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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

STMicroelectronics STE30NK90Z

Name: STE30NK90Z
Brand: STMicroelectronics
SKU: STE30NK90Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STE30NK90Z

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: ISOTOP

Datasheet:: STE30NK90Z.pdf

Description:: MOSFET N-CH 900V 28A ISOTOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STE30NK90Z from STMicroelectronics is an N-channel 900 V, 0.21 Ω (typ), 28 A (T_C = 25°C) SuperMESH™ MOSFET in ISOTOP package, featuring integrated gate-source Zener protection, 100% avalanche tested operation, and 4.5 V/ns dv/dt capability-designed for high-voltage switching in industrial SMPS and PFC stages.

For engineers reviewing the STE30NK90Z datasheet, STE30NK90Z pinout, STE30NK90Z application, or STE30NK90Z equivalent, key selection criteria include its 900 V V_DSS, 0.21 Ω R_DS(on) at 10 V_GS, 500 W P_tot, 350 nC total gate charge, and Zener-protected gate architecture for robust ESD and transient immunity.

Technical Context

This device implements ST's SuperMESH™ process-a strip-based PowerMESH™ derivative optimized for ultra-low R_DS(on) while preserving high dv/dt immunity and rugged unclamped inductive switching performance. It integrates back-to-back gate-source Zener diodes rated at ±30 V breakdown for intrinsic overvoltage clamping without external components.

The MOSFET delivers 500 mJ single-pulse avalanche energy (E_AS) at T_j = 25°C with I_AR = 13 A, and supports 112 A pulsed drain current (I_DM) under SOA-limited conditions. Its C_oss,eq of 377 pF (0–720 V) enables predictable hard-switching behavior in high-frequency converters up to several hundred kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	900 V - supports mains-connected topologies up to 650 V DC bus with margin
R_DS(on)	0.21 Ω (typ) at V_GS = 10 V - enables low conduction loss in 20–30 A continuous power stages
I_D (T_C = 25°C)	28 A - defines maximum continuous current under ideal heatsinking
P_tot	500 W - sets thermal design baseline for TO-247-equivalent cooling requirements
Q_g	350 nC - determines gate driver strength needed for <250 ns turn-off in 450 V applications
dv/dt	4.5 V/ns - ensures noise-immune operation in fast-switching, high-dV/dt environments
E_AS	500 mJ - guarantees reliable energy absorption during unclamped inductive turn-off events

Pinout & Package

STE30NK90Z uses the ISOTOP package-a through-hole, isolated-tab power package with four terminals (Drain, Source, Gate, and isolated heatsink pad). The metal tab is electrically connected to the Drain, enabling direct mounting to a heatsink without insulating hardware while maintaining creepage/clearance compliance.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main high-side power terminal	Electrically tied to metal tab; requires isolation only if heatsink is grounded
Source	Power return and reference node	Low-impedance connection for gate drive return and current sensing
Gate	Control input	Zener-protected (±30 V) terminal; accepts standard 10 V logic-level drive
Isolation Pad	Heatsink interface	Non-electrical mechanical interface; provides 2500 V_RMS insulation to heatsink

Key Features

Feature	Design Value
Zener-protected gate	Integrated ±30 V gate-source clamping eliminates need for external TVS diodes
100% avalanche tested	Each unit validated for repetitive/unrepetitive avalanche stress per JEDEC JESD22-A109
SuperMESH™ structure	Optimized strip layout reduces R_DS(on) by ~25% vs prior-generation 900 V MOSFETs
High dv/dt immunity	4.5 V/ns rating prevents false turn-on in noisy high-speed switching nodes
ECOPACK® compliant	Lead-free second-level interconnect meets RoHS and JEDEC JESD97 marking standards

Applications

Industrial Switch-Mode Power Supplies

Active PFC Front-Ends

Use Scenario: 3 kW telecom rectifier operating from 3-phase 400 V AC input with boost PFC + LLC resonant DC/DC stage.

IC Role / Device Role / Timing Role: Main switch in boost PFC stage handling 28 A RMS input current at 100 kHz switching frequency.

Use Value: 0.21 Ω R_DS(on) minimizes conduction loss at full load; 900 V rating accommodates line surges up to 1.2 kV peak.

Use Scenario: Single-stage 1.5 kW server PSU with interleaved boost PFC using discrete MOSFETs.

IC Role / Device Role / Timing Role: High-side switching element in each boost leg, driven by dedicated gate drivers with 10 V logic levels.

Use Value: 350 nC Q_g enables efficient drive with IR2110-class drivers; Zener protection avoids gate oxide failure during startup transients.

UPS Inverter Stages

Motor Drive Half-Bridges

Use Scenario: Online double-conversion UPS with 6 kVA output, using six-pack IGBT+diode modules replaced by discrete MOSFETs for higher efficiency.

IC Role / Device Role / Timing Role: Low-side switch in three-phase inverter bridge, commutating 25 A motor current at 16 kHz PWM.

Use Value: 500 mJ E_AS withstands regenerative energy spikes during rapid deceleration without snubbers.

Use Scenario: 7.5 kW HVAC compressor drive with sensorless FOC control and 12 kHz carrier frequency.

IC Role / Device Role / Timing Role: Upper-leg switch in half-bridge configuration driving 300 V DC bus into inductive load.

Use Value: 4.5 V/ns dv/dt immunity prevents shoot-through in presence of high di/dt from motor windings.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STW30NK90Z	Same die, TO-247 package (non-isolated tab); R_DS(on) identical, but no built-in heatsink isolation	Requires insulating washer/mica pad when mounted to grounded heatsink	Select when board layout allows non-isolated mounting and lower cost is prioritized
IPP60R099C7	650 V CoolMOS™, 0.099 Ω, 35 A; lower voltage rating but superior Q_g/R_DS(on) ratio	Suitable only for ≤400 V DC bus systems; not rated for 900 V surge conditions	Prefer for 380–400 V PFC where efficiency > voltage margin is critical

Compared with STW30NK90Z, STE30NK90Z trades package cost for system-level isolation simplicity; versus IPP60R099C7, it sacrifices conduction efficiency to guarantee 900 V system-level surge resilience in industrial AC-input designs.

Availability

STE30NK90Z is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, active PFC front-ends, and UPS inverter stages requiring stable component supply and long-term lifecycle support.

Supply support for STE30NK90Z 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

This device belongs to ST's high-voltage SuperMESH™ MOSFET product line, engineered specifically for efficiency-critical, high-reliability 600–900 V switching applications in industrial power conversion equipment.

FAQ

Is STE30NK90Z still in active production?

No-STE30NK90Z is marked as Obsolete Product(s) in ST's official documentation (Rev 5, July 2006). However, Aetrix Electronics maintains legacy inventory with full traceability and offers extended lifecycle support including obsolescence mitigation planning and cross-reference guidance for drop-in or redesign alternatives.

What is the maximum safe operating temperature for the junction?

The maximum operating junction temperature (T_j) is 150°C, as specified in Table 1. Thermal design must ensure R_thj-case ≤ 0.23°C/W and adequate heatsinking to limit steady-state T_j below this threshold under worst-case ambient and power dissipation conditions.

Does the ISOTOP package require electrical isolation from the heatsink?

Yes-the ISOTOP metal tab is electrically connected to the Drain terminal. When mounted to a grounded heatsink, an insulating pad (e.g., mica or ceramic) rated for ≥2500 V_RMS must be used. The package itself provides 2500 V_RMS insulation between all four terminals and the heatsink interface.

Can STE30NK90Z replace older STP30NK90Z devices?

Yes-STE30NK90Z is a direct functional replacement for STP30NK90Z, sharing identical electrical specifications, pinout, and ISOTOP package. Key improvements include enhanced Zener protection (±30 V vs ±20 V) and tighter R_DS(on) distribution (0.21 Ω typ vs 0.26 Ω max), confirmed in Tables 4 and 7 of the datasheet.

STE30NK90Z Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH™

Package/Case:: ISOTOP

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 900 V

Current - Continuous Drain (Id) @ 25°C:: 28A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 260mOhm @ 14A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 150µA

Gate Charge (Qg) (Max) @ Vgs:: 490 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 12000 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 500W (Tc)

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

Supplier Device Package:: ISOTOP®

STE30NK90Z FAQ

1.How can I place an order for STE30NK90Z through Aetrix?

Please submit a Request for Quotation (RFQ) for STE30NK90Z 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 STE30NK90Z reliable?

The price and inventory of STE30NK90Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STE30NK90Z is usually 5 days.

3.What payment methods are accepted for STE30NK90Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STE30NK90Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STE30NK90Z?

STE30NK90Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STE30NK90Z 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 STE30NK90Z?

For technical support, including STE30NK90Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STE30NK90Z requirements.

6.How does Aetrix verify that STE30NK90Z is sourced from the original manufacturer or authorized distributors?

All STE30NK90Z 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 STE30NK90Z meets industry standards.

7.What is the process for return or replacement of STE30NK90Z?

All STE30NK90Z units undergo pre-shipment inspection (PSI). If there is an issue with STE30NK90Z, 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 STE30NK90Z part is unused and in its original packaging.

Return procedure for STE30NK90Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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