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

STMicroelectronics STL325N4LF8AG

Name: STL325N4LF8AG
Brand: STMicroelectronics
SKU: STL325N4LF8AG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STL325N4LF8AG

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: 8-PowerVDFN

Datasheet:: STL325N4LF8AG.pdf

Description:: AUTOMOTIVE-GRADE N-CHANNEL 40 V

Quantity:: RFQ Add To RFQ list

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Inventory:2,910

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Product details

Overview

STL325N4LF8AG from STMicroelectronics is an AEC-Q101 qualified N-channel logic-level Power MOSFET in PowerFLAT 5x6 wettable flank package, rated for 40 V V_DS, 0.75 mΩ max. R_DS(on) at V_GS = 10 V, and 373 A continuous drain current at T_C = 25 °C. It delivers ultra-low conduction loss and fast switching in high-current automotive power stages such as 48 V DC-DC converters and battery disconnect switches.

For engineers reviewing the STL325N4LF8AG datasheet, STL325N4LF8AG pinout, STL325N4LF8AG application, or STL325N4LF8AG equivalent, key selection criteria include its 175 °C junction rating, 100% avalanche tested robustness, MSL1 moisture sensitivity level, and wettable flank compatibility with automated optical solder-joint inspection in automotive PCB assembly.

Technical Context

This device employs ST's StripFET F8 trench-gate technology to minimize R_DS(on) while reducing C_iss (7657 pF), C_oss (1968 pF), and Q_g (95 nC at V_GS = 0–10 V), enabling high-efficiency synchronous rectification and low-loss PWM operation. Its gate threshold voltage (1.2–2.0 V) ensures reliable turn-on with standard 3.3 V or 5 V logic drivers.

The MOSFET supports rugged unclamped inductive switching via 590 mJ single-pulse avalanche energy (E_AS) and 60 A I_AS, with thermal resistance R_thJC = 0.8 °C/W enabling high-power density mounting on copper-clad PCBs without discrete heatsinks in many automotive applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum drain-source blocking voltage for 48 V nominal systems with transient margin
R_DS(on) max.	0.75 mΩ at V_GS = 10 V, I_D = 60 A - Enables <1.5 W conduction loss at 100 A, critical for thermal management
I_D continuous	373 A at T_C = 25 °C - Supports high-current battery-side switching in EV auxiliary power units
Q_g	95 nC at V_GS = 0–10 V - Determines gate driver power requirement and switching speed in hard-switched topologies
E_AS	590 mJ at T_j = 25 °C - Guarantees safe operation during load dump or inductive kick events without external snubbers
T_j max.	175 °C - Allows sustained operation in engine bay environments with minimal derating
R_thJC	0.8 °C/W - Enables direct thermal coupling to heatsink or copper plane for compact thermal design

Pinout & Package

STL325N4LF8AG uses the PowerFLAT 5x6 WF type C package - a 5 mm × 6 mm surface-mount, wettable flank, dual-side cooling package with exposed drain pad for low-inductance, high-current routing and automated solder-joint inspection.

Pin/Terminal	Circuit Role	Design Meaning
D (Pins 5, 6, 7, 8)	Drain (connected to exposed pad)	Primary current path and thermal interface; must be soldered to large copper pour for conduction and heat dissipation
G (Pin 4)	Gate	Control input requiring low-impedance drive due to 95 nC total gate charge; sensitive to layout-induced ringing
S (Pins 1, 2, 3)	Source	Return path for load current; ties to ground plane and provides reference for gate drive in high-side configurations

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive use including temperature cycling, HTRB, and ESD testing per stress test plan
Wettable flank package	Vertical sidewall plating enables AOI verification of solder fillet integrity on production lines
100% avalanche tested	Each unit subjected to controlled unclamped inductive switching to guarantee minimum E_AS performance
MSL1 rating	Unlimited floor life at ≤30 °C/60% RH - no baking required before reflow
175 °C operating junction	Enables full-rated current delivery in under-hood environments without thermal throttling

Applications

48 V Battery Disconnect Switch

Automotive DC-DC Converter Primary Side

Use Scenario: High-reliability isolation of 48 V battery from vehicle subsystems during fault conditions or sleep mode.

IC Role / Device Role / Timing Role: Main power switch controlling bidirectional current flow between battery and load; operates in static on/off state with occasional fast transition.

Use Value: 0.75 mΩ R_DS(on) limits voltage drop to <75 mV at 100 A, preserving system efficiency and minimizing heat generation in confined space.

Use Scenario: High-frequency synchronous rectification in 48 V–12 V buck converters powering ADAS ECUs and infotainment systems.

IC Role / Device Role / Timing Role: Low-side switching element in hard-switched or ZVS topology; driven at 200–500 kHz with precise timing control.

Use Value: 95 nC Q_g and 7657 pF C_iss support efficient gate driving with standard 2 A peak drivers, reducing driver BOM cost and layout complexity.

Electric Power Steering (EPS) Motor Driver

On-Board Charger (OBC) Input Stage

Use Scenario: Half-bridge leg in three-phase inverter supplying torque assist motor in EPS systems.

IC Role / Device Role / Timing Role: High-current switching device handling up to 373 A peak phase current; subject to repetitive avalanche stress during regeneration.

Use Value: 590 mJ E_AS and 1492 A pulsed current rating ensure robustness against motor back-EMF spikes without external clamping diodes.

Use Scenario: Active front-end (AFE) switch in bi-directional OBC AC/DC stage for grid-to-vehicle and vehicle-to-grid operation.

IC Role / Device Role / Timing Role: Fast-switching, high-conductivity switch in totem-pole PFC or dual-active-bridge topology.

Use Value: 175 °C T_j max and 0.8 °C/W R_thJC allow sustained 10 kW+ operation with minimal thermal margin, supporting compact OBC form factors.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Infineon IPP026N04L	40 V, 0.26 mΩ R_DS(on), TO-263 package, non-wettable flank	Larger footprint, no AOI-compatible leads; higher R_thJA (30 °C/W vs. 20 °C/W)	Preferred where board space allows TO-263 and optical inspection is not required
ON Semiconductor NTMFS4C06NT1G	40 V, 0.65 mΩ R_DS(on), PowerTrench® 5x6, MSL3, non-AEC-Q101	Not automotive-qualified; lower avalanche rating (E_AS = 320 mJ); requires baking before reflow	Suitable for industrial-grade 48 V systems where AEC-Q101 and MSL1 are not mandated

Compared with IPP026N04L and NTMFS4C06NT1G, STL325N4LF8AG uniquely combines AEC-Q101 qualification, wettable flank geometry, MSL1 handling, and 590 mJ avalanche energy-making it the only option qualified for safety-critical, high-density, optically inspected automotive power stages.

Availability

STL325N4LF8AG is available at Aetrix Electronics and suitable for 48 V battery management systems, automotive DC-DC converters, and electric power steering motor drives requiring stable component supply across multi-year vehicle production cycles.

Supply support for STL325N4LF8AG 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.

This device belongs to ST's Automotive Power MOSFET portfolio, engineered specifically for high-current, high-reliability 12 V/48 V hybrid and electric vehicle power systems demanding AEC-Q101 compliance and extended temperature operation.

FAQ

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

The STL325N4LF8AG supports 264 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS13900. This derating reflects thermal limitations of the PowerFLAT 5x6 package and PCB layout; actual achievable current depends on copper area, airflow, and adjacent component heating.

Does this MOSFET require a gate resistor for stability in hard-switched applications?

Yes - a gate resistor (typically 2.2–4.7 Ω) is recommended to dampen ringing caused by interaction between Q_g (95 nC), L_stray, and C_iss (7657 pF). Layout optimization (short gate traces, ground plane under driver) is equally critical to prevent oscillation during 10 ns turn-on delay and 6.5 ns rise time.

Can STL325N4LF8AG be used in high-side switch configurations?

Yes - its 40 V V_DS rating and logic-level V_GS(th) (1.2–2.0 V) support high-side operation with bootstrap or isolated gate drivers. However, source node switching requires careful attention to dV/dt immunity and floating supply design, especially given its 50 pF Crss and 1968 pF Coss values.

Is the wettable flank feature compatible with lead-free reflow profiles?

Yes - the PowerFLAT 5x6 WF type C package is qualified for standard JEDEC J-STD-020D lead-free reflow (peak 260 °C, 10 s max), and its MSL1 rating eliminates pre-bake requirements. The wettable flank plating ensures consistent solder meniscus formation under IPC-A-610 Class 3 inspection criteria.

STL325N4LF8AG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-PowerVDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 373A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 0.75mOhm @ 60A, 10V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 95 nC @ 10 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 7657 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 188W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: PowerFlat™ (5x6)

STL325N4LF8AG FAQ

1.How can I place an order for STL325N4LF8AG through Aetrix?

Please submit a Request for Quotation (RFQ) for STL325N4LF8AG 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 STL325N4LF8AG reliable?

The price and inventory of STL325N4LF8AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STL325N4LF8AG is usually 5 days.

3.What payment methods are accepted for STL325N4LF8AG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STL325N4LF8AG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STL325N4LF8AG?

STL325N4LF8AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STL325N4LF8AG 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 STL325N4LF8AG?

For technical support, including STL325N4LF8AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STL325N4LF8AG requirements.

6.How does Aetrix verify that STL325N4LF8AG is sourced from the original manufacturer or authorized distributors?

All STL325N4LF8AG 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 STL325N4LF8AG meets industry standards.

7.What is the process for return or replacement of STL325N4LF8AG?

All STL325N4LF8AG units undergo pre-shipment inspection (PSI). If there is an issue with STL325N4LF8AG, 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 STL325N4LF8AG part is unused and in its original packaging.

Return procedure for STL325N4LF8AG:

1.Submit a request within 90 days.

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

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