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STMicroelectronics STW7NK90Z
- Part No.:
- STW7NK90Z
- Manufacturer:
- STMicroelectronics
- Category:
- FETs, MOSFETs
- Package:
- TO-247-3
- Datasheet:
-
STW7NK90Z.pdf
- Description:
- MOSFET N-CH 900V 5.8A TO247-3
- Quantity:
- Payment:
- Shipping:
Inventory:54
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Product details
Overview
STW7NK90Z from STMicroelectronics is a Zener-protected N-channel SuperMESH Power MOSFET rated for 900 V drain-source voltage, 1.56 Ω typical RDS(on), and 5.8 A continuous drain current at TC = 25 °C, housed in a TO-247 package. It delivers high dv/dt capability (4.5 V/ns), 100% avalanche-tested ruggedness (EAS = 300 mJ), and low gate charge (46.5–60.5 nC), enabling reliable high-voltage switching in offline SMPS and industrial motor drives.
For engineers reviewing the STW7NK90Z datasheet, STW7NK90Z pinout, STW7NK90Z application, or STW7NK90Z equivalent, key selection criteria include its 900 V breakdown rating, thermal resistance (RthJC = 0.89 °C/W), Zener-protected gate, and verified unclamped inductive switching performance under harsh transient conditions.
Technical Context
This device implements ST's SuperMESH process - an evolution of PowerMESH - to reduce on-resistance while maintaining high voltage integrity and fast switching dynamics. Its optimized cell layout yields low intrinsic capacitance (Ciss = 1350 pF, Coss = 130 pF) and minimized gate charge, directly supporting high-frequency hard-switched topologies.
The integrated Zener diode protects the gate against overvoltage transients up to ±30 V, and its source-drain diode features 840 ns reverse recovery time (TJ = 150 °C) and 5880 nC Qrr, making it suitable for applications requiring controlled body-diode commutation without external snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 900 V - Enables direct use in 400 V AC mains-fed converters without voltage derating concerns. |
| RDS(on) typ. | 1.56 Ω - Delivers low conduction loss at 5.8 A, reducing thermal stress in high-power switch-mode stages. |
| ID cont. (TC = 25 °C) | 5.8 A - Supports sustained output power up to ~2.6 kW in properly heatsinked TO-247 configurations. |
| EAS | 300 mJ - Confirmed single-pulse avalanche energy ensures robustness during inductive turn-off faults. |
| dv/dt rating | 4.5 V/ns - Guarantees immunity to parasitic turn-on in high-noise, high-dV/dt environments like PFC and half-bridge inverters. |
| Qg | 46.5–60.5 nC - Enables efficient gate driving with standard 1–2 A peak drivers at 50–100 kHz switching frequencies. |
| RthJC | 0.89 °C/W - Allows direct mounting to large heatsinks for high-power dissipation (140 W at TC = 25 °C). |
Pinout & Package
STW7NK90Z is supplied in TO-247 package (standard 3-lead variant), with tab connected to drain for optimal thermal and electrical performance in high-voltage switching layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Lead) | Gate (G) | High-impedance control input; requires <±30 V absolute max; Zener-clamped internally. |
| 2 (Tab) | Drain (D) | Main high-voltage power terminal; electrically and thermally coupled to metal tab for low-inductance, high-current return path. |
| 3 (Lead) | Source (S) | Power return and reference node; connects to ground or low-side switch node; carries full load current and body-diode conduction. |
Key Features
| Feature | Design Value |
|---|---|
| 100% avalanche tested | Every unit validated for EAS ≥ 300 mJ - eliminates need for external avalanche derating in safety-critical designs. |
| Zener-protected gate | Integrated ±30 V clamp - removes requirement for external gate protection components in noisy industrial environments. |
| Low Coss & Crss | Coss = 130 pF, Crss = 26 pF - minimizes switching losses and improves EMI behavior in high-frequency converters. |
| SuperMESH technology | Optimized cell pitch and trench geometry - achieves 1.56 Ω RDS(on) at 900 V without compromising ruggedness or speed. |
| High dv/dt immunity | 4.5 V/ns rated - prevents false turn-on during fast voltage transients in bridge-leg configurations. |
Applications
| Industrial Motor Drives | Server & Telecom SMPS |
|---|---|
|
Use Scenario: Half-bridge inverter stage for 3-phase BLDC motor control in HVAC compressors and pumps. IC Role / Device Role / Timing Role: High-side and low-side switching element handling 400–600 V DC bus with 5–10 kHz PWM. Use Value: Avalanche ruggedness and 4.5 V/ns dv/dt rating prevent shoot-through and ensure reliable operation under load transients and phase reversal. |
Use Scenario: Primary-side switch in 1–3 kW telecom rectifiers and server PSUs operating from universal AC input. IC Role / Device Role / Timing Role: Main switching transistor in LLC resonant or hard-switched forward converter topologies. Use Value: Low Qg and Ciss enable efficient 100+ kHz operation; Zener gate protection simplifies driver design in high-isolation systems. |
| Induction Heating Systems | UPS & Energy Storage Inverters |
|
Use Scenario: Resonant tank switch in 2–5 kW domestic and light-commercial induction cooktops. IC Role / Device Role / Timing Role: Fast-switching power device in series-resonant inverter with 20–50 kHz operation and high di/dt demands. Use Value: 840 ns trr and 14 A IRRM allow clean body-diode commutation without external anti-parallel diodes. |
Use Scenario: DC-AC inverter stage in 3–10 kVA uninterruptible power supplies and battery-based solar inverters. IC Role / Device Role / Timing Role: Bridge-leg switch handling bidirectional power flow and grid-synchronization waveforms. Use Value: 900 V rating supports 800 V DC link designs; 140 W power dissipation enables compact heatsinking in space-constrained enclosures. |
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 |
|---|---|---|---|
| STP7NK90Z | Same SuperMESH die, TO-220 package, RthJC = 4.2 °C/W, PTOT = 30 W (vs. 140 W) | Limited to ≤500 W applications due to higher thermal resistance and lower power rating | Select when board space or cost constraints preclude TO-247, and thermal budget permits lower power density. |
| IPP65R095CFD7 | 650 V SiC MOSFET, RDS(on) = 0.095 Ω, Qg = 34 nC, but requires gate drive >15 V and lacks integrated Zener | Enables >200 kHz operation with lower losses, but demands redesigned gate driver and layout for SiC-specific requirements | Choose for ultra-high-efficiency, high-frequency designs where system-level efficiency gain justifies redesign effort and cost premium. |
Compared with STP7NK90Z, STW7NK90Z offers 4.7× higher power dissipation and 4.7× lower junction-to-case thermal resistance; versus IPP65R095CFD7, it trades higher conduction loss for plug-and-play compatibility with legacy silicon gate drivers and inherent transient robustness.
Availability
STW7NK90Z is available at Aetrix Electronics and suitable for industrial motor drives, telecom SMPS, UPS inverters, and induction heating systems requiring stable component supply across multi-year production cycles.
Supply support for STW7NK90Z 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, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
STW7NK90Z belongs to ST's SuperMESH Power MOSFET product line, engineered specifically for high-reliability, high-voltage switching in offline power conversion and motor control applications demanding ruggedness, low EMI, and long-term stability.
FAQ
Is STW7NK90Z pin-compatible with other TO-247 MOSFETs?
Yes - STW7NK90Z uses the standard 3-lead TO-247 mechanical outline (per Table 11), with Gate (pin 1), Drain (tab), and Source (pin 3) assignments matching JEDEC TO-247-3L conventions. No PCB footprint modification is needed when replacing functionally similar 900 V TO-247 MOSFETs.
Does STW7NK90Z require external gate protection?
No - the device integrates a Zener diode between gate and source, clamping transient voltages to ±30 V. This eliminates the need for external gate resistors, TVS diodes, or RC snubbers in most industrial applications, provided gate drive voltage remains within datasheet limits.
What is the maximum safe operating area (SOA) limitation at 100 °C case temperature?
At TC = 100 °C, the continuous drain current is derated to 3.65 A (Table 1). The SOA curve (Figure 5) confirms second breakdown limits this device to 23.2 A pulsed (IDM) only for pulse widths <10 µs - longer pulses must respect both thermal and voltage limits simultaneously.
Can STW7NK90Z be used in synchronous rectification?
No - STW7NK90Z is optimized as a high-voltage primary-side switch, not a low-side synchronous rectifier. Its body diode has relatively high VSD (1.6 V) and slow trr (840 ns), making it unsuitable for high-frequency synchronous rectification where low forward drop and fast recovery are critical.
STW7NK90Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- SuperMESH™
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 900 V
- Current - Continuous Drain (Id) @ 25°C:
- 5.8A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 2Ohm @ 2.9A, 10V
- Vgs(th) (Max) @ Id:
- 4.5V @ 100µA
- Gate Charge (Qg) (Max) @ Vgs:
- 60.5 nC @ 10 V
- Vgs (Max):
- ±30V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1350 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 140W (Tc)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247-3
STW7NK90Z FAQ
1.How can I place an order for STW7NK90Z through Aetrix?
Please submit a Request for Quotation (RFQ) for STW7NK90Z 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 STW7NK90Z reliable?
The price and inventory of STW7NK90Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STW7NK90Z is usually 5 days.
3.What payment methods are accepted for STW7NK90Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STW7NK90Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STW7NK90Z?
STW7NK90Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STW7NK90Z 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 STW7NK90Z?
For technical support, including STW7NK90Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STW7NK90Z requirements.
6.How does Aetrix verify that STW7NK90Z is sourced from the original manufacturer or authorized distributors?
All STW7NK90Z 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 STW7NK90Z meets industry standards.
7.What is the process for return or replacement of STW7NK90Z?
All STW7NK90Z units undergo pre-shipment inspection (PSI). If there is an issue with STW7NK90Z, 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 STW7NK90Z part is unused and in its original packaging.
Return procedure for STW7NK90Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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