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

STMicroelectronics STP95N4F3

Name: STP95N4F3
Brand: STMicroelectronics
SKU: STP95N4F3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP95N4F3

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: STP95N4F3.pdf

Description:: MOSFET N-CH 40V 80A TO220AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STP95N4F3 from STMicroelectronics is an N-channel enhancement-mode Power MOSFET in TO-220 package, rated for 40 V V_DS, 5.4–6.2 mΩ R_DS(on) at V_GS = 10 V and I_D = 40 A, 80 A continuous drain current at T_C = 25 °C, and 110 W total power dissipation - designed for high-efficiency automotive switching applications including motor control and DC-DC conversion.

For engineers reviewing the STP95N4F3 datasheet, STP95N4F3 pinout, STP95N4F3 application, or STP95N4F3 equivalent, this device's low on-resistance, 100% avalanche-tested ruggedness, and STripFET™ III process make it critical for thermally constrained 12 V/24 V automotive power stages where conduction loss and safe operating area margin are design-critical.

Technical Context

This MOSFET employs STMicroelectronics' STripFET™ III technology to minimize both R_DS(on) and gate charge (Q_g = 54 nC typ.), enabling fast switching with reduced drive losses. Its standard threshold voltage (V_GS(th) = 2–4 V) ensures compatibility with 5 V and 3.3 V logic-level gate drivers.

The device features a robust source-drain diode with t_rr = 45–60 ns and Q_rr = 2.8 nC under harsh conditions (I_SD = 80 A, dI/dt = 100 A/µs, T_j = 150 °C), supporting synchronous rectification and inductive load commutation in automotive solenoid and pump drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage for 12 V/24 V automotive battery systems with transient margin.
R_DS(on) max	6.2 mΩ at V_GS = 10 V, I_D = 40 A - Enables ≤0.1 W conduction loss at 40 A, reducing heatsink requirements.
I_D cont.	80 A at T_C = 25 °C - Supports high-current loads such as starter relays and HVAC blowers without derating.
E_AS	400 mJ single-pulse avalanche energy - Guarantees ruggedness against inductive kickback in unclamped switching.
Q_g	54 nC typical - Low gate charge reduces driver power and enables <50 ns turn-on delay with 4.7 Ω gate resistor.
R_thj-case	1.36 °C/W - Enables direct mounting to chassis or heatsink for efficient thermal management in TO-220 form factor.
t_r/t_f	15/15 ns typical - Fast switching supports >100 kHz PWM operation in DC-DC converters and motor inverters.

Pinout & Package

STP95N4F3 is housed in a through-hole TO-220 type A package with isolated tab (drain-connected). The case is electrically connected to the drain terminal, requiring insulating hardware when mounted to grounded heatsinks.

Pin/Terminal	Circuit Role	Design Meaning
1 (Source)	Power return path for load current	Low-impedance connection to ground or low-side reference; carries full load current.
2 (Gate)	Control input for channel conduction	High-impedance MOS gate requiring <54 nC charge; sensitive to ESD and ringing.
3 (Drain / Tab)	Main power output and thermal interface	Connected to high-side supply rail; tab serves as primary heat transfer surface to heatsink.

Key Features

Feature	Design Value
STripFET™ III process	Reduces R_DS(on) × Q_g figure-of-merit by >30% vs. prior-generation MOSFETs, improving efficiency in hard-switched topologies.
100% avalanche tested	Every unit validated for 400 mJ single-pulse energy, eliminating need for external snubbers in relay and solenoid drive circuits.
Standard threshold drive	V_GS(th) = 2–4 V allows direct interfacing with microcontroller GPIO or low-voltage gate drivers without level-shifting.
Robust body diode	t_rr = 45–60 ns and Q_rr = 2.8 nC enable clean commutation in freewheeling paths of H-bridge motor controllers.

Applications

Automotive Starter Relay Driver

12 V DC-DC Synchronous Buck Converter

Use Scenario: High-current switching of starter solenoid coils in passenger vehicle ignition systems.

IC Role / Device Role / Timing Role: Main power switch handling 80 A inrush current during cranking; operates in on/off mode with <100 µs switching transitions.

Use Value: 6.2 mΩ R_DS(on) limits voltage drop to <500 mV at 80 A, preserving coil actuation energy and reducing thermal stress on PCB traces.

Use Scenario: High-efficiency step-down conversion from 12 V battery to 5 V/3.3 V for infotainment and ADAS modules.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier in 200–500 kHz buck converter; switches at full frequency with controlled dv/dt.

Use Value: 54 nC Q_g and 15 ns t_f minimize switching losses, enabling >95% efficiency at 20 A output while maintaining EMI compliance.

Electric Power Steering (EPS) Motor Phase Switch

Commercial Vehicle HVAC Blower Control

Use Scenario: Half-bridge phase leg in 3-phase EPS motor inverter for torque assist up to 10 kW.

IC Role / Device Role / Timing Role: High-side or low-side switch in 10–20 kHz PWM-driven inverter; subjected to repetitive avalanche during regenerative braking.

Use Value: 400 mJ E_AS rating and 175 °C T_jmax ensure reliable operation under fault conditions without desaturation protection circuitry.

Use Scenario: PWM-controlled blower motor driver in heavy-duty truck HVAC systems with 60–80 A peak demand.

IC Role / Device Role / Timing Role: Single-ended switch controlling brushed DC motor speed via duty-cycle modulation at 1–5 kHz.

Use Value: TO-220 package with 1.36 °C/W R_thj-case allows direct bolt-down to aluminum chassis, eliminating discrete heatsink and saving board space.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 40 V power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF1404PBF	R_DS(on) = 4.0 mΩ (lower), but Q_g = 131 nC (2.4× higher); no avalanche rating specified.	Higher conduction efficiency but slower switching and unverified avalanche ruggedness limits use in inductive automotive loads.	Prefer STP95N4F3 where reliability under repetitive inductive stress is required over marginal R_DS(on) gain.
IXTH80N40L2	R_DS(on) = 6.5 mΩ (slightly higher), Q_g = 65 nC, avalanche rated to 320 mJ (20% lower).	Compatible pinout but lower E_AS and higher gate charge reduce margin in high-di/dt solenoid switching.	STP95N4F3 offers superior safe operating area and lower drive loss for same footprint in safety-critical automotive functions.

Compared with IRF1404PBF and IXTH80N40L2, STP95N4F3 delivers optimal balance of low R_DS(on), moderate Q_g, and guaranteed 400 mJ avalanche capability - making it the preferred choice for automotive-grade switching where thermal margin, EMI control, and fault tolerance are jointly prioritized.

Availability

STP95N4F3 is available at Aetrix Electronics and suitable for automotive starter systems, 12 V DC-DC converters, and electric power steering motor drives requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for STP95N4F3 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, with manufacturing and R&D facilities across Europe, Asia, and the Americas.

This device belongs to ST's STripFET™ Power MOSFET product line, engineered specifically for automotive and industrial power switching applications demanding high current density, avalanche ruggedness, and AEC-Q101 qualification readiness.

FAQ

Is STP95N4F3 AEC-Q101 qualified?

No - STP95N4F3 is not officially AEC-Q101 qualified per its datasheet. However, it is explicitly designed for automotive applications, undergoes 100% avalanche testing, and shares STripFET™ III process and layout with AEC-Q101-qualified variants like STP95NF03L. Customers requiring formal qualification should verify latest status with ST or select certified alternatives.

What is the maximum recommended gate resistor value for driving STP95N4F3 at 200 kHz?

With Q_g = 54 nC and target t_on/t_off < 50 ns, a gate resistor ≤4.7 Ω is recommended when using a 1 A peak gate driver. At 200 kHz, this ensures <1% of switching period is spent in transition, minimizing overlap loss. Higher values increase switching loss and risk shoot-through in half-bridge configurations.

Can STP95N4F3 be used in parallel configurations?

Yes - its positive temperature coefficient for R_DS(on) (see Figure 11) enables inherent current sharing. For two devices in parallel, derate total current by 15% and ensure matched gate drive loop inductance and symmetric PCB layout to avoid dynamic imbalance. Thermal coupling via shared heatsink further improves stability.

Does the TO-220 tab require electrical isolation when mounted to a metal chassis?

Yes - the tab is internally connected to the drain terminal. If the chassis is grounded or at a different potential than the drain net, an isolating pad (e.g., mica or polymer film) and shoulder washer must be used. Failure to isolate risks short-circuit, ground loops, or compromised thermal performance due to dielectric layer resistance.

STP95N4F3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ III

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 80A (Tc)

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

Rds On (Max) @ Id, Vgs:: 6.2mOhm @ 40A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 54 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 2200 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 110W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STP95N4F3 FAQ

1.How can I place an order for STP95N4F3 through Aetrix?

Please submit a Request for Quotation (RFQ) for STP95N4F3 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 STP95N4F3 reliable?

The price and inventory of STP95N4F3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP95N4F3 is usually 5 days.

3.What payment methods are accepted for STP95N4F3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP95N4F3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP95N4F3?

STP95N4F3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP95N4F3 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 STP95N4F3?

For technical support, including STP95N4F3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP95N4F3 requirements.

6.How does Aetrix verify that STP95N4F3 is sourced from the original manufacturer or authorized distributors?

All STP95N4F3 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 STP95N4F3 meets industry standards.

7.What is the process for return or replacement of STP95N4F3?

All STP95N4F3 units undergo pre-shipment inspection (PSI). If there is an issue with STP95N4F3, 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 STP95N4F3 part is unused and in its original packaging.

Return procedure for STP95N4F3:

1.Submit a request within 90 days.

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

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