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

STMicroelectronics STW18NK60Z

Name: STW18NK60Z
Brand: STMicroelectronics
SKU: STW18NK60Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STW18NK60Z

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-247-3

Datasheet:: STW18NK60Z.pdf

Description:: MOSFET N-CH 600V 16A TO247-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STW18NK60Z from STMicroelectronics is an N-channel 600 V, 0.27 Ω (typ), 16 A (TC = 25°C) SuperMESH™ power MOSFET in TO-247 package, featuring integrated gate-source Zener protection, 100% avalanche tested, and optimized for high-speed, high-current switching in offline SMPS primary-side circuits.

For engineers reviewing the STW18NK60Z datasheet, STW18NK60Z pinout, STW18NK60Z application, or STW18NK60Z equivalent, key selection criteria include R_DS(on) at 10 V drive, dv/dt capability (4.5 V/ns), unclamped inductive avalanche rating (E_AS = 400 mJ), gate charge (Q_g = 106 nC), and thermal resistance (R_thj-case = 0.54 °C/W).

Technical Context

This MOSFET employs ST's strip-based SuperMESH™ layout to minimize R_DS(on) while preserving robust dv/dt immunity-critical for hard-switched flyback and resonant converters. Its built-in back-to-back gate-source Zener diodes (V_Z = 30 V) suppress transients without external clamps.

The device delivers low intrinsic capacitances (C_iss = 3540 pF, C_oss = 370 pF, C_rss = 80 pF) and fast switching (t_d(on) = 34 ns, t_f = 47 ns) under 4.7 Ω gate drive, enabling high-frequency operation up to 100 kHz with reduced switching losses.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	600 V - supports 400 V AC mains input with 50% safety margin in offline PSUs
R_DS(on) (typ)	0.27 Ω @ V_GS = 10 V - enables <1.7 W conduction loss at 8 A DC current
I_D (cont)	16 A @ T_C = 25°C - suitable for 200–300 W primary-side switch applications
E_AS	400 mJ - withstands single-pulse inductive energy without failure in unclamped switching
dv/dt	4.5 V/ns - prevents spurious turn-on during fast voltage transients in high-noise environments
Q_g	106 nC - determines gate driver power requirement and switching speed trade-off
R_thj-case	0.54 °C/W - allows 230 W dissipation with ≤124°C junction rise above 25°C case temperature

Pinout & Package

TO-247 package: 3-terminal through-hole metal-can housing with isolated tab (drain-connected). Mounting surface must be electrically insulated unless drain is referenced to heatsink potential.

Pin/Terminal	Circuit Role	Design Meaning
1 (Source)	Power return path for load current	Low-inductance connection point for source loop minimization in high-di/dt layouts
2 (Gate)	Control terminal for channel modulation	Requires low-impedance gate driver path; protected by integrated 30 V Zener clamp
3 (Drain)	Main high-voltage power terminal	Internally connected to metal tab; electrically tied to heatsink in standard mounting

Key Features

Feature	Design Value
Zener-protected gate	Integrated 30 V back-to-back Zeners eliminate need for external gate clamping components
100% avalanche tested	Each unit validated for repetitive I_AR = 16 A and E_AS = 400 mJ at T_j = 25°C
SuperMESH™ layout	Reduces R_DS(on) by >25% vs prior PowerMESH™ generation while maintaining dv/dt immunity
Low C_oss & C_rss	C_oss = 370 pF and C_rss = 80 pF reduce Miller effect and improve hard-switching efficiency
High ESD rating	V_ESD(G-S) = 6000 V (HBM) ensures robustness during PCB handling and assembly

Applications

AC-DC Adapter Primary Switch

Server PSU Half-Bridge Leg

Use Scenario: 65–120 W universal-input flyback converter operating at 65 kHz.

IC Role / Device Role / Timing Role: Main high-side switching element controlling energy transfer from primary to secondary winding.

Use Value: Low R_DS(on) reduces conduction loss; Zener protection avoids gate oxide stress from transformer leakage spikes.

Use Scenario: 500 W telecom-grade half-bridge forward converter with active clamp.

IC Role / Device Role / Timing Role: High-voltage leg switch handling 400 V DC bus with synchronous rectification timing constraints.

Use Value: 4.5 V/ns dv/dt rating prevents false triggering during cross-conduction transitions; 100% avalanche test ensures reliability under short-circuit events.

Industrial Motor Drive Inverter

LED Streetlight Driver

Use Scenario: 3 kW three-phase inverter feeding PMSM motor with 10 kHz PWM carrier.

IC Role / Device Role / Timing Role: Upper-leg IGBT replacement in 600 V class inverter stage requiring fast turn-off and low tail current.

Use Value: Fast fall time (47 ns) and low Q_gd/Q_g ratio (52%) enable clean commutation and reduced shoot-through risk.

Use Scenario: 150 W constant-current LED driver using asymmetric half-bridge topology.

IC Role / Device Role / Timing Role: High-side switch regulating bulk capacitor discharge into LED string via resonant tank.

Use Value: Low C_oss (370 pF) minimizes capacitive losses during zero-voltage switching transitions; 230 W P_TOT supports high ambient temperature operation.

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
STW20NK60Z	R_DS(on) = 0.25 Ω (typ), I_D = 20 A, Q_g = 115 nC - slightly lower on-resistance but higher gate charge	Better conduction efficiency at >12 A load; less suitable for ultra-fast switching due to higher Q_g	Select when thermal margin is constrained and gate drive strength permits higher Q_g.
FQP19N60C	R_DS(on) = 0.23 Ω (typ), no integrated Zener, E_AS = 320 mJ - lower R_DS(on) but requires external gate protection	Lower BOM cost in volume production where board space allows discrete Zener placement	Choose only if external gate clamping is already implemented and avalanche margin is verified.

Compared with STW20NK60Z and FQP19N60C, STW18NK60Z offers optimal balance of Zener integration, avalanche ruggedness, and gate drive compatibility-making it preferred for cost-sensitive, high-reliability offline power supplies without added protection circuitry.

Availability

STW18NK60Z is available at Aetrix Electronics and suitable for AC-DC adapters, server power supplies, industrial motor drives, and LED streetlight drivers requiring stable component supply across multi-year production cycles.

Supply support for STW18NK60Z 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 analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The SuperMESH™ MOSFET product line targets high-efficiency, high-reliability offline power conversion-specifically engineered to replace legacy planar devices in 500–650 V SMPS topologies.

FAQ

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

The STW18NK60Z supports 10 A continuous drain current at T_C = 100°C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limits of the TO-247 package and silicon die; operation above this current requires forced cooling or pulse-width limitation to maintain junction temperature below 150°C.

Does STW18NK60Z require external gate protection?

No. The device integrates back-to-back Zener diodes between gate and source with a breakdown voltage of 30 V, providing inherent protection against gate overvoltage transients. External clamping is unnecessary unless system-level transients exceed ±30 V or ESD exposure exceeds HBM 6 kV.

Can STW18NK60Z be used in synchronous rectification configurations?

No. As an N-channel high-side switch with fixed threshold voltage (V_GS(th) = 3–4.5 V), it lacks the bidirectional conduction and low forward voltage characteristics required for synchronous rectifier operation. It is designed exclusively for unidirectional high-voltage switching in primary-side applications.

What is the safe operating area (SOA) limitation for pulsed drain current?

The pulsed drain current (I_DM) is rated at 64 A, limited by SOA constraints: pulse width ≤300 µs, duty cycle ≤1.5%, and V_DD ≤600 V. Exceeding these conditions risks thermal runaway or second breakdown, especially at elevated case temperatures above 25°C.

STW18NK60Z 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:: 16A (Tc)

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

Rds On (Max) @ Id, Vgs:: 360mOhm @ 8A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 100µA

Gate Charge (Qg) (Max) @ Vgs:: 170 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 3540 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 230W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

STW18NK60Z FAQ

1.How can I place an order for STW18NK60Z through Aetrix?

Please submit a Request for Quotation (RFQ) for STW18NK60Z 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 STW18NK60Z reliable?

The price and inventory of STW18NK60Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STW18NK60Z is usually 5 days.

3.What payment methods are accepted for STW18NK60Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STW18NK60Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STW18NK60Z?

STW18NK60Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STW18NK60Z 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 STW18NK60Z?

For technical support, including STW18NK60Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STW18NK60Z requirements.

6.How does Aetrix verify that STW18NK60Z is sourced from the original manufacturer or authorized distributors?

All STW18NK60Z 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 STW18NK60Z meets industry standards.

7.What is the process for return or replacement of STW18NK60Z?

All STW18NK60Z units undergo pre-shipment inspection (PSI). If there is an issue with STW18NK60Z, 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 STW18NK60Z part is unused and in its original packaging.

Return procedure for STW18NK60Z:

1.Submit a request within 90 days.

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

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