 A peak, enabling compact thermal design without heatsinks. | Use Scenario: Step-down conversion from 20 V USB-C PD input to 5 V/3 A for portable SSDs. IC Role / Device Role / Timing Role: High-side main switch in synchronous buck topology with 1 MHz switching frequency. Use Value: 945 pF Ciss and 18.6 nC Qg allow efficient gate driving with TC4427-class drivers, minimizing switching loss below 120 mW. |
| Industrial PLC Power Rail | Smartphone Fast-Charging Module |
Use Scenario: 24 V-to-5 V auxiliary supply for I/O modules in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Low-duty-cycle high-current switch managing 10 A pulsed loads during solenoid actuation. Use Value: 13.8 A t ≤ 10 s rating supports 500 ms solenoid bursts without thermal derating on standard 2 oz copper PCBs. | Use Scenario: Dual-phase buck converter in smartphone PMIC delivering 10 A total to SoC core rail. IC Role / Device Role / Timing Role: Phase-leg switch operating in interleaved 2 MHz mode with 4.5 V gate drive from integrated controller. Use Value: 54 mΩ RDS(ON) at 4.5 VGS ensures <300 mW per phase conduction loss, critical for thermal envelope compliance inside thin form factors. |
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 |
|---|---|---|---|
| DMN3040LSD-13 | 30 V VDSS, 28 mΩ @ 10 VGS, SO-8 package | Limited to ≤30 V input rails; lower thermal mass restricts pulse current to 9.5 A | Select when board space is constrained and 30 V rating suffices; avoid for 40 V transients |
| IPB040N04LGATMA1 | 40 V VDSS, 3.8 mΩ @ 10 VGS, TO-263-3 package | Lower RDS(ON) but higher Qg (45 nC); requires stronger gate driver | Choose for ultra-low-loss 12 V input systems where gate drive capability permits |
Compared with DMN3040LSD-13, DMN4040SK3 offers 33% higher voltage margin and TO252 thermal robustness; versus IPB040N04LGATMA1, it trades 8-fold RDS(ON) increase for 60% lower gate charge and simpler drive requirements-ideal for cost-sensitive, medium-power industrial converters.
Availability
DMN4040SK3 is available at Aetrix Electronics and suitable for LED backlighting, DC-DC converters, and power management functions requiring stable component supply across automotive infotainment, industrial HMIs, and consumer charging systems.
Supply support for DMN4040SK3 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200.
The DMN4040SK3 belongs to Diodes' "PowerMOS" product line, engineered for high-efficiency, medium-voltage switching in space-constrained power supplies and battery-operated equipment.
FAQ
What is the maximum safe operating temperature for DMN4040SK3?
The junction temperature must not exceed +150°C. With RθJA = 30.8 °C/W on a 2" × 2" 2 oz copper PCB, sustained 4.1 W power dissipation raises junction temperature by 127°C above ambient-so operation above +23°C ambient requires thermal derating. Short pulses (<10 s) allow up to 8.9 W with corresponding transient thermal resistance of 14 °C/W.
Can DMN4040SK3 be used in automotive applications?
DMN4040SK3 is not AEC-Q101 qualified. For automotive use, Diodes recommends the pin-compatible Q-suffix variant DMN4040SK3Q-13, which undergoes stress testing per AEC-Q101, is PPAP-capable, and is manufactured in IATF 16949-certified facilities-required for engine control, ADAS, and body electronics.
How does the body diode performance affect synchronous rectifier designs?
The intrinsic body diode has VSD = 0.76–1.0 V at 1 A and exhibits soft recovery characteristics, reducing voltage spikes during dead-time commutation. In synchronous buck converters, this allows safe operation down to 50 ns dead time without external Schottky catch diodes-lowering BOM count and improving light-load efficiency.
What PCB layout practices maximize thermal performance?
Maximize copper area under the exposed drain pad using ≥2 oz copper and thermal vias (≥8 × 0.3 mm diameter) to inner ground planes. Maintain ≥1.5 mm clearance between G and S traces to minimize gate noise coupling. Route the source trace directly to the current-sense resistor and gate driver ground to avoid common-impedance coupling that causes oscillation.
DMN4040SK3-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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:
- 6A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 30mOhm @ 12A, 10V
- Vgs(th) (Max) @ Id:
- 3V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 18.6 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 945 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 1.71W (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
DMN4040SK3-13 FAQ
1.How can I place an order for DMN4040SK3-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DMN4040SK3-13 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 DMN4040SK3-13 reliable?
The price and inventory of DMN4040SK3-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMN4040SK3-13 is usually 5 days.
3.What payment methods are accepted for DMN4040SK3-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMN4040SK3-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMN4040SK3-13?
DMN4040SK3-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMN4040SK3-13 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 DMN4040SK3-13?
For technical support, including DMN4040SK3-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMN4040SK3-13 requirements.
6.How does Aetrix verify that DMN4040SK3-13 is sourced from the original manufacturer or authorized distributors?
All DMN4040SK3-13 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 DMN4040SK3-13 meets industry standards.
7.What is the process for return or replacement of DMN4040SK3-13?
All DMN4040SK3-13 units undergo pre-shipment inspection (PSI). If there is an issue with DMN4040SK3-13, 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 DMN4040SK3-13 part is unused and in its original packaging.
Return procedure for DMN4040SK3-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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