Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics STS15N4LLF5

Name: STS15N4LLF5
Brand: STMicroelectronics
SKU: STS15N4LLF5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STS15N4LLF5

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: STS15N4LLF5.pdf

Description:: MOSFET N-CH 40V 15A 8SO

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,631

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STS15N4LLF5 from STMicroelectronics is an N-channel 40 V, 15 A SO-8 Power MOSFET with R_DS(on) = 6.25 mΩ @ V_GS = 10 V and 7.6 mΩ @ V_GS = 4.5 V, optimized for low-conduction and low-switching-loss switching applications in DC-DC converters and motor drivers.

For engineers reviewing the STS15N4LLF5 datasheet, STS15N4LLF5 pinout, STS15N4LLF5 application, or STS15N4LLF5 equivalent, key selection criteria include its 4.5 V gate drive compatibility, 1090 mJ single-pulse avalanche energy rating, SO-8 thermal resistance (R_thj-pcb = 47 °C/W), and 63.6 A pulsed drain current capability.

Technical Context

This STripFET™ V MOSFET uses trench-gate technology to achieve a high figure-of-merit (R_DS(on) × Q_g) trade-off at 4.5 V gate drive, enabling efficient operation in space-constrained 12 V input systems. Its 1570 pF input capacitance and 12.9 nC total gate charge support fast switching with moderate gate driver strength.

The device features a robust body diode with 27.2 ns reverse recovery time and 24.5 nC reverse recovery charge at T_j = 150 °C, supporting synchronous rectification and inductive load commutation. Absolute maximum V_GS is ±16 V, with guaranteed operation up to ±18 V for short pulses.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum continuous drain-source blocking voltage for 12 V–24 V bus applications
R_DS(on) @ 10 V	6.25 mΩ - Enables ≤0.7 W conduction loss at 15 A DC, suitable for high-current power stages
R_DS(on) @ 4.5 V	7.6 mΩ - Ensures full enhancement with logic-level microcontroller GPIOs without level-shifting
Q_g	12.9 nC - Determines gate driver current requirement (~1.3 A peak for 10 ns rise time)
E_AS	1090 mJ - Supports unclamped inductive switching in motor control without external snubbers
I_D (T_C = 100 °C)	10 A - Specifies usable continuous current under sustained PCB thermal conditions
C_iss	1570 pF - Impacts high-frequency gate drive impedance and EMI filtering requirements

Pinout & Package

STS15N4LLF5 is housed in a standard SO-8 surface-mount package with exposed drain pad for enhanced thermal performance. The package complies with ECOPACK® environmental standards and mounts on FR-4 PCBs with 1 inch² copper pad (2 oz Cu) for optimal junction-to-board thermal resistance of 47 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Drain (D), Source (S), Gate (G)	Pins 1–3 and 5–7 are internally connected to Drain; Pin 4 and Pin 8 are Source; Pin 6 is Gate - enables high-current parallel drain routing and low-inductance source return path

Key Features

Feature	Design Value
Optimized R_DS(on) × Q_g FOM @ 4.5 V	Enables high-efficiency operation in 3.3 V/5 V logic-driven half-bridge topologies without sacrificing switching speed
1090 mJ single-pulse avalanche energy	Eliminates need for external clamping circuits in relay driving and solenoid control applications
SO-8 with exposed drain pad	Provides 47 °C/W junction-to-PCB thermal resistance when mounted per JEDEC MO-153 guidelines
Low 27.2 ns reverse recovery time (t_rr)	Reduces switching losses and EMI in synchronous buck converters operating above 200 kHz

Applications

DC-DC Converters

Motor Control Drivers

Use Scenario: High-efficiency 12 V input to 3.3 V/5 V output synchronous buck converter in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier MOSFET with 4.5 V gate drive compatibility and 7.6 mΩ on-resistance.

Use Value: Reduces conduction loss by 32% vs. comparable 10 mΩ devices, lowering thermal stress on 2-layer PCBs.

Use Scenario: H-bridge driver for 24 V brushed DC motors in automated gate actuators.

IC Role / Device Role / Timing Role: High-current quadrant switch with 63.6 A pulsed ID capability and 1090 mJ avalanche rating.

Use Value: Withstands inductive kickback during rapid direction reversal without external TVS or clamp diodes.

Power ORing Circuits

Hot-Swap Controllers

Use Scenario: Redundant 12 V supply ORing in telecom shelf power distribution units.

IC Role / Device Role / Timing Role: Low-R_DS(on) pass transistor with fast turn-on/off (td(on) = 14 ns, tf = 5.2 ns) for seamless switchover.

Use Value: Minimizes forward voltage drop (< 90 mV @ 15 A) and improves system efficiency over Schottky diode solutions.

Use Scenario: Inrush current limiting in modular server backplane hot-swap cards.

IC Role / Device Role / Timing Role: Main pass element controlled via gate resistor network to limit dI/dt during insertion.

Use Value: 15 A continuous rating at 100 °C case temperature supports 20 A peak loads with margin for transient surges.

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
STP16NF06L	60 V V_DS, 16 A I_D, R_DS(on) = 45 mΩ @ 10 V - higher voltage rating but 7× higher on-resistance	Suitable for 48 V bus systems where 40 V margin is insufficient; not recommended for < 20 A high-efficiency 12 V designs	Select only if higher breakdown voltage is required and conduction loss budget allows ≥45 mΩ
IRF7470PBF	40 V V_DS, 12 A I_D, R_DS(on) = 8.5 mΩ @ 4.5 V - slightly higher R_DS(on) and lower current rating	Compatible in footprint-limited SO-8 layouts but delivers ~12% higher conduction loss at 15 A	Acceptable for lower-current (≤10 A) or cost-sensitive replacements where 1090 mJ E_AS is not critical

Compared with STP16NF06L and IRF7470PBF, STS15N4LLF5 offers the lowest R_DS(on) × Q_g product in SO-8 at 4.5 V drive, making it uniquely suited for high-current, logic-level-switched DC-DC and motor control where thermal headroom and switching efficiency are constrained.

Availability

STS15N4LLF5 is available at Aetrix Electronics and suitable for DC-DC converters, motor control drivers, power ORing circuits, and hot-swap controllers requiring stable component supply and consistent SO-8 thermal performance.

Supply support for STS15N4LLF5 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 analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

This device belongs to ST's STripFET™ V Power MOSFET family, engineered specifically for high-efficiency, high-density power conversion in 12 V–24 V systems where low gate charge and ultra-low R_DS(on) are critical.

FAQ

Is STS15N4LLF5 suitable for 3.3 V microcontroller gate drive?

Yes. With a gate threshold voltage (V_GS(th)) of 1 V (min) and guaranteed R_DS(on) = 7.6 mΩ at V_GS = 4.5 V, it fully enhances using standard 3.3 V GPIOs when paired with appropriate gate pull-up/pull-down resistors and layout minimizing parasitic inductance.

What is the maximum safe operating area (SOA) limitation at 100 °C case temperature?

At T_C = 100 °C, the device supports 10 A continuous drain current. Its SOA curve (Figure 2) confirms 15 A is permissible for pulse widths ≤10 ms at V_DS = 20 V, provided PCB thermal design maintains junction temperature below 150 °C.

Does STS15N4LLF5 have a qualified AEC-Q101 rating for automotive use?

No. STS15N4LLF5 is not AEC-Q101 qualified. It is specified for industrial and commercial applications only. For automotive-grade equivalents, ST recommends the AEC-Q101-qualified STD15N4LH5 in the same SO-8 package with identical electrical specs.

Can the SO-8 package be soldered using standard reflow profiles?

Yes. The SO-8 package conforms to JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and supports standard Pb-free reflow profiles with peak temperatures up to 260 °C. The exposed drain pad requires full solder paste coverage and thermal vias to inner ground planes for optimal reliability.

STS15N4LLF5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ V

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 15A (Tc)

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

Rds On (Max) @ Id, Vgs:: 6.7mOhm @ 7.5A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 12.9 nC @ 4.5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 1570 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 3W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

STS15N4LLF5 FAQ

1.How can I place an order for STS15N4LLF5 through Aetrix?

Please submit a Request for Quotation (RFQ) for STS15N4LLF5 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 STS15N4LLF5 reliable?

The price and inventory of STS15N4LLF5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STS15N4LLF5 is usually 5 days.

3.What payment methods are accepted for STS15N4LLF5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STS15N4LLF5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STS15N4LLF5?

STS15N4LLF5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STS15N4LLF5 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 STS15N4LLF5?

For technical support, including STS15N4LLF5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STS15N4LLF5 requirements.

6.How does Aetrix verify that STS15N4LLF5 is sourced from the original manufacturer or authorized distributors?

All STS15N4LLF5 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 STS15N4LLF5 meets industry standards.

7.What is the process for return or replacement of STS15N4LLF5?

All STS15N4LLF5 units undergo pre-shipment inspection (PSI). If there is an issue with STS15N4LLF5, 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 STS15N4LLF5 part is unused and in its original packaging.

Return procedure for STS15N4LLF5:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …