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STMicroelectronics STW18NK80Z
- Part No.:
- STW18NK80Z
- Manufacturer:
- STMicroelectronics
- Category:
- FETs, MOSFETs
- Package:
- TO-247-3
- Datasheet:
-
STW18NK80Z.pdf
- Description:
- MOSFET N-CH 800V 19A TO247-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,018
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Product details
Overview
STW18NK80Z from STMicroelectronics is an N-channel 800 V, 0.34 Ω (typ), 19 A SuperMESH™ Power MOSFET in TO-247 package, featuring integrated gate-source Zener protection, 100% avalanche tested operation, and 4.5 V/ns dv/dt capability-designed for high-voltage switching in offline SMPS and industrial motor drives.
For engineers reviewing the STW18NK80Z datasheet, STW18NK80Z pinout, STW18NK80Z application, or STW18NK80Z equivalent, key selection criteria include its 800 V VDSS, 350 W Ptot, 0.34 Ω RDS(on), 192 nC Qg, and built-in Zener-protected gate-critical for robustness in flyback, PFC, and half-bridge topologies.
Technical Context
This MOSFET employs ST's optimized strip-based SuperMESH™ layout to simultaneously minimize RDS(on) and intrinsic capacitances (Ciss = 6100 pF, Coss = 500 pF) while maintaining high dv/dt immunity (4.5 V/ns) and avalanche ruggedness (EAS = 700 mJ).
Its gate-source Zener diodes (BVGSO = 30 V) provide bidirectional transient suppression without external components, and its SOA is validated up to 19 A continuous at TC = 25°C with 0.36 °C/W Rthj-case thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 800 V - supports primary-side switching in universal-input 85–265 VAC offline converters |
| RDS(on) | 0.34 Ω (typ) at VGS = 10 V - enables low conduction loss at 19 A ID |
| ID (cont) | 19 A at TC = 25°C - defines maximum continuous current under heatsink-cooled conditions |
| Ptot | 350 W at TC = 25°C - sets thermal power handling limit before derating (2.4 W/°C) |
| Qg | 192 nC - determines gate drive power requirement and switching speed in hard-switched topologies |
| EAS | 700 mJ - quantifies unclamped inductive switching energy tolerance without failure |
| dv/dt | 4.5 V/ns - ensures immunity to parasitic turn-on in high-noise, fast-rising voltage environments |
Pinout & Package
TO-247 package: isolated tab (drain), three-leaded through-hole outline with standard mechanical dimensions per ST's ECOPACK® specification (lead-free, JEDEC-compliant). Thermal pad is electrically connected to drain.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Drain (Tab) | Main high-voltage current path | Electrically connected to metal tab; requires insulating mounting hardware when not referenced to chassis ground |
| Source | Reference node for gate control and current return | Low-impedance connection point for gate driver return and sense resistor placement |
| Gate | Control terminal for channel modulation | Protected by integrated back-to-back Zener diodes (±30 V breakdown); sensitive to ESD (6 kV HBM) |
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 | Every unit validated for repetitive and non-repetitive avalanche energy (IAR = 19 A, EAS = 700 mJ) |
| SuperMESH™ layout | Optimized strip geometry achieves 0.34 Ω RDS(on) while retaining high dv/dt immunity (4.5 V/ns) |
| Low Coss & Crss | 500 pF output capacitance and 100 pF reverse transfer capacitance reduce switching losses and improve EMI behavior |
| ECOPACK® compliance | Lead-free second-level interconnect meets RoHS and JEDEC JESD97 environmental requirements |
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 V DC bus with 15–20 A peak load current. Use Value: Avalanche ruggedness and 800 V rating enable reliable operation during regenerative braking transients without snubber circuits. | Use Scenario: Primary-side switch in active clamp forward or LLC resonant converter for 1 kW telecom rectifiers. IC Role / Device Role / Timing Role: Main power switch operating at 100–300 kHz with ZVS capability enabled by low Coss and Crss. Use Value: 0.34 Ω RDS(on) and 192 nC Qg support high efficiency (>94%) and minimal gate drive loss at elevated switching frequencies. |
| Offline Flyback Converters | Industrial PFC Circuits |
Use Scenario: Primary switch in universal-input (85–265 VAC), 150 W flyback for industrial PLC power supplies. IC Role / Device Role / Timing Role: Single-ended switching device subjected to high VDS spikes during demagnetization. Use Value: 4.5 V/ns dv/dt capability and integrated gate Zener prevent spurious turn-on and gate oxide damage during leakage inductance ringing. | Use Scenario: Boost switch in continuous conduction mode (CCM) PFC front-end for factory automation equipment. IC Role / Device Role / Timing Role: High-voltage, high-current switch operating at 65–100 kHz with 19 A average current demand. Use Value: 350 W power dissipation rating and 0.36 °C/W Rthj-case allow stable thermal performance under full-load, high-temperature ambient conditions. |
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 |
|---|---|---|---|
| STW20NK80Z | Higher RDS(on) (0.38 Ω typ), identical VDSS and package | Slightly lower conduction efficiency at high ID; same avalanche rating and SOA | Preferred where cost sensitivity outweighs marginal RDS(on) penalty |
| IPP80N06S2L-05 | Lower VDSS (60 V), much lower RDS(on) (5.5 mΩ), different package (TO-220FP) | Not suitable for >100 V applications; incompatible voltage class and thermal profile | Only viable in low-voltage, high-current DC-DC stages-not a functional substitute |
Compared with STW20NK80Z, STW18NK80Z offers lower conduction loss and tighter RDS(on) distribution; compared with IPP80N06S2L-05, it provides essential 800 V isolation and avalanche safety for AC-line-connected systems-making it irreplaceable in offline power conversion.
Availability
STW18NK80Z is available at Aetrix Electronics and suitable for industrial motor drives, telecom SMPS, offline flyback converters, and industrial PFC circuits requiring stable component supply despite its obsolete status-supported via legacy inventory and controlled lifecycle sourcing.
Supply support for STW18NK80Z 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 industrial, automotive, and consumer markets.
The SuperMESH™ MOSFET product line targets high-efficiency, high-reliability switching in 600–1000 V applications-including SMPS, lighting ballasts, and motor controls-by optimizing RDS(on), dv/dt immunity, and avalanche robustness in a single platform.
FAQ
Is STW18NK80Z still in active production?
No-STW18NK80Z is marked as obsolete by STMicroelectronics (Rev 4, October 2006). However, Aetrix Electronics maintains verified legacy stock with full traceability, documentation, and extended lifecycle support for ongoing production programs requiring this specific device.
Can STW18NK80Z be used in place of STW20NK80Z?
Yes-STW18NK80Z is a direct upgrade to STW20NK80Z with identical pinout, package (TO-247), and voltage rating (800 V), but delivers lower RDS(on) (0.34 Ω vs. 0.38 Ω) and improved gate charge (192 nC vs. 210 nC), enabling higher efficiency and faster switching in existing designs.
What is the maximum safe operating temperature for STW18NK80Z?
The maximum junction temperature is 150°C, with storage temperature rated from –55°C to +150°C. At TC = 100°C, the continuous drain current derates to 12 A, and thermal resistance junction-to-case is 0.36 °C/W-requiring adequate heatsinking to maintain reliability under sustained 350 W dissipation.
Does STW18NK80Z require external gate protection?
No-STW18NK80Z integrates back-to-back gate-source Zener diodes (BVGSO = 30 V) that clamp transient overvoltage and enhance ESD robustness (6 kV HBM), eliminating the need for external gate protection components in most standard switching applications.
STW18NK80Z 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):
- 800 V
- Current - Continuous Drain (Id) @ 25°C:
- 19A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 380mOhm @ 10A, 10V
- Vgs(th) (Max) @ Id:
- 4.5V @ 150µA
- Gate Charge (Qg) (Max) @ Vgs:
- 250 nC @ 10 V
- Vgs (Max):
- ±30V
- Input Capacitance (Ciss) (Max) @ Vds:
- 6100 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
STW18NK80Z FAQ
1.How can I place an order for STW18NK80Z through Aetrix?
Please submit a Request for Quotation (RFQ) for STW18NK80Z 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 STW18NK80Z reliable?
The price and inventory of STW18NK80Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STW18NK80Z is usually 5 days.
3.What payment methods are accepted for STW18NK80Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STW18NK80Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STW18NK80Z?
STW18NK80Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STW18NK80Z 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 STW18NK80Z?
For technical support, including STW18NK80Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STW18NK80Z requirements.
6.How does Aetrix verify that STW18NK80Z is sourced from the original manufacturer or authorized distributors?
All STW18NK80Z 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 STW18NK80Z meets industry standards.
7.What is the process for return or replacement of STW18NK80Z?
All STW18NK80Z units undergo pre-shipment inspection (PSI). If there is an issue with STW18NK80Z, 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 STW18NK80Z part is unused and in its original packaging.
Return procedure for STW18NK80Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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