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

STMicroelectronics STD2N95K5

Name: STD2N95K5
Brand: STMicroelectronics
SKU: STD2N95K5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STD2N95K5

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STD2N95K5.pdf

Description:: MOSFET N-CH 950V 2A DPAK

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Product details

Overview

STD2N95K5 from STMicroelectronics is a 950 V, 2 A N-channel Power MOSFET in IPAK (TO-251) package, fabricated with MDmesh K5 vertical structure technology. It delivers 4.2 Ω typical R_DS(on), 10 nC total gate charge, and 50 mJ single-pulse avalanche energy - enabling high-voltage flyback and resonant converters requiring ruggedness, low switching loss, and compact power density.

For engineers reviewing the STD2N95K5 datasheet, STD2N95K5 pinout, STD2N95K5 application, or STD2N95K5 equivalent, key selection criteria include its 950 V V_(BR)DSS, ultra-low Q_g/R_DS(on) figure of merit, 100% avalanche-tested reliability, Zener-protected gate, and IPAK thermal performance (R_thJC = 2.78 °C/W).

Technical Context

This device implements ST's MDmesh K5 proprietary vertical superjunction architecture to minimize conduction and switching losses simultaneously. Its 950 V breakdown voltage supports primary-side switching in offline SMPS up to 400 V AC mains, while the 10 nC Q_g and 0.5 pF C_rss enable high-frequency operation with reduced EMI and driver stress.

The integrated source-drain diode features 300 ns t_rr at 25 °C and 525 ns at 150 °C, with 1.15 µC Q_rr, supporting quasi-resonant and LLC topologies where diode recovery behavior directly impacts efficiency and snubber design.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)DSS	950 V - Supports 380–400 V DC bus in universal-input offline converters without derating.
R_DS(on) max	5 Ω @ V_GS = 10 V, I_D = 1 A - Enables <2 W conduction loss at 2 A continuous drain current.
Q_g	10 nC - Reduces gate drive power and enables use of low-power drivers in high-frequency designs.
E_AS	50 mJ - Confirmed unclamped inductive switching robustness for hard-switched PFC and flyback stages.
t_r/t_f	13.5 ns / 32.5 ns - Fast edge rates support >300 kHz operation with controlled dv/dt (50 V/ns ruggedness).
R_thJC	2.78 °C/W - Allows 45 W dissipation at T_C = 25 °C; critical for thermally constrained IPAK layouts.
V_SD	1.5 V @ I_SD = 2 A - Low forward drop reduces body-diode conduction loss during dead-time intervals.

Pinout & Package

IPAK (TO-251) package with exposed drain tab for enhanced thermal conduction and mechanical mounting. Tab is electrically connected to drain (D). Standard lead-free, RoHS-compliant ECOPACK2 grade.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal; Zener-protected (±30 V rating); requires ≤10 V drive for full enhancement.
2 (D) / TAB	Drain	Main high-voltage power terminal; tab provides low-inductance, high-current path and thermal interface.
3 (S)	Source	Reference node for gate drive and current sensing; tied to power ground in low-side configurations.

Key Features

Feature	Design Value
MDmesh K5 vertical structure	Reduces R_DS(on) × area by >30% vs prior-generation 950 V MOSFETs, enabling smaller heatsinks.
Ultra-low Q_g/R_DS(on) FoM	2.38 nC/Ω - Industry-leading trade-off between switching speed and conduction loss for HV SMPS.
100% UIS tested	Every unit validated for 50 mJ single-pulse avalanche energy - eliminates field failure risk in inductive transients.
Zener-protected gate	Integrated ±30 V gate-source clamp prevents ESD or overdrive damage during assembly or operation.

Applications

Industrial Flyback Converters

AC-DC Adapters (≥65 W)

Use Scenario: Primary-side switch in 65–100 W universal-input flyback converters for industrial HMIs and PLC power supplies.

IC Role / Device Role / Timing Role: High-voltage switching element operating at 65–130 kHz; handles 400 V DC bus with margin.

Use Value: 950 V rating avoids derating; 50 mJ E_AS withstands transformer leakage spikes without snubber oversizing.

Use Scenario: Compact wall-plug adapters for medical monitors and test equipment requiring Class II isolation.

IC Role / Device Role / Timing Role: Primary-side MOSFET in QR flyback topology; leverages fast t_r/t_f for valley switching.

Use Value: 10 nC Q_g lowers driver loss; 300 ns t_rr minimizes diode reverse recovery loss at light load.

LED Driver Power Stages

High-Voltage PFC Circuits

Use Scenario: Constant-current buck-boost LED driver for street lighting (230 V AC input, 72 V string).

IC Role / Device Role / Timing Role: Main switching transistor in high-side buck-boost configuration; operates at 100–200 kHz.

Use Value: 4.2 Ω R_DS(on) limits conduction loss to <1.7 W at 2 A; IPAK tab simplifies thermal pad layout on PCB.

Use Scenario: Switching element in boost PFC stage for 1 kW telecom rectifiers with 400 V DC output.

IC Role / Device Role / Timing Role: Hard-switched boost switch handling 2 A average current and 8 A pulsed drain current.

Use Value: 50 V/ns dv/dt ruggedness ensures stable operation under line transients; 1.3 A I_D @ T_C = 100 °C supports thermal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP2N95K5	Same die, TO-220 package; R_thJC = 2.5 °C/W; higher thermal mass but larger footprint.	Better suited for forced-air-cooled industrial PSUs where board space is less constrained.	Select when thermal budget allows larger package and mechanical mounting favors TO-220.
FDPF7N95NZ	950 V, 7 A, 1.4 Ω R_DS(on); D²PAK package; no integrated Zener; lower FoM (Q_g/R_DS(on) = 4.3).	Higher current rating suits higher-power PFC, but slower switching increases EMI filtering burden.	Choose only if system requires >2 A continuous current and can accommodate larger gate drive and thermal design.

Compared with STP2N95K5 and FDPF7N95NZ, STD2N95K5 offers optimal balance of compact IPAK form factor, industry-leading FoM, and guaranteed avalanche ruggedness - making it preferred for space-constrained, high-efficiency 65–100 W SMPS where reliability under transient stress is non-negotiable.

Availability

STD2N95K5 is available at Aetrix Electronics and suitable for industrial flyback converters, AC-DC adapters, and high-voltage LED drivers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STD2N95K5 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 automotive, industrial, and consumer markets.

STD2N95K5 belongs to ST's MDmesh K5 high-voltage Power MOSFET product line, engineered specifically for high-efficiency, high-density offline SMPS and resonant converters demanding superior R_DS(on)-to-area ratio and ruggedness.

FAQ

What is the maximum continuous drain current for STD2N95K5 at 100 °C case temperature?

The maximum continuous drain current is 1.3 A at T_C = 100 °C, as specified in Table 1 of DS9952 Rev 2. This derating reflects thermal limits of the IPAK package (R_thJC = 2.78 °C/W) and ensures safe operation within SOA boundaries under sustained load conditions.

Does STD2N95K5 include integrated gate protection?

Yes - STD2N95K5 integrates a bidirectional Zener diode between gate and source, rated for ±30 V, providing inherent protection against electrostatic discharge and gate overvoltage events during PCB handling or circuit transients.

Can STD2N95K5 be used in zero-voltage switching (ZVS) topologies?

Yes - its 0.5 pF Crss, 10 nC Q_g, and 50 V/ns dv/dt ruggedness make it suitable for LLC and phase-shifted full-bridge topologies where soft switching reduces switching loss and EMI; verified by ST's application note AN4597 for ZVS design.

What is the safe operating area (SOA) limitation at 100 µs pulse width?

At 100 µs pulse width and T_C = 25 °C, the SOA is limited by R_DS(on) to approximately 10 A at 100 V V_DS, per Figure 1 in DS9952. This defines the upper boundary for short-duration surge currents in PFC or inrush limiting applications.

STD2N95K5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH5™

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 950 V

Current - Continuous Drain (Id) @ 25°C:: 2A (Tc)

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

Rds On (Max) @ Id, Vgs:: 5Ohm @ 1A, 10V

Vgs(th) (Max) @ Id:: 5V @ 100µA

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

Vgs (Max):: 30V

Input Capacitance (Ciss) (Max) @ Vds:: 105 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 45W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

STD2N95K5 FAQ

1.How can I place an order for STD2N95K5 through Aetrix?

Please submit a Request for Quotation (RFQ) for STD2N95K5 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 STD2N95K5 reliable?

The price and inventory of STD2N95K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STD2N95K5 is usually 5 days.

3.What payment methods are accepted for STD2N95K5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STD2N95K5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STD2N95K5?

STD2N95K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STD2N95K5 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 STD2N95K5?

For technical support, including STD2N95K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STD2N95K5 requirements.

6.How does Aetrix verify that STD2N95K5 is sourced from the original manufacturer or authorized distributors?

All STD2N95K5 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 STD2N95K5 meets industry standards.

7.What is the process for return or replacement of STD2N95K5?

All STD2N95K5 units undergo pre-shipment inspection (PSI). If there is an issue with STD2N95K5, 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 STD2N95K5 part is unused and in its original packaging.

Return procedure for STD2N95K5:

1.Submit a request within 90 days.

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

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