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

Renesas 2SK3793-AZ

Name: 2SK3793-AZ
Brand: Renesas
SKU: 2SK3793-AZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SK3793-AZ

Manufacturer:: Renesas

Category:: FETs, MOSFETs

Package:: TO-220-3 Isolated Tab

Datasheet:: 2SK3793-AZ.pdf

Description:: MOSFET N-CH 100V 12A TO220

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Product details

Overview

2SK3793-AZ from Renesas Electronics is an N-channel power MOSFET designed for high-current DC switching in industrial power supplies and motor control circuits. It delivers R_DS(on) = 125 mΩ max at V_GS = 10 V / I_D = 6 A, supports 100 V V_DSS, and handles ±12 A DC drain current with built-in gate protection diode.

For engineers reviewing the 2SK3793-AZ datasheet, 2SK3793-AZ pinout, 2SK3793-AZ application, or 2SK3793-AZ equivalent, key selection criteria include avalanche energy rating (E_AS = 10 mJ), low input capacitance (C_iss = 900 pF typ), gate charge (Q_G = 21 nC), and isolated TO-220 thermal performance (R_th(ch-C) = 6.25 °C/W).

Technical Context

This discrete power switch operates in enhancement-mode with gate threshold voltage V_GS(off) = 1.5–2.5 V and exhibits forward transfer admittance |y_fs| = 10.3 S at I_D = 6 A. Its body diode enables synchronous rectification in flyback and buck converters, with V_F(S-D) = 0.89–1.5 V at I_F = 12 A and t_rr = 52 ns.

The device is rated for single-pulse avalanche operation at I_AS = 10 A and E_AS = 10 mJ under defined test conditions (V_DD = 50 V, R_G = 25 Ω, T_ch = 25 °C). Switching times are optimized for hard-switched topologies: t_d(on) = 9 ns, t_r = 5 ns, t_d(off) = 30 ns, t_f = 4 ns.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	100 V - Maximum blocking voltage in off-state; suitable for 48 V bus systems with safety margin.
R_DS(on)1	125 mΩ max at V_GS = 10 V / I_D = 6 A - Low conduction loss enabling <1.5 W dissipation at 6 A DC.
I_D(DC)	±12 A at T_C = 25 °C - Continuous current capability limited by package thermal resistance (6.25 °C/W).
C_iss	900 pF typ at V_DS = 10 V - Enables fast switching with moderate gate drive strength (Q_G = 21 nC).
E_AS	10 mJ - Specifies single-pulse avalanche energy handling for inductive load turn-off stress.
T_ch max	150 °C - Maximum channel temperature; derating required above T_C = 25 °C per published curves.
Q_GD	6.2 nC - Gate-to-drain charge determining Miller plateau duration during switching transitions.

Pinout & Package

2SK3793-AZ uses an isolated TO-220 (MP-45F) package with electrically isolated drain tab, enabling direct heatsink mounting without insulating hardware. Thermal resistance from channel to case is 6.25 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control electrode	Receives voltage-controlled signal; requires external gate resistor (RG) for dV/dt control and oscillation suppression.
2 (Drain)	High-side current path	Electrically isolated metal tab; connects to high-voltage rail and heatsink; must be insulated from chassis if not referenced to ground.
3 (Source)	Reference node	Serves as return path for load current and gate drive reference; ties to power ground or floating node depending on topology.

Key Features

Feature	Design Value
Super low R_DS(on)	125 mΩ max at 10 V gate drive reduces conduction losses in 6–12 A power stages.
Built-in gate protection diode	ESD protection between gate and source prevents damage from static discharge during handling and assembly.
Low C_iss and Q_G	900 pF input capacitance and 21 nC total gate charge enable efficient 100–500 kHz switching with standard gate drivers.
Avalanche-rated operation	10 mJ single-pulse avalanche energy allows reliable operation under inductive switching stress without snubber circuits.
Body diode with fast recovery	52 ns reverse recovery time and 94 nC Q_rr support moderate-frequency freewheeling in non-synchronous converters.

Applications

DC Motor Drive	Industrial Power Supply
Use Scenario: Driving brushed DC motors in factory automation actuators requiring bidirectional PWM control at 24–48 V bus. IC Role / Device Role / Timing Role: High-side or low-side switching element controlling motor current flow and direction via gate voltage polarity and duty cycle. Use Value: Low R_DS(on) minimizes heat generation during continuous 10 A operation; avalanche rating absorbs back-EMF spikes during abrupt current interruption.	Use Scenario: Primary-side switching in offline 100–200 W AC/DC adapters and industrial auxiliary power supplies. IC Role / Device Role / Timing Role: Main power switch in flyback or forward converter topologies operating at 65–130 kHz. Use Value: Fast switching (t_f = 4 ns) and low Q_GD reduce transition losses; isolated TO-220 simplifies heatsinking in compact enclosures.
LED Constant-Current Driver	DC-DC Buck Converter
Use Scenario: High-power LED string regulation in commercial lighting fixtures with 36–72 V input and 2–5 A output. IC Role / Device Role / Timing Role: Synchronous rectifier or main switch in constant-current buck or boost LED driver circuits. Use Value: Body diode VF = 0.89 V reduces forward drop in non-synchronous designs; low C_oss = 110 pF improves light-load efficiency.	Use Scenario: Step-down conversion in programmable lab power supplies delivering 5–24 V at up to 12 A. IC Role / Device Role / Timing Role: High-current power switch in multiphase or single-phase buck regulator stage. Use Value: ±12 A DC rating and 20 W power dissipation (T_C = 25 °C) support sustained high-current output without forced air cooling.

DC Motor Drive

Industrial Power Supply

Use Scenario: Driving brushed DC motors in factory automation actuators requiring bidirectional PWM control at 24–48 V bus.

IC Role / Device Role / Timing Role: High-side or low-side switching element controlling motor current flow and direction via gate voltage polarity and duty cycle.

Use Value: Low R_DS(on) minimizes heat generation during continuous 10 A operation; avalanche rating absorbs back-EMF spikes during abrupt current interruption.

Use Scenario: Primary-side switching in offline 100–200 W AC/DC adapters and industrial auxiliary power supplies.

IC Role / Device Role / Timing Role: Main power switch in flyback or forward converter topologies operating at 65–130 kHz.

Use Value: Fast switching (t_f = 4 ns) and low Q_GD reduce transition losses; isolated TO-220 simplifies heatsinking in compact enclosures.

LED Constant-Current Driver

DC-DC Buck Converter

Use Scenario: High-power LED string regulation in commercial lighting fixtures with 36–72 V input and 2–5 A output.

IC Role / Device Role / Timing Role: Synchronous rectifier or main switch in constant-current buck or boost LED driver circuits.

Use Value: Body diode VF = 0.89 V reduces forward drop in non-synchronous designs; low C_oss = 110 pF improves light-load efficiency.

Use Scenario: Step-down conversion in programmable lab power supplies delivering 5–24 V at up to 12 A.

IC Role / Device Role / Timing Role: High-current power switch in multiphase or single-phase buck regulator stage.

Use Value: ±12 A DC rating and 20 W power dissipation (T_C = 25 °C) support sustained high-current output without forced air cooling.

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
STP12NK100Z	1000 V V_DSS, 12 A I_D, R_DS(on) = 0.75 Ω - higher voltage rating but significantly higher on-resistance.	Designed for high-voltage PFC and industrial inverters; unsuitable for low-loss 48 V switching where 2SK3793-AZ excels.	Select when >600 V blocking is required; avoid for 100 V-class efficiency-critical designs.
IRF540N	100 V V_DSS, 33 A I_D, R_DS(on) = 44 mΩ - lower R_DS(on) but no specified avalanche energy rating.	General-purpose switching; lacks documented E_AS specification, limiting use in unclamped inductive loads.	Prefer for high-current, low-R_DS(on) needs where avalanche robustness is secondary; verify layout for higher peak currents.

Compared with STP12NK100Z and IRF540N, the 2SK3793-AZ offers a balanced trade-off of 100 V rating, 125 mΩ R_DS(on), and guaranteed 10 mJ avalanche energy-making it optimal for cost-sensitive, thermally constrained 48 V industrial switching where reliability under transient stress is critical.

Availability

2SK3793-AZ is available at Aetrix Electronics and suitable for industrial motor drives, offline power supplies, LED drivers, and DC-DC converters requiring stable component supply and long-term manufacturability.

Supply support for 2SK3793-AZ 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.

The 2SK3793-AZ belongs to Renesas' legacy power MOSFET product line targeting industrial-grade switching applications where ruggedness, thermal stability, and controlled avalanche behavior are essential.

FAQ

What is the maximum continuous drain current rating for the 2SK3793-AZ?

The 2SK3793-AZ is rated for ±12 A DC drain current at case temperature T_C = 25 °C. This rating assumes proper heatsinking to maintain T_C ≤ 25 °C; derating applies per the published thermal curve-e.g., ~8 A at T_C = 75 °C. The 2SK3793-AZ must not exceed its 20 W total power dissipation limit (T_C = 25 °C) or 2.0 W at ambient (T_A = 25 °C) without forced cooling.

Does the 2SK3793-AZ have a built-in body diode, and what are its key parameters?

Yes, the 2SK3793-AZ integrates a source-to-drain body diode with forward voltage V_F(S-D) = 0.89–1.5 V at I_F = 12 A and reverse recovery time t_rr = 52 ns under specified test conditions (di/dt = 100 A/µs). This diode supports freewheeling in buck and flyback converters, and its Q_rr = 94 nC impacts switching loss during turn-on. The 2SK3793-AZ body diode is not optimized for synchronous rectification but provides functional recovery in standard topologies.

What is the gate threshold voltage range for the 2SK3793-AZ, and how does it affect drive requirements?

The 2SK3793-AZ has a gate threshold voltage V_GS(off) of 1.5–2.5 V at I_D = 1 mA, confirming enhancement-mode operation. Full enhancement requires ≥4.5 V gate drive (R_DS(on)2 = 148 mΩ max), while 10 V drive achieves optimal R_DS(on)1 = 125 mΩ max. The 2SK3793-AZ is compatible with standard 5 V and 10 V logic-level gate drivers but requires careful attention to Miller plateau crossing due to Q_GD = 6.2 nC.

Is the 2SK3793-AZ suitable for avalanche-prone circuits like relay or solenoid driving?

Yes-the 2SK3793-AZ is explicitly characterized for single-pulse avalanche operation with I_AS = 10 A and E_AS = 10 mJ under defined test conditions (V_DD = 50 V, R_G = 25 Ω, T_ch = 25 °C). This makes the 2SK3793-AZ appropriate for driving inductive loads such as relays and solenoids without external snubbers, provided energy per event stays within the 10 mJ limit and pulse repetition remains low (duty cycle ≤ 1%).

What package type does the 2SK3793-AZ use, and how does its isolation benefit thermal design?

The 2SK3793-AZ uses an isolated TO-220 (MP-45F) package where the drain tab is electrically isolated from the source and gate terminals. This allows direct mounting to a common heatsink without insulating pads or washers, reducing thermal interface resistance. With R_th(ch-C) = 6.25 °C/W, the 2SK3793-AZ achieves efficient heat transfer from channel to case-critical for maintaining T_ch ≤ 150 °C in high-power industrial applications.

2SK3793-AZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: TO-220-3 Isolated Tab

Packaging:: Bulk

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 12A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 125mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: 21 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 900 pF @ 10 V

FET Feature:: -

Power Dissipation (Max):: 2W (Ta), 20W (Tc)

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220 Isolated Tab

2SK3793-AZ FAQ

1.How can I place an order for 2SK3793-AZ through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SK3793-AZ 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 2SK3793-AZ reliable?

The price and inventory of 2SK3793-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK3793-AZ is usually 5 days.

3.What payment methods are accepted for 2SK3793-AZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK3793-AZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SK3793-AZ?

2SK3793-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SK3793-AZ 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 2SK3793-AZ?

For technical support, including 2SK3793-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK3793-AZ requirements.

6.How does Aetrix verify that 2SK3793-AZ is sourced from the original manufacturer or authorized distributors?

All 2SK3793-AZ 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 2SK3793-AZ meets industry standards.

7.What is the process for return or replacement of 2SK3793-AZ?

All 2SK3793-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 2SK3793-AZ, 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 2SK3793-AZ part is unused and in its original packaging.

Return procedure for 2SK3793-AZ:

1.Submit a request within 90 days.

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

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