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

Renesas 2SK3402-AZ

Name: 2SK3402-AZ
Brand: Renesas
SKU: 2SK3402-AZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SK3402-AZ

Manufacturer:: Renesas

Category:: FETs, MOSFETs

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

Datasheet:: 2SK3402-AZ.pdf

Description:: 2SK3402-AZ - SWITCHING N-CHANNEL

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Product details

Overview

2SK3402-AZ from Renesas Electronics is an N-channel power MOSFET designed for high-current DC-DC converter primary-side switching and motor drive half-bridge applications, featuring R_DS(on) = 15 mΩ max at V_GS = 10 V / I_D = 18 A, 60 V V_DSS, and built-in gate protection diode in TO-252 (MP-3Z) package.

For engineers reviewing the 2SK3402-AZ datasheet, 2SK3402-AZ pinout, 2SK3402-AZ application, or 2SK3402-AZ equivalent, this page delivers verified electrical specs, thermal derating curves, avalanche energy rating (E_AS = 123 mJ), switching timing (t_d(off) = 170 ns), and body diode recovery (Q_rr = 89 nC) - all critical for hard-switched industrial power stage design.

Technical Context

The 2SK3402-AZ employs a planar vertical DMOS structure optimized for low conduction loss and fast switching in unidirectional high-pulse-current topologies. Its gate threshold voltage V_GS(off) ranges 1.5–2.5 V, enabling robust turn-on with standard 5 V or 10 V gate drivers while maintaining low leakage (I_DSS ≤ 10 μA).

It supports single-pulse avalanche operation up to I_AS = 35 A at T_ch = 25°C with E_AS = 123 mJ, and exhibits C_iss = 3200 pF (typ), C_oss = 520 pF (typ), and Q_G = 61 nC (typ) - parameters directly defining gate drive power and snubber requirements in flyback or synchronous rectifier circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	60 V - Maximum blocking voltage for 24/48 V bus systems with 20% margin
R_DS(on)1	15 mΩ max @ V_GS = 10 V, I_D = 18 A - Enables ≤0.5 W conduction loss at 18 A DC
I_D(DC)	±36 A @ T_C = 25°C - Supports high-current motor phase legs without forced cooling
E_AS	123 mJ - Allows safe clamping of inductive kickback in relay or solenoid drive
Q_G	61 nC - Determines minimum gate driver peak current (e.g., ≥3 A for 20 ns rise time)
t_r/t_f	310 ns / 180 ns - Defines switching transition losses and EMI filter sizing
V_F(S-D)	1.0 V @ I_F = 36 A - Low forward drop reduces reverse-recovery losses in freewheeling paths

Pinout & Package

2SK3402-AZ uses TO-252 (MP-3Z) surface-mount package with exposed drain pad for thermal enhancement. Pin 1 = Gate, Pin 2 = Drain (connected to fin), Pin 3 = Source.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control electrode	Receives gate drive signal; requires external series resistor (RG) to control dV/dt and oscillation
2 (Drain)	High-side current output	Connected to PCB copper pour for heat dissipation; electrically tied to metal fin
3 (Source)	Reference node	Serves as return path for load current and gate drive reference; must be low-inductance layout

Key Features

Feature	Design Value
Low R_DS(on) at 4 V gate drive	R_DS(on)2 = 22 mΩ max enables logic-level compatibility with microcontroller GPIOs
Built-in gate protection diode	ESD-rated diode between gate and source prevents damage during handling and board assembly
High avalanche ruggedness	Single-pulse I_AS = 35 A ensures reliability in inductive load switching without external snubbers
Low input capacitance	C_iss = 3200 pF minimizes gate drive power and improves high-frequency efficiency
Fast body diode recovery	Q_rr = 89 nC and t_rr = 48 ns reduce cross-conduction losses in synchronous rectification

Applications

DC-DC Converter Primary Switch	Motor Drive Half-Bridge
Use Scenario: High-efficiency 48 V input buck converter delivering 20 A to FPGA core rail. IC Role / Device Role / Timing Role: Main switching transistor in non-synchronous step-down topology operating at 250 kHz. Use Value: 15 mΩ R_DS(on) limits conduction loss to 5.4 W at full load, while 123 mJ E_AS absorbs transformer leakage energy during turn-off.	Use Scenario: 24 V brushed DC motor controller with PWM speed regulation. IC Role / Device Role / Timing Role: High-side switch in H-bridge configuration driving 30 A peak motor current. Use Value: 36 A DC rating and 144 A pulse capability handle motor stall currents; low Q_G enables clean 20 kHz PWM edges without shoot-through risk.
Industrial Relay Driver	Power Supply OR-ing Circuit
Use Scenario: Solid-state replacement for 24 V AC/DC control relays in PLC output modules. IC Role / Device Role / Timing Role: Unidirectional switch controlling 10 A inductive coil with flyback suppression. Use Value: Built-in avalanche rating eliminates need for external TVS; 1.0 V body diode drop reduces power dissipation during coil de-energization.	Use Scenario: Redundant 12 V power supply combining using ideal diode architecture. IC Role / Device Role / Timing Role: Reverse-polarity protected, low-loss pass element replacing Schottky diode. Use Value: 15 mΩ R_DS(on) cuts forward voltage drop to 0.15 V at 10 A - 60% lower loss than 0.4 V Schottky - improving system efficiency and thermal margin.

DC-DC Converter Primary Switch

Motor Drive Half-Bridge

Use Scenario: High-efficiency 48 V input buck converter delivering 20 A to FPGA core rail.

IC Role / Device Role / Timing Role: Main switching transistor in non-synchronous step-down topology operating at 250 kHz.

Use Value: 15 mΩ R_DS(on) limits conduction loss to 5.4 W at full load, while 123 mJ E_AS absorbs transformer leakage energy during turn-off.

Use Scenario: 24 V brushed DC motor controller with PWM speed regulation.

IC Role / Device Role / Timing Role: High-side switch in H-bridge configuration driving 30 A peak motor current.

Use Value: 36 A DC rating and 144 A pulse capability handle motor stall currents; low Q_G enables clean 20 kHz PWM edges without shoot-through risk.

Industrial Relay Driver

Power Supply OR-ing Circuit

Use Scenario: Solid-state replacement for 24 V AC/DC control relays in PLC output modules.

IC Role / Device Role / Timing Role: Unidirectional switch controlling 10 A inductive coil with flyback suppression.

Use Value: Built-in avalanche rating eliminates need for external TVS; 1.0 V body diode drop reduces power dissipation during coil de-energization.

Use Scenario: Redundant 12 V power supply combining using ideal diode architecture.

IC Role / Device Role / Timing Role: Reverse-polarity protected, low-loss pass element replacing Schottky diode.

Use Value: 15 mΩ R_DS(on) cuts forward voltage drop to 0.15 V at 10 A - 60% lower loss than 0.4 V Schottky - improving system efficiency and thermal margin.

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
IRFZ44NPBF	V_DSS = 55 V, R_DS(on) = 28 mΩ @ 10 V, TO-220 package	Lacks avalanche rating; higher R_DS(on) increases conduction loss by 87%	Acceptable only in non-avalanche-critical 24 V systems with heatsink allowance
STP60NF06	V_DSS = 60 V, R_DS(on) = 14 mΩ @ 10 V, TO-220 package	Higher Q_G = 85 nC increases gate drive demand; no specified E_AS	Preferred for low-R_DS(on) needs but requires stronger gate driver and external avalanche protection

Compared with IRFZ44NPBF and STP60NF06, the 2SK3402-AZ uniquely combines TO-252 surface-mount compatibility, guaranteed 123 mJ avalanche energy, and sub-20 mΩ on-resistance - making it optimal for space-constrained industrial power stages where reliability under transient overloads is mandatory.

Availability

2SK3402-AZ is available at Aetrix Electronics and suitable for industrial motor drives, DC-DC converters, relay drivers, and redundant power OR-ing circuits requiring stable component supply across multi-year production cycles.

Supply support for 2SK3402-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 specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The 2SK3402-AZ belongs to Renesas' legacy power MOSFET product line targeting high-reliability switching in factory automation, power supplies, and motor control - emphasizing ruggedness, thermal stability, and ease of gate drive integration.

FAQ

What is the maximum continuous drain current rating for the 2SK3402-AZ at case temperature 100°C?

The 2SK3402-AZ has a DC drain current rating of ±36 A at T_C = 25°C. At T_C = 100°C, derating applies: from the datasheet's "Total Power Dissipation vs. Case Temperature" curve, PT drops to ~22 W; using R_DS(on) = 15 mΩ, the corresponding I_D(DC) is approximately ±24 A. This value must be validated with actual PCB thermal design for the TO-252 footprint.

Does the 2SK3402-AZ have a specified avalanche energy rating, and how is it tested?

Yes, the 2SK3402-AZ specifies E_AS = 123 mJ (single-pulse) with test conditions: V_DD = 30 V, R_G = 25 Ω, V_GS = 20 → 0 V, starting T_ch = 25°C. This rating is measured per JEDEC JESD24-1 and confirms the device can safely absorb inductive energy without failure - critical for relay and solenoid drive applications.

Can the 2SK3402-AZ be driven directly by a 3.3 V microcontroller GPIO without a level shifter?

No. While the 2SK3402-AZ conducts at V_GS ≥ 4.0 V (R_DS(on)2 = 22 mΩ max), a 3.3 V GPIO cannot reliably achieve full enhancement. Gate threshold V_GS(off) is 1.5–2.5 V, but 3.3 V yields significantly higher R_DS(on) and increased switching losses. A dedicated gate driver or level-shifting circuit is required for robust operation.

What is the purpose of the internal gate-to-source diode shown in the equivalent circuit diagram of the 2SK3402-AZ?

The internal gate-to-source diode in the 2SK3402-AZ serves as an ESD protection element, clamping electrostatic discharge transients during handling and assembly. However, the datasheet explicitly states that external gate protection remains necessary if voltages exceeding ±20 V are expected - the diode is not rated for sustained overvoltage or repetitive surge events.

How does the body diode performance of the 2SK3402-AZ compare to discrete Schottky diodes in freewheeling applications?

The 2SK3402-AZ body diode has V_F(S-D) = 1.0 V at 36 A and t_rr = 48 ns, which is slower and higher-drop than typical Schottky diodes (e.g., 0.4–0.6 V, <10 ns). However, its integrated nature eliminates layout parasitics and enables synchronous rectification when actively controlled - unlike passive Schottky, which always conducts. For high-frequency freewheeling, external Schottky remains superior; for controlled commutation, the 2SK3402-AZ offers system-level integration benefits.

2SK3402-AZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 36A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4V, 10V

Rds On (Max) @ Id, Vgs:: 15mOhm @ 18A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 61 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 3200 pF @ 10 V

FET Feature:: -

Power Dissipation (Max):: 1W (Ta), 40W (Tc)

Operating Temperature:: 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (MP-3Z)

2SK3402-AZ FAQ

1.How can I place an order for 2SK3402-AZ through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SK3402-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 2SK3402-AZ reliable?

The price and inventory of 2SK3402-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK3402-AZ is usually 5 days.

3.What payment methods are accepted for 2SK3402-AZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK3402-AZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SK3402-AZ?

2SK3402-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SK3402-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 2SK3402-AZ?

For technical support, including 2SK3402-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK3402-AZ requirements.

6.How does Aetrix verify that 2SK3402-AZ is sourced from the original manufacturer or authorized distributors?

All 2SK3402-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 2SK3402-AZ meets industry standards.

7.What is the process for return or replacement of 2SK3402-AZ?

All 2SK3402-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 2SK3402-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 2SK3402-AZ part is unused and in its original packaging.

Return procedure for 2SK3402-AZ:

1.Submit a request within 90 days.

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

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