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STMicroelectronics STP2NK90Z
- Part No.:
- STP2NK90Z
- Manufacturer:
- STMicroelectronics
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3
- Datasheet:
-
STP2NK90Z.pdf
- Description:
- MOSFET N-CH 900V 2.1A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:577
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Product details
Overview
STP2NK90Z from STMicroelectronics is a Zener-protected N-channel SuperMESH Power MOSFET rated for 900 V drain-source voltage, 4.7 Ω typical RDS(on), and 2.1 A continuous drain current at TC = 25 °C. It features 100% avalanche testing, minimized gate charge (19.5–27 nC), and high dv/dt capability (4.5 V/ns), making it suitable for high-voltage flyback and resonant converters in industrial power supplies.
For engineers reviewing the STP2NK90Z datasheet, STP2NK90Z pinout, STP2NK90Z application, or STP2NK90Z equivalent, key selection criteria include its 900 V breakdown rating, low Ciss (485 pF), Zener-protected gate, DPAK thermal resistance (RthJC = 1.78 °C/W), and unclamped inductive switching robustness (EAS = 150 mJ).
Technical Context
This device implements ST's SuperMESH process - an evolution of PowerMESH - to reduce on-resistance while maintaining high voltage ruggedness and fast switching. Its Zener-protected gate structure eliminates external gate protection components in high-noise environments.
The MOSFET delivers stable operation under harsh dv/dt stress (4.5 V/ns) and supports unclamped inductive switching with 150 mJ single-pulse avalanche energy. Its source-drain diode exhibits 1.6 V forward drop at 2.1 A and 415 ns reverse recovery time at 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 900 V - Enables direct interface with 400–800 V DC bus systems without cascading or snubbing. |
| RDS(on) max | 6.5 Ω - Limits conduction loss to ≤28.5 W at 2.1 A, supporting thermally constrained DPAK layouts. |
| Qg | 19.5–27 nC - Reduces gate drive power and enables use with low-current drivers (e.g., UC384x series). |
| Ciss | 485 pF - Minimizes Miller effect, improving noise immunity and enabling >100 kHz switching in hard-switched topologies. |
| EAS | 150 mJ - Supports reliable operation in unclamped inductive loads (e.g., relay drivers, PFC boost stages) without external clamping. |
| dv/dt | 4.5 V/ns - Withstands rapid voltage transients common in motor drives and industrial inverters without false turn-on. |
| RthJC | 1.78 °C/W - Allows ≥39 W power dissipation with 70 °C case-to-ambient delta, critical for sealed enclosure designs. |
Pinout & Package
STP2NK90Z is housed in a DPAK (TO-252) package with exposed drain tab for thermal and electrical connection. The package complies with ECOPACK environmental standards and mounts on FR-4 PCBs using standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Gate | Control terminal requiring ≤±30 V bias; integrated Zener clamp protects against ±2 kV HBM ESD events. |
| 2 (D / TAB) | Drain / Heat Sink Pad | Main high-voltage output node; electrically and thermally connected to large copper area for RthJC = 1.78 °C/W. |
| 3 (S) | Source | Reference node for gate drive; connects to ground or low-side switch node; carries full load current (2.1 A continuous). |
Key Features
| Feature | Design Value |
|---|---|
| SuperMESH process technology | Reduces RDS(on) by ~25% vs. legacy PowerMESH while preserving 900 V rating and avalanche margin. |
| Zener-protected gate | Integrated bidirectional 20 V Zener eliminates need for external gate protection in noisy industrial environments. |
| Low Coss (50 pF) | Minimizes switching loss during turn-off and improves stability in high-frequency resonant converters. |
| 100% avalanche tested | Every unit validated for 2.1 A repetitive avalanche current, ensuring field reliability in inductive fault conditions. |
| High dv/dt immunity (4.5 V/ns) | Prevents spurious turn-on during fast voltage transitions in half-bridge and LLC primary switches. |
Applications
| Industrial Flyback SMPS | AC-DC Adapter Primary Switch |
|---|---|
|
Use Scenario: 65–100 W offline flyback converter powering PLC I/O modules in factory automation. IC Role / Device Role / Timing Role: High-voltage primary-side switching element operating at 65 kHz with discontinuous conduction mode. Use Value: 900 V rating accommodates 380 V AC input surges; 150 mJ EAS absorbs leakage inductance spikes without snubber. |
Use Scenario: Universal-input (90–264 V AC) 36 W adapter for medical monitoring equipment. IC Role / Device Role / Timing Role: Primary-side MOSFET in quasi-resonant flyback topology with valley-switching control. Use Value: Low Qg (19.5–27 nC) enables efficient drive from low-power QR controller; Zener gate protection ensures EMI robustness. |
| LED Driver – Isolated Buck-Boost | Motor Control – Fan/Blower Inverter Stage |
|
Use Scenario: Constant-current LED driver for street lighting with 400 V DC bus and 120 V LED string. IC Role / Device Role / Timing Role: High-side switch in isolated buck-boost stage operating at 100 kHz. Use Value: 4.7 Ω typical RDS(on) limits conduction loss to <1.2 W at 500 mA output; low Ciss ensures clean gate waveform. |
Use Scenario: Single-phase inverter driving 24 V DC brushless fan in HVAC control panel. IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration with bootstrap gate drive. Use Value: 1.6 V source-drain diode forward voltage reduces body-diode conduction loss during dead-time; 415 ns trr minimizes shoot-through risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage N-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP2NK90ZFP | D²PAK (TO-263) package; RthJC = 1.25 °C/W; same electrical specs. | Better thermal performance in high-power density designs; requires larger PCB footprint. | Select when board space allows and junction temperature must stay below 125 °C at >35 W dissipation. |
| FQP9N90C | 900 V, 8.5 Ω RDS(on) max, no integrated gate Zener, higher Qg (35 nC). | Lacks avalanche testing and gate protection; requires external gate clamp and snubber. | Acceptable only in cost-sensitive, low-noise applications where layout controls dv/dt and ESD exposure. |
Compared with STP2NK90Z, STP2NK90ZFP offers superior thermal management but increases board area, while FQP9N90C trades ruggedness and integration for lower cost-requiring additional protection circuitry and careful layout to match reliability.
Availability
STP2NK90Z is available at Aetrix Electronics and suitable for industrial power supplies, LED drivers, and motor control circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing for Class B safety-critical designs.
Supply support for STP2NK90Z 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, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.
STP2NK90Z belongs to the SuperMESH Power MOSFET product line, engineered specifically for high-voltage, medium-current switching in offline SMPS, lighting ballasts, and industrial motor drives where ruggedness and ease of drive are critical.
FAQ
Is STP2NK90Z pin-compatible with STD2NK90ZT4?
Yes - both share identical DPAK (TO-252) pinout: Pin 1 = Gate, Pin 2 = Drain/TAB, Pin 3 = Source. Electrical specifications including VDS, RDS(on), and Qg are identical per DS4030 Rev 6. The difference lies only in packaging format (tape-and-reel vs. tube) and marking; no design change affects layout or schematic reuse.
What is the maximum safe operating area (SOA) limit at 100 °C case temperature?
At TC = 100 °C, the continuous drain current is derated to 1.3 A (per Table 1). The SOA curve (Figure 1) confirms safe operation up to 450 V × 1.3 A in DC mode, and extends to 720 V × 0.8 A for 10 ms pulses - verified by built-in avalanche capability and thermal resistance modeling.
Does STP2NK90Z require an external gate resistor for EMI suppression?
A gate resistor of 4.7 Ω is recommended (per Figure 13 test circuit) to dampen ringing caused by low Ciss/Coss ratio and minimize radiated emissions. Values below 2.2 Ω increase dv/dt-induced noise; above 10 Ω degrade switching speed and increase losses - optimal value balances EMI and efficiency per layout parasitics.
Can STP2NK90Z replace STW20NK90Z in existing designs?
No - STW20NK90Z is a TO-247 packaged 20 A device with different RDS(on) (0.42 Ω), thermal resistance (0.45 °C/W), and pinout. STP2NK90Z is not a drop-in replacement; it serves lower-current applications (<2.1 A) in compact DPAK layouts. Substitution would require PCB redesign, gate drive recalculation, and thermal validation.
STP2NK90Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- SuperMESH™
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 900 V
- Current - Continuous Drain (Id) @ 25°C:
- 2.1A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 6.5Ohm @ 1.05A, 10V
- Vgs(th) (Max) @ Id:
- 4.5V @ 50µA
- Gate Charge (Qg) (Max) @ Vgs:
- 27 nC @ 10 V
- Vgs (Max):
- ±30V
- Input Capacitance (Ciss) (Max) @ Vds:
- 485 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 70W (Tc)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STP2NK90Z FAQ
1.How can I place an order for STP2NK90Z through Aetrix?
Please submit a Request for Quotation (RFQ) for STP2NK90Z 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 STP2NK90Z reliable?
The price and inventory of STP2NK90Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP2NK90Z is usually 5 days.
3.What payment methods are accepted for STP2NK90Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP2NK90Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STP2NK90Z?
STP2NK90Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STP2NK90Z 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 STP2NK90Z?
For technical support, including STP2NK90Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP2NK90Z requirements.
6.How does Aetrix verify that STP2NK90Z is sourced from the original manufacturer or authorized distributors?
All STP2NK90Z 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 STP2NK90Z meets industry standards.
7.What is the process for return or replacement of STP2NK90Z?
All STP2NK90Z units undergo pre-shipment inspection (PSI). If there is an issue with STP2NK90Z, 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 STP2NK90Z part is unused and in its original packaging.
Return procedure for STP2NK90Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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