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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Diodes Incorporated DMJ7N70SK3-13

Name: DMJ7N70SK3-13
Brand: Diodes Incorporated
SKU: DMJ7N70SK3-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DMJ7N70SK3-13

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: DMJ7N70SK3-13.pdf

Description:: MOSFET N-CH 700V 3.9A TO252

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Product details

Overview

DMJ7N70SK3-13 from Diodes Incorporated is a 700V N-channel enhancement-mode MOSFET in TO252 (DPAK) package, rated for 3.9A continuous drain current at 25°C, with R_DS(ON) = 1.25Ω @ V_GS = 10V and 100% production-tested UIS capability; used in offline AC-DC flyback power supplies and industrial DC-DC converters requiring high-voltage switching robustness.

For engineers reviewing the DMJ7N70SK3-13 datasheet, DMJ7N70SK3-13 pinout, DMJ7N70SK3-13 application, or DMJ7N70SK3-13 equivalent, key selection criteria include breakdown voltage margin, R_DS(ON) vs. temperature stability, gate charge (Q_g = 13.9nC), avalanche energy rating (E_AR = 67mJ), and TO252 thermal performance (R_θJC = 2.1°C/W).

Technical Context

This MOSFET employs planar silicon process technology optimized for high-voltage operation with low specific on-resistance and controlled body diode recovery (t_RR = 212ns @ 25°C). Its gate threshold voltage (V_GS(TH) = 2–4V) enables reliable turn-on with standard 10V gate drivers while maintaining noise immunity.

The device features low input capacitance (C_iss = 351pF) and reverse transfer capacitance (C_rss = 1.1pF), supporting fast switching in hard-switched topologies. Thermal design is enabled by its low junction-to-case resistance and compatibility with FR-4 PCB layouts using 1-inch² copper pads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	700V - Withstands full mains-referenced DC bus in 230VAC offline applications without derating.
R_DS(ON)	1.25Ω @ V_GS = 10V, I_D = 2.5A - Enables <1.2W conduction loss at 3.9A, suitable for thermally constrained DPAK layouts.
Q_g	13.9nC - Low total gate charge reduces driver power demand and switching transition time in 65–100kHz SMPS designs.
E_AR	67mJ - Confirmed unclamped inductive switching capability supports ruggedness in transformer-coupled circuits with leakage energy.
t_RR	212ns @ T_J = 25°C - Fast body diode recovery minimizes switching losses and voltage overshoot during synchronous rectification or freewheeling.
R_θJC	2.1°C/W - Enables direct heatsink mounting via exposed drain pad for >20W power dissipation in compact industrial adapters.

Pinout & Package

Package: TO252 (DPAK), surface-mount, with exposed drain pad for thermal conduction and mechanical anchoring. Molded green compound, RoHS-compliant matte tin finish on copper leadframe.

Pin/Terminal	Circuit Role	Design Meaning
Gate (G)	Control terminal	Low-input-capacitance node (C_iss = 351pF) requiring ≤10V drive; gate resistance R_G = 3.5Ω limits ringing in high-dv/dt environments.
Source (S)	Reference node for gate drive and current return	Common source configuration enables standard high-side or low-side switch layout; low-inductance connection critical for EMI control.
Drain (D)	High-voltage power output terminal	Exposed metal pad electrically connected to drain; must be routed to primary-side ground plane with minimum trace length for safe 700V isolation.

Key Features

Feature	Design Value
100% UIS tested in production	Guarantees avalanche ruggedness up to 67mJ per pulse-no screening failure risk in inductive load transients.
Low C_rss (1.1pF)	Minimizes Miller-induced false turn-on during high dv/dt switching, enabling stable operation without active Miller clamp.
Halogen- and antimony-free "Green" construction	Meets IPC-1752A material declaration requirements (<900ppm Br/Cl, <1000ppm Sb) for automotive and industrial compliance.
Moisture sensitivity Level 1	Eliminates bake preconditioning before reflow; compatible with standard J-STD-020 assembly processes.

Applications

AC-DC Flyback Adapters

Industrial DC-DC Converters

Use Scenario: 230VAC-input, 36W isolated flyback converter powering industrial sensors and PLC I/O modules.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer across transformer; operates at 65kHz with discontinuous conduction mode.

Use Value: 700V BVDSS provides 2× safety margin over 400V DC bus; 1.25Ω R_DS(ON) keeps conduction loss below 1.5W at full load.

Use Scenario: 48V-to-12V isolated half-bridge DC-DC module for factory automation controllers.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier MOSFET replacing Schottky diode; driven by transformer-coupled gate signal.

Use Value: Body diode t_RR = 212ns prevents cross-conduction loss; low Q_g enables clean turn-off timing with minimal dead-time penalty.

LED Driver Power Stages

UPS Backup Inverters

Use Scenario: Constant-current LED driver for high-bay lighting operating from 120/230VAC mains with PFC front-end.

IC Role / Device Role / Timing Role: High-side switch in buck-boost or SEPIC topology regulating LED string current at 100kHz.

Use Value: Low C_iss/C_oss ratio improves efficiency above 90%; TO252 thermal pad dissipates 1.8W under 3.9A continuous LED load.

Use Scenario: 1200VA line-interactive UPS with bidirectional DC-link switching between battery and inverter stages.

IC Role / Device Role / Timing Role: DC-link switch isolating battery bank during grid-connected operation; rated for 700V transient surges.

Use Value: 100% UIS qualification ensures reliability during lightning-induced line spikes; R_θJC = 2.1°C/W supports forced-air cooling at 2.5A RMS.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage N-channel MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP7NK70ZFP	Higher R_DS(ON) (1.4Ω), lower Q_g (11nC), same 700V rating, TO220FP package	Requires heatsink mounting; unsuitable for space-constrained DPAK layouts	Select when board-level thermal management allows through-hole mounting and lower gate drive loss is prioritized.
FQP7N70C	Same R_DS(ON) (1.25Ω), higher Q_g (22nC), no production UIS test, TO220 package	Lacks avalanche ruggedness validation; not recommended for inductive loads with unknown energy content	Choose only for non-inductive, low-energy switching where cost is critical and surge immunity is externally managed.

Compared with STP7NK70ZFP and FQP7N70C, DMJ7N70SK3-13 delivers superior thermal performance in surface-mount form factor, verified avalanche capability for field reliability, and balanced gate charge for efficient 65–100kHz operation-making it optimal for compact, high-reliability offline power supplies.

Availability

DMJ7N70SK3-13 is available at Aetrix Electronics and suitable for AC-DC adapters, industrial DC-DC converters, and LED driver power stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for DMJ7N70SK3-13 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.

This MOSFET belongs to Diodes' high-voltage power transistor product line, engineered specifically for energy-efficient offline power conversion in industrial, computing, and lighting applications demanding ruggedness and thermal efficiency.

FAQ

What is the maximum continuous drain current at 100°C case temperature?

The DMJ7N70SK3-13 supports 2.5A continuous drain current at T_C = +100°C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limitations of the TO252 package under sustained high-temperature operation without forced cooling.

Does this MOSFET have a built-in body diode, and what is its forward voltage?

Yes, it integrates a parasitic body diode with typical forward voltage V_SD = 0.9V at I_S = 5A and V_GS = 0V. The diode exhibits t_RR = 212ns at 25°C and 251ns at 150°C, confirming suitability for freewheeling in hard-switched topologies.

Is the DMJ7N70SK3-13 suitable for use in a ZVS or resonant LLC converter?

No-it is optimized for hard-switched applications. Its C_oss = 66pF and lack of specified zero-voltage switching parameters indicate it is not characterized for resonant operation; use dedicated superjunction or RF MOSFETs instead.

What is the gate threshold voltage range, and how does it vary with temperature?

V_GS(TH) ranges from 2.0V to 4.0V at 25°C, with typical value 2.9V. As shown in Figure 8, it decreases linearly to ~2.2V at 150°C, ensuring consistent turn-on behavior across industrial temperature ranges without requiring gate voltage adjustment.

DMJ7N70SK3-13 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:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 700 V

Current - Continuous Drain (Id) @ 25°C:: 3.9A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 1.25Ohm @ 2.5A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 13.9 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 351 pF @ 50 V

FET Feature:: -

Power Dissipation (Max):: 28W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252-3

DMJ7N70SK3-13 FAQ

1.How can I place an order for DMJ7N70SK3-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for DMJ7N70SK3-13 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 DMJ7N70SK3-13 reliable?

The price and inventory of DMJ7N70SK3-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMJ7N70SK3-13 is usually 5 days.

3.What payment methods are accepted for DMJ7N70SK3-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMJ7N70SK3-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DMJ7N70SK3-13?

DMJ7N70SK3-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DMJ7N70SK3-13 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 DMJ7N70SK3-13?

For technical support, including DMJ7N70SK3-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMJ7N70SK3-13 requirements.

6.How does Aetrix verify that DMJ7N70SK3-13 is sourced from the original manufacturer or authorized distributors?

All DMJ7N70SK3-13 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 DMJ7N70SK3-13 meets industry standards.

7.What is the process for return or replacement of DMJ7N70SK3-13?

All DMJ7N70SK3-13 units undergo pre-shipment inspection (PSI). If there is an issue with DMJ7N70SK3-13, 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 DMJ7N70SK3-13 part is unused and in its original packaging.

Return procedure for DMJ7N70SK3-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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