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

STMicroelectronics STF2N95K5

Name: STF2N95K5
Brand: STMicroelectronics
SKU: STF2N95K5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STF2N95K5

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: STF2N95K5.pdf

Description:: MOSFET N-CH 950V 2A TO220FP

Quantity:: RFQ Add To RFQ list

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Inventory:1,100

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Product details

Overview

STF2N95K5 from STMicroelectronics is a 950 V, 5 Ω max, 2 A N-channel Power MOSFET in IPAK (TO-251) package, built on MDmesh K5 vertical structure for ultra-low R_DS(on) × area and gate charge. It delivers 50 mJ single-pulse avalanche energy, 100% avalanche tested, and supports high-efficiency switching in offline SMPS and industrial AC-DC converters.

For engineers reviewing the STF2N95K5 datasheet, STF2N95K5 pinout, STF2N95K5 application, or STF2N95K5 equivalent, key selection criteria include its 950 V V_(BR)DSS, 10 nC total gate charge, 4.2 Ω typical R_DS(on), 45 W P_TOT, and rugged 50 V/ns dv/dt capability under MOSFET switching conditions.

Technical Context

This device employs ST's MDmesh K5 proprietary vertical silicon architecture to minimize conduction and switching losses simultaneously. Its 105 pF C_iss, 0.5 pF C_rss, and 16 Ω intrinsic gate resistance enable fast, low-loss hard-switching up to several hundred kHz.

The integrated Zener-protected gate ensures robustness against overvoltage transients, while the 1.5 V source-drain forward voltage at 2 A and 300 ns reverse recovery time support efficient synchronous rectification and flyback snubberless operation in high-voltage topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)DSS	950 V - Withstands full mains-derived DC bus voltages in 380–400 VAC input systems 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-current drivers in compact flyback controllers.
E_AS	50 mJ - Supports unclamped inductive switching in relay drivers and solenoid controls without external clamping.
dv/dt ruggedness	50 V/ns - Ensures reliable turn-off immunity in noisy high-dV/dt environments like motor drives and PFC stages.
R_thJC	2.78 °C/W - Allows direct heatsink mounting with ≤125 °C junction rise at 45 W dissipation (T_C = 25 °C).

Pinout & Package

IPAK (TO-251) type C package: 3-pin surface-mount outline with exposed drain tab (pin 2) for thermal and electrical connection. Molded plastic body, lead-free and RoHS-compliant per ECOPACK® specifications.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal; requires ≤±30 V drive; 16 Ω intrinsic gate resistance limits ringing in high-speed switching.
2 (TAB/D)	Drain (exposed tab)	Main high-voltage power path; electrically and thermally connected to PCB copper pour for heat dissipation and EMI reduction.
3 (S)	Source	Reference node for gate drive and current sensing; connects to ground or low-side switch node in buck/flyback topologies.

Key Features

Feature	Design Value
Industry's lowest R_DS(on) × area	Enables compact high-voltage designs: 5 Ω achieved in IPAK footprint without trade-off in voltage rating or thermal performance.
Ultra-low gate charge (10 nC)	Reduces switching losses by >30% vs legacy 950 V MOSFETs; allows higher frequency operation without driver overheating.
100% avalanche tested	Guarantees single-pulse ruggedness to 50 mJ at T_J = 25 °C - eliminates need for external snubbers in cost-sensitive industrial supplies.
Zener-protected gate	Integrated gate-source clamp prevents damage from ±30 V transients - improves field reliability in unregulated AC line environments.

Applications

Industrial AC-DC Adapters

Offline Flyback Converters

Use Scenario: 24 V/2 A output adapter for PLC I/O modules operating from 85–265 VAC input.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch in discontinuous conduction mode (DCM) flyback topology.

Use Value: 950 V rating avoids series stacking; 50 mJ E_AS eliminates snubber, reducing BOM count by 3 components.

Use Scenario: 12 V/1.5 A isolated supply for smart meter communication interfaces.

IC Role / Device Role / Timing Role: Main power switch controlling energy transfer during primary on-time in quasi-resonant flyback.

Use Value: 10 nC Q_g enables clean 132 kHz switching with minimal gate drive loss and reduced EMI filter size.

High-Voltage Relay Drivers

Capacitor Discharge Ignition (CDI)

Use Scenario: Solid-state replacement for electromechanical relays in HVAC control panels handling 400 VAC loads.

IC Role / Device Role / Timing Role: Low-duty-cycle, high-voltage switch driving inductive relay coils with fast turn-off.

Use Value: 50 V/ns dv/dt ruggedness prevents false turn-on during coil de-energization; 8 A pulsed ID supports surge currents.

Use Scenario: Energy storage discharge switch in motorcycle CDI systems requiring precise spark timing.

IC Role / Device Role / Timing Role: High-speed, high-voltage switch releasing stored capacitor energy into ignition coil primary.

Use Value: 300 ns t_rr and 1.15 µC Q_rr ensure rapid diode commutation and minimal energy loss during discharge phase.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STU2N95K5	Same die, IPAK package, 4.2 Ω typ. R_DS(on), 10 nC Q_g	Identical electrical specs; differs only in marking and packaging (tube vs tape/reel)	Select when tube delivery or legacy ordering required; identical thermal and electrical behavior.
STD2N95K5	Same die, DPAK package, R_thJA = 120 °C/W (vs 100 °C/W for IPAK), same 950 V/5 Ω	Lower power density due to higher thermal resistance; unsuitable above ~25 W continuous dissipation	Choose only for space-constrained PCB layouts where DPAK footprint is mandatory and power <15 W.

Compared with STU2N95K5 and STD2N95K5, STF2N95K5 offers identical silicon performance but optimized for manual or semi-automated assembly via IPAK's robust tab mounting and lower R_thJC, making it preferred for industrial power supplies requiring long-term thermal stability.

Availability

STF2N95K5 is available at Aetrix Electronics and suitable for industrial AC-DC adapters, offline flyback converters, and high-voltage relay drivers requiring stable component supply across extended product lifecycles.

Supply support for STF2N95K5 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.

STF2N95K5 belongs to the MDmesh K5 high-voltage Power MOSFET product line, engineered specifically for high-efficiency, high-power-density offline SMPS and industrial switching applications demanding 800–1000 V breakdown capability.

FAQ

Is STF2N95K5 pin-compatible with STU2N95K5?

Yes - both share identical IPAK (TO-251) pinout: Gate (pin 1), Drain (tab/pin 2), Source (pin 3). Mechanical dimensions, thermal pad layout, and solder footprint are fully interchangeable. Only packaging format (tube vs bulk) and part marking differ.

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

The datasheet specifies I_D = 1.3 A at T_C = 100 °C. This reflects thermal derating due to R_thJC = 2.78 °C/W and P_TOT limit of 45 W. At this condition, R_DS(on) rises to ~5.5 Ω, yielding ~9.3 W conduction loss.

Does STF2N95K5 include an integrated body diode? What are its recovery characteristics?

Yes - it features a monolithic source-drain diode with 2 A continuous forward current rating. At T_J = 25 °C, t_rr = 300 ns and Q_rr = 1.15 µC under I_SD = 2 A, di/dt = 100 A/µs, V_DD = 60 V. Recovery is soft and controlled, minimizing voltage overshoot.

Can STF2N95K5 be used in zero-voltage switching (ZVS) resonant topologies?

Yes - its low C_oss (9 pF) and C_rss (0.5 pF), combined with 10 nC Q_g, support efficient ZVS operation in LLC and half-bridge resonant converters. The 50 V/ns dv/dt ruggedness ensures reliable turn-on even with high resonant voltage slew rates.

STF2N95K5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH5™

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

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):: 20W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220FP

STF2N95K5 FAQ

1.How can I place an order for STF2N95K5 through Aetrix?

Please submit a Request for Quotation (RFQ) for STF2N95K5 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 STF2N95K5 reliable?

The price and inventory of STF2N95K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STF2N95K5 is usually 5 days.

3.What payment methods are accepted for STF2N95K5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STF2N95K5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STF2N95K5?

STF2N95K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STF2N95K5 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 STF2N95K5?

For technical support, including STF2N95K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STF2N95K5 requirements.

6.How does Aetrix verify that STF2N95K5 is sourced from the original manufacturer or authorized distributors?

All STF2N95K5 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 STF2N95K5 meets industry standards.

7.What is the process for return or replacement of STF2N95K5?

All STF2N95K5 units undergo pre-shipment inspection (PSI). If there is an issue with STF2N95K5, 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 STF2N95K5 part is unused and in its original packaging.

Return procedure for STF2N95K5:

1.Submit a request within 90 days.

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

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