W12NK95Z STMicroelectronics MOSFET (N-Channel) (Transistor Outline, Vertical) In Stock
STMicroelectronics W12NK95Z is an N-channel SuperMESH Power MOSFET in TO-247 package rated at 950 V and 10 A with 0.69 Ω on-resistance. Features integrated Zener protection for enhanced gate-source ruggedness in high-voltage switching applications. Designed for power factor correction, flyback converters, and industrial motor drive circuits requiring robust high-voltage performance.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- W12NK95Z Datasheet PDF
- Category
- MOSFET (N-Channel)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 950 V breakdown voltage with 0.69 Ω on-resistance (Rds(on)) and 10 A continuous drain current for high-voltage power switching efficiency
- Integrated Zener gate-source protection diode providing enhanced ruggedness against electrostatic discharge and voltage transients in industrial environments
- SuperMESH technology reducing switching losses and improving efficiency in high-frequency power conversion topologies up to hundreds of kHz
Applications
The W12NK95Z is designed for high-voltage power conversion applications including flyback converters, power factor correction stages, and LLC resonant converters in industrial power supplies and white goods. Its 950 V rating and 0.69 Ω on-resistance support efficient switching in AC-DC converters operating from universal mains input. The TO-247 package provides good thermal management for motor drives and UPS systems requiring 10 A continuous drain current at high ambient temperatures.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for W12NK95Z:
Frequently Asked Questions
What are the key electrical ratings of the STMicroelectronics W12NK95Z MOSFET?
The W12NK95Z is an N-channel MOSFET with a 950 V drain-source breakdown voltage, 10 A continuous drain current, and 0.69 Ω typical on-resistance (Rds(on)). These ratings make it well suited for high-voltage switching applications in flyback converters and PFC circuits operating from mains supply.
How does the integrated Zener protection in W12NK95Z improve reliability in industrial power designs?
The internal Zener diode clamps the gate-source voltage to protect the gate oxide from electrostatic discharge and voltage spikes during switching transients. This integrated protection eliminates the need for an external gate protection Zener in the 950 V circuit, reducing component count and improving system reliability in harsh industrial environments with high-voltage transients.
For which high-voltage converter topologies is the TO-247 packaged W12NK95Z most appropriate?
The W12NK95Z in TO-247 package is most appropriate for flyback converters, LLC resonant converters, and boost PFC stages in industrial power supplies handling 110 V to 230 V AC mains input. The TO-247 package provides a low thermal resistance to heatsink, supporting 10 A operation with adequate cooling in high-power designs with 950 V switching requirements.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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