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

STMicroelectronics STL305N4LF8AG

Name: STL305N4LF8AG
Brand: STMicroelectronics
SKU: STL305N4LF8AG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STL305N4LF8AG

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: 8-PowerVDFN

Datasheet:: STL305N4LF8AG.pdf

Description:: POWERFLAT 5X6 WF

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STL305N4LF8AG 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, 1.0 mΩ max. R_DS(on) at V_GS = 10 V, and 304 A continuous drain current at T_C = 25 °C. It delivers ultra-low conduction loss and fast switching for high-efficiency automotive motor control stages.

For engineers reviewing the STL305N4LF8AG datasheet, STL305N4LF8AG pinout, STL305N4LF8AG application, or STL305N4LF8AG equivalent, key selection criteria include its 175 °C maximum junction temperature, 100% avalanche tested ruggedness, low Q_g (70 nC @ 10 V), MSL1 moisture sensitivity, and wettable flank package for automated optical solder-joint inspection in safety-critical automotive assemblies.

Technical Context

This MOSFET employs ST's STripFET F8 trench-gate technology to simultaneously minimize R_DS(on) and internal capacitances (C_iss = 5400 pF, C_oss = 1700 pF), enabling high-frequency switching with reduced gate drive power and lower EMI generation.

Its logic-level gate threshold (V_GS(th) = 1.2–2.0 V) ensures full enhancement with standard 3.3 V or 5 V microcontroller outputs, while the integrated source-drain diode (V_SD = 1.1 V @ 60 A) supports freewheeling in H-bridge and half-bridge topologies without external diodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage for 12 V/24 V automotive battery rail applications with transient margin
R_DS(on) max.	1.0 mΩ @ V_GS = 10 V - Enables <1 W conduction loss at 30 A, critical for thermal management in compact ECUs
I_D continuous	304 A @ T_C = 25 °C - High-current capability for electric power steering (EPS) and HVAC blower drivers
Q_g	70 nC @ V_GS = 0–10 V - Reduces gate driver power demand and enables faster turn-on/turn-off (t_d(on) = 14 ns)
T_J max.	175 °C - Supports operation in under-hood environments with minimal derating up to 150 °C ambient
E_AS	420 mJ @ I_D = 60 A - Confirmed single-pulse avalanche energy rating for inductive load switching robustness
R_thJC	0.9 °C/W - Enables high-power dissipation with minimal junction-to-case thermal drop when mounted on copper heatsink pads

Pinout & Package

STL305N4LF8AG uses the PowerFLAT 5x6 WF type C package - a 8-pin wettable flank surface-mount device with exposed drain pad for thermal and electrical performance. The package features gull-wing leads compatible with standard reflow profiles and optical solder-joint inspection.

Pin/Terminal	Circuit Role	Design Meaning
D (Pins 5, 6, 7, 8)	Drain terminal	Internally connected to large copper-exposed bottom pad; primary current path and thermal conduction path to PCB
G (Pin 4)	Gate terminal	Control input requiring low Q_g drive; isolated from drain by enhanced trench gate dielectric
S (Pins 1, 2, 3)	Source terminal	Return path for load current; multiple pins reduce parasitic inductance and improve current sharing in high-di/dt switching

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use per stress test requirements including HTOL, TC, UHAST, and ESD - required for body, chassis, and powertrain modules
Wettable flank leads	Vertical sidewall plating enables automated AOI of solder fillets - eliminates X-ray inspection cost in Tier-1 production lines
100% avalanche tested	Each unit undergoes single-pulse avalanche stress at rated I_AS = 60 A - guarantees robustness against inductive kickback in motor drives
Low R_DS(on) × Q_g FoM	1.0 mΩ × 70 nC = 70 mΩ·nC - industry-leading figure of merit for high-current, high-frequency switching efficiency
MSL1 rating	Unlimited floor life at ≤30 °C / 60% RH - allows direct placement without baking, reducing manufacturing overhead

Applications

Electric Power Steering (EPS)

Automotive HVAC Blower

Use Scenario: High-current H-bridge driving 3-phase brushless DC motor in column-assist EPS systems with tight space constraints.

IC Role / Device Role / Timing Role: Low-side and high-side switching element delivering 200+ A peak phase current with <100 ns switching transitions.

Use Value: 1.0 mΩ R_DS(on) reduces conduction loss by >40% vs. legacy 2.2 mΩ devices, enabling smaller heatsinks and higher torque density.

Use Scenario: PWM-controlled DC motor driver in cabin air circulation system, operating continuously at 12 V nominal with 100 ms surge currents.

IC Role / Device Role / Timing Role: Single high-current half-bridge switch handling bidirectional airflow control with regenerative braking via body diode.

Use Value: 175 °C T_J max. and 121 A continuous source-drain diode current allow uninterrupted operation during extended cabin heating cycles.

Brake-by-Wire Actuator

Engine Start-Stop Solenoid Driver

Use Scenario: Safety-critical linear actuator control in electro-hydraulic brake (EHB) systems requiring ASIL-B functional safety compliance.

IC Role / Device Role / Timing Role: Precision current-regulated switch controlling solenoid coil with real-time current sensing feedback loop.

Use Value: MSL1 and AEC-Q101 qualification ensure zero moisture-induced failure risk; 420 mJ E_AS withstands repeated inductive turn-off transients without degradation.

Use Scenario: High-reliability 40 V solenoid driver for engine stop-start valve activation, cycling >100,000 times over vehicle lifetime.

IC Role / Device Role / Timing Role: Robust low-side switch interfacing directly with 3.3 V MCU GPIO, eliminating level-shifter components.

Use Value: Logic-level V_GS(th) (1.2–2.0 V) ensures guaranteed turn-on with 3.3 V drive; wettable flanks enable 100% solder joint traceability for zero-defect manufacturing.

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	R_DS(on) = 2.6 mΩ @ 10 V; Q_g = 51 nC; same 40 V rating but higher on-resistance	Lower current capability (180 A) limits use in >200 A EPS designs	Select when lower gate charge priority outweighs conduction loss; verify thermal margin at 150 °C ambient
ON Semiconductor NTMFS5C428NT1G	R_DS(on) = 0.95 mΩ @ 10 V; Q_g = 72 nC; AEC-Q101 qualified but no wettable flank package	Lacks AOI-compatible leads - requires X-ray inspection for solder joint validation in safety-critical lines	Prefer for non-automotive industrial motor drives where optical inspection is not mandated

Compared with IPP026N04L and NTMFS5C428NT1G, STL305N4LF8AG uniquely combines sub-1.0 mΩ R_DS(on), wettable flank leads, and 100% avalanche testing - making it the only option qualified for ASIL-B–level powertrain actuators requiring both electrical ruggedness and process traceability.

Availability

STL305N4LF8AG is available at Aetrix Electronics and suitable for automotive motor control, chassis and safety systems, and ICE powertrain applications requiring stable component supply across multi-year vehicle production lifecycles.

Supply support for STL305N4LF8AG 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

This device belongs to ST's STripFET F8 automotive power MOSFET product line, engineered specifically for high-current, high-reliability switching in safety-critical vehicle subsystems operating up to 175 °C junction temperature.

FAQ

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

The STL305N4LF8AG supports 215 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS14225 Rev 2. This value reflects thermal derating due to increased R_DS(on) and reduced safe operating area at elevated temperatures, and must be validated with actual PCB layout and heatsinking.

Does this MOSFET require a gate resistor for automotive PWM switching?

Yes - a gate resistor (typically 4.7 Ω) is recommended to control dV/dt and prevent oscillation during high-di/dt switching. The datasheet specifies switching times (e.g., t_d(off) = 55 ns) using R_G = 4.7 Ω, and omitting it risks shoot-through in bridge configurations and EMI compliance failure.

Can STL305N4LF8AG replace older STPower MOSFETs like STL220N4LF8AG?

Yes - STL305N4LF8AG is a direct upgrade to STL220N4LF8AG, offering 304 A vs. 220 A current rating, identical PowerFLAT 5x6 footprint, and improved R_DS(on) (1.0 mΩ vs. 1.3 mΩ). No layout change is needed, but gate drive strength should be verified for the higher Q_g.

Is the source-drain diode suitable for synchronous rectification?

No - while the integrated diode supports freewheeling (V_SD = 1.1 V @ 60 A), its reverse recovery time (t_rr = 60 ns) and charge (Q_rr = 70 nC) are not optimized for synchronous rectification. External Schottky or GaN FETs are preferred for >100 kHz ZVS/ZCS topologies.

STL305N4LF8AG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ F8

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:: 120A (Tc)

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

Rds On (Max) @ Id, Vgs:: 1mOhm @ 60A, 10V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 70 nC @ 10 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 5400 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 167W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: PowerFlat™ (5x6)

STL305N4LF8AG FAQ

1.How can I place an order for STL305N4LF8AG through Aetrix?

Please submit a Request for Quotation (RFQ) for STL305N4LF8AG 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 STL305N4LF8AG reliable?

The price and inventory of STL305N4LF8AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STL305N4LF8AG is usually 5 days.

3.What payment methods are accepted for STL305N4LF8AG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STL305N4LF8AG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STL305N4LF8AG?

STL305N4LF8AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STL305N4LF8AG 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 STL305N4LF8AG?

For technical support, including STL305N4LF8AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STL305N4LF8AG requirements.

6.How does Aetrix verify that STL305N4LF8AG is sourced from the original manufacturer or authorized distributors?

All STL305N4LF8AG 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 STL305N4LF8AG meets industry standards.

7.What is the process for return or replacement of STL305N4LF8AG?

All STL305N4LF8AG units undergo pre-shipment inspection (PSI). If there is an issue with STL305N4LF8AG, 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 STL305N4LF8AG part is unused and in its original packaging.

Return procedure for STL305N4LF8AG:

1.Submit a request within 90 days.

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

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