STW12NK95Z - 950V 10A Zener SuperMESH MOSFET | STMicroelectronics
MPN: STW12NK95Z ✓ NakahandaSTW12NK95Z Ulas
A Power MOSFET is a type of field-effect transistor optimized for high power and high voltage switching. It operates by controlling the conductivity between the drain and source terminals through an insulated gate voltage. Power MOSFETs are essential components in power electronics, serving as switches in power supplies, inverters, and motor drives. They belong to the broader discrete semiconductor family, alongside diodes, IGBTs, and thyristors.
Key features include Zener protection, which safeguards the gate oxide from overvoltage transients, and minimized gate charge for faster switching and reduced drive losses. The device is 100% avalanche tested, ensuring ruggedness under inductive load conditions, and offers extremely high dv/dt capability for reliable fast-switching operation.
The SuperMESH technology, an evolution of ST's strip-based PowerMESH layout, significantly reduces on-resistance while maintaining high breakdown voltage. This results in lower conduction losses and improved efficiency, while minimized gate charge enables higher frequency operation and smaller magnetic components.
Typical applications include switch-mode power supplies (SMPS), power factor correction (PFC) circuits, high-voltage DC-DC converters, and lighting systems where efficiency and reliability are critical.
When designing with this device, ensure a proper gate drive voltage (typically 10V) to fully enhance the channel and minimize conduction losses, and provide adequate heatsinking since the device can dissipate up to 230W at maintained case temperature.
Mga alternatibo na pwedeng ilagay na STW12NK95Z — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok STW12NK95Z (parehas na form factor at footprint) — pagkakaiba sa Package.
STW11NK90Z
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →STW11NK100Z
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
STW12NK90Z
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
FQH8N100C
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
IXFH10N100
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
STW12NK95Z Mga Pinakamataas na Rating at Electrical Characteristics
| Polarity | N-Channel |
| Drain-Source Breakdown Voltage (Vdss) | 950 V |
| Continuous Drain Current (Id) at Tc | 10 A |
| On-Resistance (Rds on) Max | 0.90 ohm |
| On-Resistance (Rds on) Typ | 0.69 ohm |
| Power Dissipation (Pd) at Tc | 230 W |
| Technology | SuperMESH (Zener-protected PowerMESH) |
| Gate Protection | Zener-protected gate oxide |
| Avalanche Rating | 100% avalanche tested |
| Uri ng Pagpapasok | Through Hole |
| Packhaging | TO-247-3 |
| Temperature na Operasyon | -55C to +150C (junction) |
Pin Configuration ng STW12NK95Z
| Pin 1 | Gate — Gate terminal (Zener-protected relative to source) |
| Pin 2 | Drain — Drain terminal, connected to metal tab |
| Pin 3 | Source — Source terminal, reference for gate drive |
Ligtas na Operating Area
Tipikal na mga Gamit
STW12NK95Z ay nararapat para sa 6 aplikasyons: Switch-Mode Power Supplies (SMPS), Power Factor Correction (PFC), High-Voltage DC-DC Converters, Lighting Systems (HID and High-Intensity Discharge), Motor Drives and Inverters, Industrial Power Adaptors and Battery Chargers.
Switch-Mode Power Supplies (SMPS)
The STW12NK95Z suits offline SMPS primary-side switching where its 950V Vdss covers rectified 230VAC mains plus flyback leakage spikes. With 0.69 ohm typical Rds(on) and minimized gate charge, it balances conduction and switching losses at 65-150 kHz switching frequencies. The Zener-protected gate tolerates ringing transients common in flyback and forward topologies, improving field reliability.
Inirekomenda
Power Factor Correction (PFC)
In boost-type PFC stages operating from universal or 230VAC mains, the switch sees bus voltage near 400V plus high-frequency ripple; the 950V rating of the STW12NK95Z provides generous margin. Its 10A continuous rating and 230W dissipation capability at controlled case temperature support several hundred watts of PFC throughput, while avalanche ruggedness absorbs inductor current transients during startup and load steps.
Inirekomenda
High-Voltage DC-DC Converters
For isolated DC-DC converters fed from high-voltage DC buses (e.g., 400V industrial links), the STW12NK95Z provides the primary-side switch function. Its low 0.69 ohm typical Rds(on) limits conduction loss at 10A load currents, while minimized gate charge enables hard- or soft-switched operation with reduced drive power. The through-hole TO-247-3 package eases thermal design with bolt-on heatsinks in industrial converters.
Inirekomenda
Lighting Systems (HID and High-Intensity Discharge)
HID lamp ballasts and high-power LED drivers running from rectified mains require switches rated above 600V. The STW12NK95Z's 950V breakdown and Zener gate protection handle ignition-pulse transients typical in discharge-lamp ignition circuits. Its 100% avalanche testing adds robustness against the inductive kick of ballast transformers, supporting reliable long-life operation in industrial and street-lighting ballast designs.
Inirekomenda
Motor Drives and Inverters
In high-voltage DC bus motor drives and small inverter stages, the STW12NK95Z operates as a hard-switched or resonant power switch. Its extremely high dv/dt capability prevents false turn-on from bus transients, and the 10A continuous rating covers fractional-horsepower motor currents. TO-247 mounting allows direct attachment to the drive heatsink; use a Kelvin source connection and negative gate drive to improve dv/dt immunity.
Inirekomenda
Industrial Power Adaptors and Battery Chargers
High-power adaptors and industrial battery chargers with 230VAC input need a primary switch with wide voltage margin. The STW12NK95Z's 950V rating covers input surges, and its low gate charge reduces no-load standby losses critical for efficiency regulations. The Zener gate clamp protects against transformer leakage-induced gate spikes, reducing external protection component count in cost-sensitive charger designs.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for STW12NK95Z — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | STW11NK90Z | STW11NK100Z | STW12NK90Z | FQH8N100C | IXFH10N100 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | onsemi | IXYS |
| Package | TO-247-3 | TO-247-3 - same | TO-247-3 - same | TO-247-3 - same | TO-247-3 - same | TO-247-3 - same |
| Vdss Breakdown Voltage | 950 V | 900 V | 1000 V | 900 V | 1000 V | 1000 V |
| Continuous Drain Current | 10 A (Tc) | 11 A | 11 A | 12 A | 8 A | 10 A |
| Gate Zener Protection | Yes | Yes | Yes | Yes | No (verify datasheet) | No (verify datasheet) |
| Technology | SuperMESH | SuperMESH | SuperMESH | SuperMESH | QFET | HEXFRET/planar |
Pangunahing mga Pagkakaiba
- Higher voltage margin than 900V family members (kumpara saSTW11NK90Z)
- Lower cost than 1000V variants for adequate margin (kumpara saSTW11NK100Z)
- Higher current rating than cross-brand alternative (kumpara saFQH8N100C)
Talaan ng Disenyo
At full 10A load with high Rds(on), conduction losses can reach I^2 x R of roughly 69-90W; with switching losses this approaches the 230W Tc rating only with an efficient heatsink keeping case temperature well below 150C. Size the heatsink so Tj stays under 125C with margin; use thermal grease and a calibrated TO-247 mounting screw torque per the ST datasheet mechanical section.
Keep the gate drive loop short: place the gate driver and series gate resistor close to the TO-247 gate pin, and use a Kelvin source return to minimize common-source inductance-induced false turn-on. A 5 to 22 ohm external gate resistor controls switching speed; add a 10k-20k gate-to-source pulldown resistor to prevent floating-gate turn-on during power-up.
Do not rely on the internal Zener clamp as the primary gate overvoltage protection in every design - it is a last-line protection. Ensure drain voltage ringing from transformer leakage inductance stays below 950V with snubbers or RCD clamps; repetitive avalanche beyond the rated energy degrades reliability despite the 100% avalanche test screening.
Impormasyon ng Pagsunod sa Kautusan
Compliance status not stated in provided data; check STMicroelectronics product page for RoHS/REACH certificates.
