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

STMicroelectronics STW28NK60Z

Name: STW28NK60Z
Brand: STMicroelectronics
SKU: STW28NK60Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STW28NK60Z

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-247-3

Datasheet:: STW28NK60Z.pdf

Description:: MOSFET N-CH 600V 27A TO247-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,678

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Product details

Overview

STW28NK60Z from STMicroelectronics is an N-channel 600 V, 27 A, 0.155 Ω R_DS(on) SuperMESH™ power MOSFET in TO-247 package, featuring integrated gate-source Zener protection, 4.5 V/ns dv/dt capability, and 500 mJ single-pulse avalanche energy. It serves as a high-reliability primary-side switching device in offline AC-DC power supplies operating up to 350 W.

For engineers reviewing the STW28NK60Z datasheet, STW28NK60Z pinout, STW28NK60Z application, or STW28NK60Z equivalent, key selection criteria include its 600 V blocking voltage, low gate charge (189 nC), robust avalanche rating, Zener-protected gate, and thermal resistance of 0.36 °C/W - all critical for high-efficiency, high-reliability SMPS designs.

Technical Context

This MOSFET employs ST's optimized strip-based SuperMESH™ layout to simultaneously minimize R_DS(on) (0.155 Ω typ.) and intrinsic capacitances (C_iss = 6350 pF, C_oss = 615 pF), enabling fast switching with reduced switching losses. Its gate threshold voltage (3–4.5 V) and forward transconductance (26 S) support stable drive under wide temperature and load conditions.

The integrated back-to-back gate-source Zener diodes (±30 V breakdown) provide ESD immunity (6 kV HBM) and transient overvoltage clamping without external components. Avalanche ruggedness is validated per I_AR = 27 A and E_AS = 500 mJ at T_j = 25 °C, supporting unclamped inductive switching in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	600 V - supports universal-input offline SMPS with margin above 400 V DC bus
R_DS(on)	0.155 Ω (typ.) - enables low conduction loss at 27 A continuous drain current
I_D (T_C = 25°C)	27 A - rated for high-power primary-side switching with heatsink mounting
Q_g	189 nC - determines gate driver power requirement and switching speed trade-off
E_AS	500 mJ - ensures reliable operation during unclamped inductive turn-off events
dv/dt	4.5 V/ns - suppresses false triggering in noisy high-voltage environments
R_thj-case	0.36 °C/W - enables thermal design with predictable junction-to-heatsink temperature rise

Pinout & Package

Supplied in TO-247 package with isolated tab (drain-connected), standard three-terminal configuration: Pin 1 = Gate, Pin 2 = Drain (tab), Pin 3 = Source.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Gate)	Control input	Receives 10 V logic-level drive; protected by integrated ±30 V Zener clamp
Pin 2 (Drain)	High-voltage power output	Connected to internal die backside; electrically tied to metal tab for thermal conduction
Pin 3 (Source)	Power return / reference node	Serves as common reference for gate drive and current sensing; low-inductance path critical for EMI control

Key Features

Feature	Design Value
Zener-protected gate	Integrated ±30 V gate-source Zener diodes eliminate need for external TVS, reducing BOM count and PCB area
100% avalanche tested	Each unit validated for repetitive and non-repetitive avalanche stress up to 27 A, ensuring field reliability
Minimized gate charge	189 nC total gate charge enables efficient driving with standard 1–2 A gate drivers at 100 kHz+ switching
Extremely high dv/dt capability	4.5 V/ns rating prevents spurious turn-on during fast voltage transients in bridge-leg configurations
Low intrinsic capacitances	C_iss = 6350 pF and C_rss = 125 pF reduce Miller effect and improve switching controllability

Applications

Switch-Mode Power Supplies

Industrial Welding Equipment

Use Scenario: Primary-side switch in 300–350 W universal-input flyback and LLC resonant converters.

IC Role / Device Role / Timing Role: High-voltage, high-current switching element controlling energy transfer from AC line to isolated DC output.

Use Value: 0.155 Ω R_DS(on) and 500 mJ E_AS enable >90% efficiency and robust fault tolerance without snubbers.

Use Scenario: Inverter leg switch in IGBT-gated arc welding inverters operating at 20–50 kHz.

IC Role / Device Role / Timing Role: Fast-turning main power switch handling pulsed 100+ A peak currents with tight dead-time control.

Use Value: 4.5 V/ns dv/dt rating and low Q_gd/Q_gs ratio ensure clean commutation and minimal shoot-through risk.

LED Driver Systems

High-Voltage DC-DC Converters

Use Scenario: Primary switch in constant-current LED drivers for street lighting (230 V AC input, 40–100 V DC output).

IC Role / Device Role / Timing Role: Hard-switched PWM controller delivering regulated current to high-power LED strings.

Use Value: Zener-protected gate withstands gate ringing from long PCB traces; 27 A I_D supports >150 W LED loads.

Use Scenario: Step-up switch in industrial 48 V to 400 V DC-DC boost converters for battery charging systems.

IC Role / Device Role / Timing Role: High-duty-cycle power switch managing continuous 20+ A conduction with low conduction loss.

Use Value: 0.36 °C/W R_thj-case and 350 W P_TOT allow stable operation at full load with passive heatsinking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STW34NB20	200 V V_DSS, 34 A I_D, 0.055 Ω R_DS(on) - lower voltage rating, higher current	Not suitable for 600 V offline applications; limited to <250 V DC bus systems	Select only for low-voltage, high-current DC-DC where 600 V blocking is unnecessary
IPP60R190C7	650 V V_DSS, 21 A I_D, 0.190 Ω R_DS(on), CoolMOS™ C7 - lower Q_g (72 nC), no integrated Zener	Requires external gate protection; better for high-frequency ZVS/ZCS topologies	Prefer when switching frequency >200 kHz and external gate clamping is acceptable

Compared with STW34NB20 and IPP60R190C7, STW28NK60Z uniquely combines 600 V rating, integrated Zener protection, and proven avalanche ruggedness - making it optimal for cost-sensitive, reliability-critical offline SMPS where gate protection and fault tolerance are mandatory.

Availability

STW28NK60Z is available at Aetrix Electronics and suitable for offline power supplies, industrial welding inverters, LED driver systems, and high-voltage DC-DC converters requiring stable component supply and long-term production continuity.

Supply support for STW28NK60Z 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The SuperMESH™ MOSFET product line targets high-efficiency, high-reliability power conversion in offline AC-DC, motor drives, and industrial power supplies - emphasizing ruggedness, low R_DS(on), and integrated protection.

FAQ

Is STW28NK60Z still in active production?

No - STW28NK60Z is marked as Obsolete in ST's official documentation (Rev. 1, Nov. 2004). While not actively manufactured, Aetrix Electronics maintains legacy inventory and offers traceable, tested units for ongoing production support and repair programs.

What is the maximum safe operating temperature for continuous operation?

The maximum operating junction temperature is 150 °C. At T_C = 100 °C, the continuous drain current is derated to 17 A. Thermal design must ensure R_thj-case ≤ 0.36 °C/W and maintain T_j ≤ 150 °C under worst-case ambient and power dissipation conditions.

Can STW28NK60Z be used without an external gate resistor?

No - an external gate resistor (typically 4.7–22 Ω) is required to dampen ringing, control switching speed, and limit peak gate current. The datasheet specifies switching times using R_G = 4.7 Ω; omitting it risks oscillation, EMI, and gate oxide overstress.

Does the built-in Zener protect against negative gate voltage transients?

Yes - the integrated back-to-back Zener diodes provide symmetrical clamping at ±30 V between gate and source, protecting against both positive and negative transients, including ESD (6 kV HBM) and inductive gate spikes during high-di/dt switching.

STW28NK60Z Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH™

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 600 V

Current - Continuous Drain (Id) @ 25°C:: 27A (Tc)

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

Rds On (Max) @ Id, Vgs:: 185mOhm @ 13.5A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 150µA

Gate Charge (Qg) (Max) @ Vgs:: 264 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 6350 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 350W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

STW28NK60Z FAQ

1.How can I place an order for STW28NK60Z through Aetrix?

Please submit a Request for Quotation (RFQ) for STW28NK60Z 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 STW28NK60Z reliable?

The price and inventory of STW28NK60Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STW28NK60Z is usually 5 days.

3.What payment methods are accepted for STW28NK60Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STW28NK60Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STW28NK60Z?

STW28NK60Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STW28NK60Z 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 STW28NK60Z?

For technical support, including STW28NK60Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STW28NK60Z requirements.

6.How does Aetrix verify that STW28NK60Z is sourced from the original manufacturer or authorized distributors?

All STW28NK60Z 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 STW28NK60Z meets industry standards.

7.What is the process for return or replacement of STW28NK60Z?

All STW28NK60Z units undergo pre-shipment inspection (PSI). If there is an issue with STW28NK60Z, 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 STW28NK60Z part is unused and in its original packaging.

Return procedure for STW28NK60Z:

1.Submit a request within 90 days.

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

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