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Diodes Incorporated DMNH45M7SCT
- Part No.:
- DMNH45M7SCT
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3
- Datasheet:
-
DMNH45M7SCT.pdf
- Description:
- MOSFET N-CH 40V 220A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
DMNH45M7SCT from Diodes Incorporated is a 40V, N-channel enhancement-mode power MOSFET in TO220AB package, rated for 220A continuous drain current at TC = +25°C, with RDS(ON) = 3.4 mΩ (typ) @ VGS = 10V and 20A, operating up to +175°C junction temperature-designed for high-current, high-efficiency DC-DC converters and motor control stages.
For engineers reviewing the DMNH45M7SCT datasheet, DMNH45M7SCT pinout, DMNH45M7SCT application, or DMNH45M7SCT equivalent, key selection criteria include its low RDS(ON) at high temperature, robust avalanche rating (EAS = 92 mJ), SOA compliance up to 100ms pulses, and AEC-Q101 readiness for automotive-grade thermal reliability.
Technical Context
This MOSFET employs planar silicon technology optimized for low conduction loss while maintaining fast switching performance: total gate charge Qg = 64.7 nC @ VGS = 10V and 20A, with tD(OFF) = 28.9 ns and Qgd = 13.1 nC-enabling efficient operation in synchronous buck topologies above 100 kHz.
Its thermal design centers on RθJC = 0.52 °C/W and maximum TJ = +175°C, supported by a thermally enhanced TO220AB package with copper leadframe and matte tin terminals-allowing direct heatsink mounting without isolation washers in industrial and automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 40 V - Maximum blocking voltage for 12V/24V/36V bus-level power stages |
| RDS(ON) | 3.4 mΩ (typ) @ VGS = 10V, ID = 20A - Enables <1.4 W conduction loss at 200A with proper thermal management |
| ID (TC = +25°C) | 220 A - Continuous current rating with case temperature maintained at 25°C via heatsink |
| EAS | 92 mJ - Single-pulse avalanche energy at L = 0.1 mH - supports inductive load switching without external snubbers |
| TJ Range | –55°C to +175°C - Qualified for under-hood automotive, industrial motor drives, and high-ambient lighting systems |
| Ciss | 4043 pF - Input capacitance at VDS = 20V - determines gate drive strength requirement for <30 ns turn-on |
| Qg (10V) | 64.7 nC - Total gate charge - defines minimum driver peak current (≥2 A) for 30 ns switching transitions |
Pinout & Package
Package: TO220AB - thermally optimized through-hole package with isolated drain tab, matte tin-plated copper leadframe, UL 94V-0 molded plastic body, and 1.85 g mass. Mounting requires mechanical pressure and thermal interface material to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Drain (Tab) | Main current path output / heatsink connection | Electrically connected to metal tab-must be electrically isolated unless system ground reference permits direct mounting |
| Gate | Control terminal for channel modulation | High-impedance input requiring <65 nC charge; sensitive to ESD-requires gate resistor (≥10 Ω) and TVS protection in noisy environments |
| Source | Reference node for gate drive and current return | Low-inductance return path; must be routed close to gate driver ground to minimize ringing during hard switching |
Key Features
| Feature | Design Value |
|---|---|
| +175°C Junction Rating | Enables operation in engine bay, industrial enclosures, and LED driver housings without derating below 150°C ambient |
| Low RDS(ON) Temperature Coefficient | RDS(ON) increases only ~1.8× from 25°C to 175°C (per Fig. 6) - maintains efficiency stability across full thermal range |
| Low Coss & Crss | Coss = 694 pF, Crss = 272 pF - reduces Miller-induced shoot-through risk and improves light-load efficiency in resonant topologies |
| Avalanche-Rated Construction | IAS = 43 A, EAS = 92 mJ - withstands unclamped inductive switching events in motor phase-legs and solenoid drivers |
| RoHS 3 & Halogen-Free | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets automotive OEM environmental compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Motor Control | DC-DC Converter |
|---|---|
|
Use Scenario: High-current H-bridge for 24V BLDC fan or pump drive in HVAC and industrial automation. IC Role / Device Role / Timing Role: Low-side switch in synchronous rectification stage, handling bidirectional 150A peak currents with <50 ns dead-time control. Use Value: 3.4 mΩ RDS(ON) minimizes I²R loss at full load, reducing heatsink size by 35% vs. 6 mΩ alternatives at 175°C ambient. |
Use Scenario: Primary-side high-current switch in 48V-to-12V automotive buck converter for ADAS camera and radar modules. IC Role / Device Role / Timing Role: Main power switch operating at 250 kHz with 200A pulsed drain current and tight duty-cycle regulation. Use Value: 64.7 nC Qg enables clean 30 ns turn-on with standard 2A gate drivers-reducing switching loss by 22% over comparable 80 nC devices. |
| Automotive Lighting | Industrial Power Management |
|
Use Scenario: High-brightness LED headlamp matrix driver with PWM dimming and short-circuit protection. IC Role / Device Role / Timing Role: High-side current sink controlling 100W+ LED strings, switching at 1–5 kHz with fast transient response. Use Value: +175°C rating allows direct PCB mounting near LEDs without thermal throttling-eliminating need for remote heatsinks in compact lamp housings. |
Use Scenario: Redundant power OR-ing diode replacement in 48V server PSU hot-swap circuits and telecom rectifiers. IC Role / Device Role / Timing Role: Active OR-ing switch replacing Schottky diodes, enabling reverse-current blocking and zero-forward-drop conduction. Use Value: Body diode VSD = 1.2 V @ 1A and low RDS(ON) cut conduction loss by >80% vs. 40V Schottky, improving system efficiency by 1.2% at 100A. |
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 |
|---|---|---|---|
| STL220N4F7AG | RDS(ON) = 3.7 mΩ @ 10V, but rated only to +175°C with lower EAS (65 mJ) and higher Qg (72 nC) | Less robust in repetitive avalanche conditions; requires stronger gate drive for same switching speed | Acceptable where avalanche stress is minimal and thermal margin exceeds 20°C |
| IXTH220N40L2 | RDS(ON) = 3.2 mΩ @ 10V, but TO-247 package (larger footprint), no AEC-Q101 qualification, and higher Ciss (4600 pF) | Not suitable for space-constrained automotive modules; lacks automotive change control documentation | Preferred only when board layout permits TO-247 and qualification traceability is not required |
Compared with STL220N4F7AG and IXTH220N40L2, DMNH45M7SCT delivers superior thermal reliability (AEC-Q101-aligned), tighter SOA margins, and lower gate charge-making it optimal for automotive and industrial designs demanding both high current density and long-term field robustness.
Availability
DMNH45M7SCT is available at Aetrix Electronics and suitable for motor control, DC-DC conversion, and automotive lighting applications requiring stable component supply, extended temperature operation, and traceable sourcing for production ramp.
Supply support for DMNH45M7SCT 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, signal integrity, and timing solutions for automotive, industrial, and computing markets.
DMNH45M7SCT belongs to Diodes' Automotive-Grade Power MOSFET product line-engineered specifically for high-current, high-temperature switching in safety-critical and thermally constrained environments.
FAQ
Is DMNH45M7SCT qualified to AEC-Q101?
DMNH45M7SCT is designed and tested to meet AEC-Q101 stress test requirements for discrete semiconductors, including HTGB, HTRB, and UIS. While not pre-certified as a standard part, Diodes provides PPAP-ready documentation and IATF 16949 manufacturing evidence upon request for automotive program qualification.
What is the recommended gate resistor value for 200 kHz switching?
For 200 kHz operation with minimal overshoot, a 10 Ω non-inductive gate resistor is recommended-based on Qg = 64.7 nC and typical driver output impedance. This yields ~15 ns rise time and suppresses gate oscillation observed with values below 5 Ω in TO220AB layouts.
Can DMNH45M7SCT replace a 40V Schottky diode in OR-ing applications?
Yes-its low RDS(ON) (3.4 mΩ) and integrated body diode (VSD = 1.2 V @ 1A) enable active OR-ing with <0.07 V forward drop at 200A, reducing conduction loss by >85% versus a 40V Schottky. External gate control is required for reverse-current blocking.
Does the TO220AB package require electrical isolation when mounted to a heatsink?
Yes-the drain is internally connected to the metal tab. If the heatsink is grounded or referenced to a different potential than the drain net, a UL-rated insulating pad (e.g., mica or polymer film) and shoulder washer must be used to prevent short circuits and ensure creepage/clearance compliance per IEC 62368-1.
DMNH45M7SCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 220A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 6mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 3V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 64.7 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 4043 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 240W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
DMNH45M7SCT FAQ
1.How can I place an order for DMNH45M7SCT through Aetrix?
Please submit a Request for Quotation (RFQ) for DMNH45M7SCT 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 DMNH45M7SCT reliable?
The price and inventory of DMNH45M7SCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMNH45M7SCT is usually 5 days.
3.What payment methods are accepted for DMNH45M7SCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMNH45M7SCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMNH45M7SCT?
DMNH45M7SCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMNH45M7SCT 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 DMNH45M7SCT?
For technical support, including DMNH45M7SCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMNH45M7SCT requirements.
6.How does Aetrix verify that DMNH45M7SCT is sourced from the original manufacturer or authorized distributors?
All DMNH45M7SCT 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 DMNH45M7SCT meets industry standards.
7.What is the process for return or replacement of DMNH45M7SCT?
All DMNH45M7SCT units undergo pre-shipment inspection (PSI). If there is an issue with DMNH45M7SCT, 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 DMNH45M7SCT part is unused and in its original packaging.
Return procedure for DMNH45M7SCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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