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

STMicroelectronics STL305N4F8AG

Name: STL305N4F8AG
Brand: STMicroelectronics
SKU: STL305N4F8AG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STL305N4F8AG

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: -

Datasheet:: STL305N4F8AG.pdf

Description:: N-CHANNEL ENHANCEMENT MODE 40V,

Quantity:: RFQ Add To RFQ list

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Inventory:170

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Product details

Overview

STL305N4F8AG from STMicroelectronics is an AEC-Q101-qualified N-channel logic-level Power MOSFET in PowerFLAT 5x6 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 features wettable flank leads, 175 °C max. junction temperature, and 100% avalanche testing - deployed in automotive powertrain and chassis safety systems requiring high-current switching with low conduction loss.

For engineers reviewing the STL305N4F8AG datasheet, STL305N4F8AG pinout, STL305N4F8AG application, or STL305N4F8AG equivalent, this page delivers verified electrical specs (including Q_g = 70 nC at 10 V, C_iss = 5400 pF), thermal data (R_thJC = 0.9 °C/W), and automotive-grade reliability metrics (MSL1, -55 to 175 °C T_J) critical for motor control BOM validation.

Technical Context

This MOSFET uses ST's STripFET F8 trench-gate technology to achieve ultra-low R_DS(on) while minimizing gate charge (Q_g = 70 nC) and output capacitance (C_oss = 1700 pF). Its enhanced structure reduces switching losses and improves safe operating area (SOA) robustness under pulsed conditions up to 1217 A.

The device integrates a co-packaged body diode with t_rr = 60 ns and Q_rr = 70 nC, enabling efficient synchronous rectification and freewheeling in H-bridge motor drivers. Gate threshold voltage (V_GS(th) = 1.2–2.0 V) ensures full enhancement with standard 3.3 V/5 V logic-level drive.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage compatible with 12 V/24 V automotive battery rails and transient clamping to ISO 7637-2 Level 5a.
R_DS(on) max.	1.0 mΩ at V_GS = 10 V - Enables <1 W conduction loss at 30 A, reducing heatsink requirements in high-current motor phases.
I_D continuous	304 A at T_C = 25 °C - Supports peak-phase currents in electric power steering (EPS) and brake-by-wire actuators.
Q_g	70 nC at V_GS = 0–10 V - Low gate drive energy enables fast turn-on (<14 ns t_d(on)) with standard gate drivers like STGAP2S.
R_thJC	0.9 °C/W - Allows direct thermal coupling to copper PCB pads or heatsinks, supporting >150 W steady-state dissipation in compact layouts.
E_AS	420 mJ at T_J = 25 °C - Withstands single-pulse inductive energy from 60 A load interruption without failure, critical for solenoid and pump control.
T_J max.	175 °C - Meets AEC-Q101 requirement for under-hood operation in ICE powertrain modules exposed to ambient >125 °C.

Pinout & Package

PowerFLAT 5x6 WF type C package with wettable flank leads for automated optical solder-joint inspection. Exposed drain pad on bottom surface provides primary thermal path to PCB.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	Source (S)	Low-side return path; connected to internal source metallization and top-side source bond wires - routed to ground plane for minimal loop inductance.
4	Gate (G)	Control input; requires <70 nC charge for full enhancement - designed for direct drive from 3.3 V/5 V microcontrollers or dedicated gate drivers.
5, 6, 7, 8	Drain (D)	High-current power terminal; tied to exposed copper pad on underside - must be soldered to large thermal pad for R_thJC = 0.9 °C/W performance.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including powertrain and chassis safety systems per stress test requirements (HTOL, TC, UHAST).
Wettable flank leads	Side-wettable terminations enable AOI-compatible solder joint inspection - eliminates X-ray requirement for production line quality control.
100% avalanche tested	Each unit subjected to single-pulse avalanche stress at I_AS = 60 A - guarantees ruggedness against inductive switching transients in motor drives.
Low Q_gd/Q_gs ratio	Q_gd = 5 nC vs Q_gs = 19 nC - improves Miller immunity and reduces risk of spurious turn-on during high dV/dt commutation.
Enhanced SOA at high T_J	SOA curve validated up to 175 °C - supports sustained 100 A operation at case temperatures >100 °C in confined engine bay environments.

Applications

Electric Power Steering (EPS)

Brake-by-Wire Actuators

Use Scenario: High-frequency PWM control of three-phase BLDC motor delivering assist torque up to 15 N·m.

IC Role / Device Role / Timing Role: Low-side switch in 6-phase inverter bridge; handles bidirectional current up to 250 A peak with <1.0 mΩ conduction loss.

Use Value: Enables compact inverter design with <2.5 W total conduction loss per phase at 120 A, reducing thermal derating and extending system MTBF.

Use Scenario: Driving dual redundant solenoid valves in electro-hydraulic brake (EHB) modules for pressure modulation.

IC Role / Device Role / Timing Role: High-current switch controlling 48 V solenoid coils with 10 ms turn-on/turn-off timing and 1217 A pulsed capability.

Use Value: Eliminates need for external snubbers due to 420 mJ E_AS rating, simplifying PCB layout and improving functional safety compliance (ISO 26262 ASIL D).

Engine Cooling Fan Control

Transmission Valve Body Drivers

Use Scenario: Variable-speed control of 400 W brushless cooling fan in ICE thermal management system.

IC Role / Device Role / Timing Role: High-side or low-side switch in half-bridge configuration; operates at 20 kHz PWM with <9 ns fall time.

Use Value: Reduces audible noise by enabling higher switching frequency while maintaining <0.5 W conduction loss at 30 A continuous load.

Use Scenario: Driving proportional solenoids in 8-speed automatic transmission valve bodies for precise hydraulic pressure regulation.

IC Role / Device Role / Timing Role: Current-regulated switch delivering 2–3 A DC with 100 µs response time and integrated reverse recovery handling.

Use Value: Leverages built-in body diode (t_rr = 60 ns, Q_rr = 70 nC) to eliminate external freewheeling diodes, saving 2.5 mm² board area per channel.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Infineon IPP220N04N	R_DS(on) = 0.95 mΩ at V_GS = 10 V; Q_g = 75 nC; no wettable flanks	Lacks MSL1 and wettable flank support - requires X-ray inspection for solder joint validation in automotive production.	Preferred where lower R_DS(on) outweighs optical inspection needs and AEC-Q101 requalification is feasible.
ON Semiconductor NTMFS5C676N	R_DS(on) = 1.15 mΩ at V_GS = 10 V; Q_g = 62 nC; Power56 package (no wettable flanks)	Higher R_DS(on) increases conduction loss by ~15%; different footprint prevents drop-in replacement.	Selected when gate drive efficiency is prioritized over thermal performance and board space allows package redesign.

Compared with IPP220N04N and NTMFS5C676N, STL305N4F8AG uniquely combines wettable flank leads, MSL1 rating, and 175 °C T_J in a 5x6 mm footprint - making it the only option qualified for zero-defect optical inspection in ASIL-B/C powertrain modules without footprint change.

Availability

STL305N4F8AG is available at Aetrix Electronics and suitable for automotive motor control, chassis safety, and powertrain applications requiring stable component supply across extended product lifecycles and high-reliability manufacturing environments.

Supply support for STL305N4F8AG 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities and AEC-Q100/101 certified processes.

This device belongs to ST's STripFET F8 automotive MOSFET product line, engineered specifically for high-current, high-temperature switching in ICE and hybrid vehicle subsystems where reliability, thermal efficiency, and optical inspectability are mandatory.

FAQ

Is STL305N4F8AG pin-compatible with earlier STripFET F7 MOSFETs in PowerFLAT 5x6?

No. While both use PowerFLAT 5x6, STL305N4F8AG has updated pin mapping: Drain occupies pins 5–8 (not 1–4), Source is on pins 1–3 (not 5–8), and Gate remains on pin 4. Layout revision is required to avoid short circuits or open connections.

What is the maximum recommended gate resistor value for driving STL305N4F8AG at 20 kHz PWM?

For 20 kHz operation with <14 ns t_d(on) and <9 ns t_f, a gate resistor ≤ 4.7 Ω is recommended when using a 1.5 A peak gate driver. Higher values increase switching losses; values >10 Ω degrade SOA margin during hard-switching events in motor phase legs.

Does the 1.0 mΩ R_DS(on) specification apply at junction temperatures above 125 °C?

Yes - R_DS(on) increases linearly with temperature; at T_J = 175 °C, normalized R_DS(on) is ~1.7× typical (1.7 mΩ max). The 1.0 mΩ max. is guaranteed at T_J = 25 °C; derating curves in Figure 7 confirm 1.35 mΩ at 125 °C and 1.7 mΩ at 175 °C.

Can STL305N4F8AG replace discrete SiC MOSFETs in 40 V automotive inverters?

No - while it matches 40 V blocking voltage, its 175 °C T_J and silicon-based switching speed limit it to <100 kHz operation. SiC devices offer superior high-frequency efficiency (>200 kHz) and lower Q_rr; STL305N4F8AG is optimized for cost-sensitive, thermally constrained 20–50 kHz motor drives where SiC ROI is not justified.

STL305N4F8AG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

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

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

STL305N4F8AG FAQ

1.How can I place an order for STL305N4F8AG through Aetrix?

Please submit a Request for Quotation (RFQ) for STL305N4F8AG 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 STL305N4F8AG reliable?

The price and inventory of STL305N4F8AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STL305N4F8AG is usually 5 days.

3.What payment methods are accepted for STL305N4F8AG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STL305N4F8AG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STL305N4F8AG?

STL305N4F8AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STL305N4F8AG 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 STL305N4F8AG?

For technical support, including STL305N4F8AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STL305N4F8AG requirements.

6.How does Aetrix verify that STL305N4F8AG is sourced from the original manufacturer or authorized distributors?

All STL305N4F8AG 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 STL305N4F8AG meets industry standards.

7.What is the process for return or replacement of STL305N4F8AG?

All STL305N4F8AG units undergo pre-shipment inspection (PSI). If there is an issue with STL305N4F8AG, 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 STL305N4F8AG part is unused and in its original packaging.

Return procedure for STL305N4F8AG:

1.Submit a request within 90 days.

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

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