STW12NK95Z - 950V 10A N-Channel MOSFET | STMicroelectronics
MPN: STW12NK95Z ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
Drop-in alternatives for STW12NK95Z — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STW12NK90Z
✅ Drop-In📋 Reference alternative (not in catalog)
STW11NK100Z
✅ Drop-In📋 Reference alternative (not in catalog)
STW9N150
✅ Drop-In📋 Reference alternative (not in catalog)
STW6N120K3
✅ Drop-In📋 Reference alternative (not in catalog)
STW12NK95Z Maximum Ratings & Electrical Characteristics
| Polarity | N-Channel |
| Drain-Source Voltage (VDS) | 950 V |
| Continuous Drain Current (ID) | 10 A (Tc) |
| Power Dissipation (PD) | 230 W (Tc) |
| On-Resistance (RDS(on)) | 0.69 Ω typical, 0.90 Ω max |
| Gate-Source Voltage (VGS) | ±30 V |
| Gate Charge (Qg) | [DATA_NEEDED: Gate Charge (Qg)] |
| Input Capacitance (Ciss) | [DATA_NEEDED: Input Capacitance (Ciss)] |
| Avalanche Energy (EAS) | 100% avalanche tested |
| dv/dt Capability | Extremely high |
| Package | TO-247-3 |
| Mounting Type | Through Hole |
| Operating Temperature Range | [DATA_NEEDED: Operating Temperature Range] |
| RoHS Status | Compliant |
| Lead-Free | Yes |
STW12NK95Z Pin Configuration
| Pin 1 | Gate — Gate terminal for controlling the MOSFET |
| Pin 2 | Drain — Drain terminal, connected to the tab |
| Pin 3 | Source — Source terminal |
Safe Operating Area
Typical Applications
STW12NK95Z is suitable for 6 applications: Switch-Mode Power Supplies (SMPS), Power Factor Correction (PFC), High-Voltage DC-DC Converters, Lighting Systems, Motor Drives, Renewable Energy Inverters.
Switch-Mode Power Supplies (SMPS)
The STW12NK95Z is ideal for SMPS due to its 950V VDS and low on-resistance (0.69Ω). It can handle high voltage inputs and switch efficiently at high frequencies, reducing power losses. The minimized gate charge enables faster switching, improving overall efficiency. In a typical flyback or forward converter, the MOSFET acts as the primary switch, controlling power transfer. Its high avalanche ruggedness ensures reliability during transient overvoltages.
Recommended
Power Factor Correction (PFC)
In PFC circuits, the STW12NK95Z's high voltage rating (950V) and low on-resistance (0.69Ω) minimize conduction losses, improving efficiency. The device's fast switching capability, enabled by minimized gate charge, allows operation at high frequencies, reducing the size of magnetic components. Its Zener protection prevents gate oxide damage, enhancing reliability in harsh environments. The 100% avalanche testing ensures robustness during load transients.
Recommended
High-Voltage DC-DC Converters
The STW12NK95Z is well-suited for high-voltage DC-DC converters, such as those in solar inverters or electric vehicle chargers. Its 950V VDS allows it to handle high input voltages, while the low on-resistance reduces conduction losses. The device's high dv/dt capability ensures reliable operation in fast-switching topologies. The TO-247 package provides excellent thermal performance, enabling high power density designs.
Recommended
Lighting Systems
In high-power LED lighting and HID ballasts, the STW12NK95Z provides efficient switching with its low on-resistance and high voltage rating. The minimized gate charge reduces switching losses, enabling high-frequency operation and smaller passive components. The device's ruggedness, including 100% avalanche testing, ensures long-term reliability in demanding lighting applications. Its TO-247 package allows easy mounting on heatsinks.
Recommended
Motor Drives
The STW12NK95Z can be used in motor drive inverters for industrial and automotive applications. Its high voltage rating (950V) is suitable for 3-phase AC motor drives operating from rectified mains. The low on-resistance minimizes conduction losses, improving efficiency. The device's fast switching and high dv/dt capability enable precise motor control. The TO-247 package supports high power dissipation with proper heatsinking.
Recommended
Renewable Energy Inverters
In solar and wind inverters, the STW12NK95Z handles high DC bus voltages (up to 950V) and switches efficiently to convert DC to AC. Its low on-resistance reduces losses, improving overall system efficiency. The device's ruggedness, including avalanche capability, ensures reliability under varying load conditions. The TO-247 package allows for effective thermal management in high-power designs.
Recommended
Recommended Products Summary
Engineering reference data for STW12NK95Z — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STW12NK90Z | STW11NK100Z | STW9N150 | STW6N120K3 |
|---|---|---|---|---|---|
| Package | TO-247-3 | TO-247-3 | TO-247-3 | TO-247-3 | TO-247-3 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Drain-Source Voltage (VDS) | 950 V | 900 V | 1000 V | 1500 V | 1200 V |
| Continuous Drain Current (ID) | 10 A | 10 A | 11 A | 9 A | 6 A |
| On-Resistance (RDS(on)) | 0.69 Ω | 0.69 Ω | 0.75 Ω | 1.5 Ω | 1.8 Ω |
| Power Dissipation (PD) | 230 W | 230 W | 230 W | 230 W | 230 W |
| Gate Charge (Qg) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Avalanche Rated | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Higher voltage rating than STW12NK90Z (vs STW12NK90Z)
- Lower on-resistance than STW11NK100Z (vs STW11NK100Z)
- Higher current rating than STW9N150 (vs STW9N150)
Design Notes
The STW12NK95Z can dissipate up to 230W at Tc=25°C. In high-power applications, ensure adequate heatsinking to keep the junction temperature below the maximum rating. Use thermal interface material and consider forced air cooling if necessary. The TO-247 package has a low thermal resistance, but proper mounting is critical.
For high-voltage switching, keep the gate drive loop short and use a gate resistor to damp oscillations. Place a 100nF ceramic capacitor close to the gate-source pins to suppress noise. Ensure adequate creepage and clearance distances on the PCB for 950V operation.
Do not exceed the maximum VGS rating of ±30V. Use a gate driver with appropriate voltage levels. Also, ensure the device is not operated beyond the SOA, especially during switching transients. The Zener protection helps, but external clamping may be needed for inductive loads.
Compliance Information
RoHS compliant per datasheet. Lead-free second level interconnect per JEDEC JESD97.
