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

STMicroelectronics STI270N4F3

Name: STI270N4F3
Brand: STMicroelectronics
SKU: STI270N4F3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STI270N4F3

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-262-3 Long Leads, I2PAK, TO-262AA

Datasheet:: STI270N4F3.pdf

Description:: MOSFET N-CH 40V 160A I2PAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STI270N4F3 from STMicroelectronics is an automotive-grade N-channel 40 V Power MOSFET in D²PAK (TO-263) package, featuring 1.6 mΩ typ. R_DS(on), 160 A continuous drain current, and AEC-Q101 qualification. It employs STripFET™ F3 technology to minimize conduction and switching losses, and is 100% avalanche tested for robustness in high-reliability DC/DC converters, motor control, and battery disconnect circuits.

For engineers reviewing the STI270N4F3 datasheet, STI270N4F3 pinout, STI270N4F3 application, or STI270N4F3 equivalent, key selection criteria include its low R_DS(on) at 10 V gate drive, 330 W power dissipation capability, unclamped inductive switching performance, and thermal resistance of 0.45 °C/W junction-to-case - critical for thermally constrained automotive power stages.

Technical Context

This MOSFET uses STripFET™ F3 trench-gate process to achieve optimized charge balance between gate charge (Q_g = 110–150 nC) and output capacitance (C_oss = 1800 pF), enabling fast switching with low EMI generation. Its 2.0 V to 4.0 V gate threshold voltage ensures compatibility with standard 3.3 V and 5 V logic-level drivers while maintaining noise immunity.

The device integrates a robust body diode with 70 ns reverse recovery time (t_rr) and 225 nC reverse recovery charge (Q_rr) at 150 °C, supporting synchronous rectification and freewheeling in high-frequency buck converters and H-bridge motor drives without external Schottky supplementation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage suitable for 12 V and 24 V automotive battery systems with transient margin.
R_DS(on) max	2.0 mΩ - Ensures ≤ 5.12 W conduction loss at 160 A, enabling high-efficiency power delivery in space-constrained modules.
I_D (cont)	160 A at T_C = 25 °C - Supports high-current loads such as starter solenoid drivers and EPS motor phases.
P_TOT	330 W - Enables operation at full current with active heatsinking or PCB copper area ≥ 1 in² (2 oz Cu).
E_AS	1 J - Single-pulse avalanche energy rating validates ruggedness under inductive turn-off stress in unclamped switching.
Q_g	110–150 nC - Determines gate driver power requirement and switching speed trade-off in 100–500 kHz SMPS designs.
t_rr	70 ns - Limits diode commutation loss and voltage overshoot during hard-switched freewheeling in motor control.

Pinout & Package

The STI270N4F3 is housed in a surface-mount D²PAK (TO-263) package with exposed drain pad for thermal and electrical connection. The package features three terminals: Gate (G), Drain (D), and Source (S), with Drain electrically connected to the large metal tab on the backside.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate control input	Receives 10 V logic-level signal to fully enhance channel; requires <27 nC gate-source charge for turn-on.
D	Drain (high-side switch node)	Connected to main power rail; ties directly to PCB copper pour or heatsink for thermal management and current return path.
S	Source (low-side reference)	Serves as power ground reference for gate drive and current sensing; carries full load current to ground plane.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive underhood applications including temperature cycling, humidity, and mechanical shock per JEDEC standards.
100% avalanche tested	Each unit undergoes unclamped inductive switching test to guarantee single-pulse ruggedness up to 1 J.
Low Q_gd/Q_g ratio	Q_gd = 25 nC / Q_g ≈ 17–23% - Reduces Miller-induced shoot-through risk in half-bridge configurations.
Optimized C_iss/C_oss ratio	C_iss = 7400 pF, C_oss = 1800 pF - Balances gate drive efficiency and voltage-dependent capacitance for stable ZVS/ZCS design.

Applications

Automotive DC/DC Converters

Electric Power Steering (EPS) Motor Phases

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

IC Role / Device Role / Timing Role: Primary high-side synchronous rectifier MOSFET operating at 300–500 kHz with forced PWM control.

Use Value: 1.6 mΩ R_DS(on) minimizes conduction loss at 20–40 A load, improving system efficiency by >2.5% over 3 mΩ alternatives.

Use Scenario: Three-phase inverter stage driving brushless DC motor in column-assist EPS systems.

IC Role / Device Role / Timing Role: Low-side switching element in 60–100 kHz PWM-driven H-bridge with integrated current sensing.

Use Value: 70 ns t_rr and 225 nC Q_rr reduce diode commutation loss and voltage spike, lowering EMI filter size by 30%.

Battery Disconnect Switch (BMS)

Start-Stop System Solenoid Driver

Use Scenario: Solid-state main contactor replacement in 12 V lithium-ion battery management systems.

IC Role / Device Role / Timing Role: Single-pole, high-current isolation switch controlled via isolated gate driver with soft-start sequencing.

Use Value: 160 A continuous rating and 640 A pulsed capability support peak cranking currents without derating or paralleling.

Use Scenario: High-side driver for 12 V starter solenoid coil in micro-hybrid start-stop systems.

IC Role / Device Role / Timing Role: Fast-turn-on/turn-off switch delivering 100 ms pulses with <22 ns td(on) and <45 ns tf for precise engagement timing.

Use Value: 0.45 °C/W R_thj-case enables direct mounting to chassis heatsink, eliminating need for thermal interface material in compact solenoid modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRFB4115PBF	R_DS(on) = 3.2 mΩ @ 10 V; Q_g = 190 nC; TO-220 package	Higher conduction loss and slower switching; requires larger heatsink and gate driver current	Preferred only where through-hole assembly or legacy footprint compatibility is mandatory.
IXFH40N40P	V_DS = 400 V; R_DS(on) = 100 mΩ; TO-247 package	Designed for high-voltage industrial use, not automotive; unsuitable for 12 V battery systems due to excessive R_DS(on)	Not recommended for STI270N4F3 replacement; consider only if system voltage exceeds 100 V.

Compared with IRFB4115PBF and IXFH40N40P, the STI270N4F3 delivers superior power density and automotive reliability - its 1.6 mΩ R_DS(on), D²PAK thermal performance, and AEC-Q101 qualification make it uniquely suited for space- and safety-critical 12 V/24 V vehicle subsystems.

Availability

STI270N4F3 is available at Aetrix Electronics and suitable for automotive DC/DC converters, electric power steering motor drives, and battery disconnect switches requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STI270N4F3 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STripFET™ F3 product line targets high-efficiency, high-reliability power switching in automotive and industrial applications, emphasizing low R_DS(on), fast switching, and ruggedness under harsh electrical and thermal conditions.

FAQ

Is STI270N4F3 pin-compatible with STB270N4F3?

Yes - STI270N4F3 and STB270N4F3 share identical D²PAK package dimensions, pinout (G-D-S), and absolute maximum ratings. The STI270N4F3 is a documented variant released in Rev 5 of DocID13208, with no functional or electrical differences from STB270N4F3 in production use.

What gate drive voltage is required for full enhancement?

The STI270N4F3 achieves specified R_DS(on) at V_GS = 10 V, with gate threshold voltage ranging from 2.0 V to 4.0 V. For reliable operation across temperature and process variation, a minimum 10 V gate drive is recommended; 12 V is preferred to ensure margin against V_GS droop during high-current switching.

Can STI270N4F3 be used in parallel configurations?

Yes - its positive temperature coefficient of R_DS(on) (confirmed in Figure 11 of datasheet) enables stable current sharing when paralleled. Designers must match gate loop inductance and use individual gate resistors (≥ 4.7 Ω) to suppress oscillation; PCB layout symmetry is critical for thermal balance.

Does STI270N4F3 require external gate protection?

No external Zener is required - the device supports ±20 V gate-source voltage per absolute maximum rating. However, a 12–15 V gate clamp is recommended in noisy automotive environments to prevent accidental overvoltage during load dump transients or ESD events.

STI270N4F3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ III

Package/Case:: TO-262-3 Long Leads, I2PAK, TO-262AA

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 160A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2.6mOhm @ 80A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 150 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 7400 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 330W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: I2PAK

STI270N4F3 FAQ

1.How can I place an order for STI270N4F3 through Aetrix?

Please submit a Request for Quotation (RFQ) for STI270N4F3 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 STI270N4F3 reliable?

The price and inventory of STI270N4F3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STI270N4F3 is usually 5 days.

3.What payment methods are accepted for STI270N4F3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STI270N4F3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STI270N4F3?

STI270N4F3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STI270N4F3 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 STI270N4F3?

For technical support, including STI270N4F3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STI270N4F3 requirements.

6.How does Aetrix verify that STI270N4F3 is sourced from the original manufacturer or authorized distributors?

All STI270N4F3 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 STI270N4F3 meets industry standards.

7.What is the process for return or replacement of STI270N4F3?

All STI270N4F3 units undergo pre-shipment inspection (PSI). If there is an issue with STI270N4F3, 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 STI270N4F3 part is unused and in its original packaging.

Return procedure for STI270N4F3:

1.Submit a request within 90 days.

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

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