STW12NK80Z STMicroelectronics MOSFET (N-Channel) (Transistor Outline, Vertical) In Stock
STMicroelectronics STW12NK80Z is an 800 V N-channel power MOSFET in TO-247 package with 10.5 A drain current and 0.75 Ω Rds(on). Features 400 mJ avalanche energy rating. Available from stock worldwide.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- STW12NK80Z Datasheet PDF
- Category
- MOSFET (N-Channel)
- Price
- From $1.9280(MOQ 1)
- Temp Range
- ?°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 800 V drain-source breakdown voltage enabling safe operation in high-voltage flyback, PFC, and half-bridge converter topologies
- 10.5 A continuous drain current with 0.75 Ω max Rds(on) balancing conduction loss and voltage handling in a through-hole TO-247AC package
- 400 mJ avalanche energy rating (Eas) providing robust unclamped inductive switching ruggedness for inductive motor and transformer loads
Applications
The STW12NK80Z is designed for high-voltage power conversion applications including offline flyback SMPS, boost PFC stages, and half-bridge inverters operating from rectified 230 VAC or 400 V DC bus. Its 800 V rating and 400 mJ avalanche energy make it suitable for motor drive snubberless designs where inductive kickback must be safely absorbed by the MOSFET itself. The TO-247 through-hole package allows bolted attachment to a heatsink, facilitating thermal management in industrial inverters and EV charger onboard chargers.
Specifications
| Factory Lead Time | 16Weeks |
| YTEOL | 6.4 |
| Avalanche Energy Rating (Eas) | 400mJ |
| Configuration | SINGLE WITH BUILT-IN DIODE |
| DS Breakdown Voltage-Min | 800V |
| Drain Current-Max (ID) | 10.5A |
| Drain-source On Resistance-Max | 0.75Ω |
| FET Technology | METAL-OXIDE SEMICONDUCTOR |
| JEDEC-95 Code | TO-247AC |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Operating Mode | ENHANCEMENT MODE |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Polarity/Channel Type | N-CHANNEL |
| Power Dissipation-Max (Abs) | 190W |
| Pulsed Drain Current-Max (IDM) | 42A |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Transistor Application | SWITCHING |
| Transistor Element Material | SILICON |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What drain current and on-resistance does the STW12NK80Z provide at 10A operation?
The STW12NK80Z is rated for 10.5 A continuous drain current with a maximum Rds(on) of 0.75 Ω at Vgs = 10 V. At 10 A, the conduction loss is approximately 75 W, requiring heatsinking to maintain junction temperature below 150°C in continuous operation at full load.
How does the 400 mJ avalanche energy rating of the STW12NK80Z benefit snubberless flyback converter designs?
In a snubberless flyback design, the STW12NK80Z must absorb the transformer leakage inductance energy at every switching cycle. With a 400 mJ Eas rating, it safely handles leakage spikes from transformers with up to several hundred µH of leakage inductance at switching currents of 10 A without avalanche breakdown, eliminating the need for an RC or transient voltage suppressor snubber network.
For a 300 W PFC boost stage running from 85 VAC to 265 VAC, why is the 800 V rating of the STW12NK80Z appropriate?
Rectified 265 VAC produces approximately 375 V DC bus. With PFC boost overshoot and line transients, the switch node can spike to 550 V to 650 V. The STW12NK80Z's 800 V breakdown provides a 150 V to 250 V margin above worst-case transients, meeting IEC 61000-4-5 surge immunity requirements without exceeding the device's safe operating area.
How does the TO-247 package of the STW12NK80Z simplify thermal management compared to a D2PAK SMD alternative?
The TO-247AC package allows direct mounting to an external aluminium heatsink with a single bolt, achieving junction-to-case thermal resistance (Rth,JC) of approximately 0.5°C/W. This enables dissipation of over 100 W at 25°C ambient with a standard 1°C/W heatsink, whereas a D2PAK soldered to a PCB is typically limited to 30 W to 50 W without additional thermal vias and copper pours.
Related Guides
How to Choose a USB Controller: Certification, Integration, and SDK Quality Compared Across Microchip, STMicroelectronics, NXP, TI, and Renesas
Compare USB controllers from Microchip, STM, NXP, TI, and Renesas across certification difficulty, integration ease, and documentation/SDK quality to choose the right IC for your design.
May 28, 2026
ADAU1361BCPZ Application Note: Audio Codec Design Guide for Embedded Systems
Complete design guide for the ADAU1361BCPZ stereo 96kHz/24-bit audio codec: power supply filtering, PLL startup sequence, PCB layout, SigmaDSP integration, and troubleshooting.
May 28, 2026
LM66100QDCKRQ1 Design Guide: Ideal Diode and Reverse Polarity Protection for Automotive Power Rails
Complete application note for the LM66100QDCKRQ1 AEC-Q100 ideal diode controller: PMOS selection, threshold tuning, RPP integration, layout, and automotive design pitfalls.
May 28, 2026
LM2904BQDGKRQ1 Selection Guide: Automotive Dual Op-Amp Variants, Packages, and Alternatives
How to choose the right LM2904BQ automotive dual op-amp variant: AEC-Q100 grade, offset voltage, package, and non-automotive alternatives explained.
May 27, 2026
Why Buy from FindMyChip
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.
More from STMicroelectronics
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $5.9400 | $5.94 |
| 10+ | $4.1400 | $41.40 |
| 100+ | $3.4700 | $347.00 |
| 120+ | $1.9672 | $236.06 |
| 510+ | $1.9474 | $993.17 |
| 1020+ | $1.9280 | $1966.56 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”