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

STMicroelectronics STL17N3LLH6

Name: STL17N3LLH6
Brand: STMicroelectronics
SKU: STL17N3LLH6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STL17N3LLH6

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: 8-PowerVDFN

Datasheet:: STL17N3LLH6.pdf

Description:: MOSFET N-CH 30V 17A POWERFLAT

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Product details

Overview

STL17N3LLH6 from STMicroelectronics is an N-channel 30 V Power MOSFET in PowerFLAT™ 3.3 × 3.3 package, featuring 0.0038 Ω typ. R_DS(on) at V_GS = 10 V, 17 A continuous drain current (T_pcb = 25 °C), and 68 A pulsed drain capability. It delivers low gate charge (17 nC) and high avalanche ruggedness for high-efficiency switching in compact DC-DC converters and motor drivers.

For engineers reviewing the STL17N3LLH6 datasheet, STL17N3LLH6 pinout, STL17N3LLH6 application, or STL17N3LLH6 equivalent, this device is selected for high-current, low-voltage switching where PCB thermal resistance (R_thj-pcb = 63.5 °C/W) and gate drive efficiency are critical design constraints.

Technical Context

This MOSFET employs ST's 6th-generation STripFET™ VI DeepGATE™ technology with a redesigned gate structure to minimize R_DS(on) × Q_g product - achieving industry-benchmark conduction and switching trade-offs. Its optimized cell layout supports high current density while maintaining robust unclamped inductive switching (UIS) performance.

The device operates with ±20 V gate-source voltage rating and exhibits stable threshold voltage (V_GS(th) = 1.0 V typ.) across temperature. Its low output capacitance (C_oss = 290 pF) and reverse transfer capacitance (C_rss = 176 pF) enable fast, low-loss hard-switching up to 1 MHz in synchronous buck topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum blocking voltage compatible with 24 V industrial bus and 12 V automotive auxiliary systems.
R_DS(on) typ.	0.0038 Ω @ V_GS = 10 V, I_D = 8.5 A - Enables <100 mW conduction loss at 10 A, reducing heatsink requirements.
I_D cont.	17 A @ T_pcb = 25 °C - Sustains high load current on standard FR-4 PCB with 1 in² copper area.
Q_g	17 nC @ V_DD = 24 V, I_D = 17 A - Reduces gate driver power dissipation and enables use of low-power controllers.
t_f	12 ns - Supports high-frequency PWM operation with minimal switching transition losses.
E_oss	0.35 µJ @ V_DS = 24 V - Low stored output energy improves light-load efficiency in resonant and soft-switching designs.

Pinout & Package

STL17N3LLH6 uses the PowerFLAT™ 3.3 × 3.3 surface-mount package with exposed drain pad for thermal and electrical connection. The package has 8 terminals arranged in a single-row, dual-side configuration with drain connected to pins 5–8 and the bottom thermal pad.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3 (S)	Source	Common source node for internal parallel cells; low-inductance connection reduces shoot-through risk in half-bridge layouts.
4 (G)	Gate	Single gate input terminal; designed for standard CMOS-level drive (0–10 V) without level-shifting.
5, 6, 7, 8 (D)	Drain	High-current drain path tied to exposed copper pad; requires soldered thermal pad for rated power dissipation.

Key Features

Feature	Design Value
R_DS(on) × Q_g benchmark	0.065 Ω·nC - Minimizes combined conduction and switching loss in high-frequency SMPS.
High avalanche ruggedness	Rated for unclamped inductive switching (UIS) up to 68 A pulse - eliminates need for external snubbers in relay/motor drive circuits.
Low gate drive power loss	Q_gs + Q_gd = 14 nC - Reduces average gate current to <1 mA at 500 kHz, enabling direct MCU GPIO drive.
Thermally enhanced PowerFLAT™	R_thj-pcb = 63.5 °C/W (steady-state) - Achieves 150 °C junction temperature with only 2 oz Cu and 1 in² pad area.

Applications

DC-DC Buck Converter

BLDC Motor Phase Switch

Use Scenario: High-efficiency 12 V to 3.3 V/5 V point-of-load converter in industrial PLC modules.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier switch operating at 500 kHz with 10–15 A peak load current.

Use Value: 0.0038 Ω R_DS(on) limits conduction loss to ≤570 mW at 12 A, enabling natural convection cooling.

Use Scenario: 24 V three-phase BLDC driver for HVAC fan actuators with space-constrained PCB layout.

IC Role / Device Role / Timing Role: High-current phase leg switch handling 17 A continuous current per phase with 10 kHz PWM commutation.

Use Value: 12 ns fall time and 17 nC Q_g reduce switching loss to <120 µJ per transition, improving motor efficiency by ≥1.8%.

USB-C PD Power Path

Hot-Swap Controller FET

Use Scenario: 20 V/5 A USB-C Power Delivery power path switch in portable docking stations.

IC Role / Device Role / Timing Role: In-line pass FET controlling power delivery between source and sink with overcurrent protection.

Use Value: 0.0045 Ω max. R_DS(on) ensures <450 mV drop at 10 A, staying within USB-C voltage tolerance limits.

Use Scenario: 30 V hot-swap circuit protecting backplane supplies in telecom line cards.

IC Role / Device Role / Timing Role: Inrush-limiting and fault-isolation FET triggered by dedicated hot-swap controller.

Use Value: 68 A pulsed ID capability withstands 50 ms inrush surges; 1.1 V V_SD forward drop minimizes diode conduction loss during reverse recovery.

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
Infineon BSC014N04LS6	R_DS(on) = 1.4 mΩ @ 10 V (lower), but Q_g = 22 nC (higher); PowerSO-8 package with higher R_thj-pcb.	Better conduction loss at high current, but higher gate drive demand and inferior PCB thermal performance.	Select when board-level thermal management allows larger footprint and gate driver can supply >2× peak current.
Vishay SiR872DP	R_DS(on) = 3.7 mΩ @ 10 V (comparable), Q_g = 15 nC (slightly lower); PowerPAK® 3.3 × 3.3 package with similar R_thj-pcb.	Nearly identical switching performance; slightly better C_rss/C_iss ratio improves EMI in noise-sensitive applications.	Preferred for EMI-critical designs where dV/dt-induced shoot-through must be minimized.

Compared with BSC014N04LS6 and SiR872DP, STL17N3LLH6 offers the lowest R_DS(on) × Q_g product in its class and superior avalanche energy rating (E_AS = 120 mJ), making it optimal for ruggedized 24 V industrial switching where reliability under transient overload is mandatory.

Availability

STL17N3LLH6 is available at Aetrix Electronics and suitable for DC-DC converters, BLDC motor drives, USB-C power path control, and hot-swap protection circuits requiring stable component supply and long-term industrial lifecycle support.

Supply support for STL17N3LLH6 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

This device belongs to ST's STripFET™ VI Power MOSFET product line, engineered specifically for high-current, low-voltage switching in space-constrained power conversion systems where thermal performance and switching efficiency are co-optimized.

FAQ

What is the maximum safe operating temperature for STL17N3LLH6?

The device supports junction temperatures from –55 °C to +150 °C. For reliable long-term operation, ST recommends limiting T_j to ≤130 °C under continuous load. At T_pcb = 25 °C, the 2 W total dissipation limit corresponds to ~47 °C rise above ambient, verified via R_thj-pcb = 63.5 °C/W under steady-state conditions on 1 in² FR-4 board.

Can STL17N3LLH6 be driven directly by a 3.3 V microcontroller GPIO?

No - the gate threshold voltage (V_GS(th)) is 1.0 V min., but full enhancement requires ≥4.5 V for R_DS(on) ≤ 0.0073 Ω. Driving with 3.3 V yields significantly higher on-resistance and risk of thermal runaway. A dedicated gate driver (e.g., STMicroelectronics TD350) or level-shifter is required for robust 10 V gate drive.

Does STL17N3LLH6 include an integrated body diode, and what are its recovery characteristics?

Yes - it features a monolithic source-drain diode with 17 A continuous forward current rating and 68 A pulsed capability. Reverse recovery time (t_rr) is 24 ns at I_SD = 17 A and di/dt = 100 A/µs, with Q_rr = 16.8 nC. These values enable efficient synchronous rectification without external Schottky diodes in medium-frequency buck converters.

How does the PowerFLAT™ 3.3 × 3.3 package affect PCB layout and thermal design?

The package requires a minimum 3.1 mm × 3.1 mm exposed copper pad connected to ground plane via ≥6 thermal vias (0.3 mm diameter). ST's recommended footprint (Figure 20) specifies 2.25 mm × 2.25 mm solder mask opening to ensure reliable solder joint formation. Insufficient pad area increases R_thj-pcb beyond 63.5 °C/W, degrading current derating and thermal stability.

STL17N3LLH6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: DeepGATE™, STripFET™ VI

Package/Case:: 8-PowerVDFN

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 17A (Tc)

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

Rds On (Max) @ Id, Vgs:: 4.5mOhm @ 8.5A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 17 nC @ 4.5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1690 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 2W (Ta), 50W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerFlat™ (3.3x3.3)

STL17N3LLH6 FAQ

1.How can I place an order for STL17N3LLH6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STL17N3LLH6 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 STL17N3LLH6 reliable?

The price and inventory of STL17N3LLH6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STL17N3LLH6 is usually 5 days.

3.What payment methods are accepted for STL17N3LLH6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STL17N3LLH6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STL17N3LLH6?

STL17N3LLH6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STL17N3LLH6 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 STL17N3LLH6?

For technical support, including STL17N3LLH6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STL17N3LLH6 requirements.

6.How does Aetrix verify that STL17N3LLH6 is sourced from the original manufacturer or authorized distributors?

All STL17N3LLH6 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 STL17N3LLH6 meets industry standards.

7.What is the process for return or replacement of STL17N3LLH6?

All STL17N3LLH6 units undergo pre-shipment inspection (PSI). If there is an issue with STL17N3LLH6, 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 STL17N3LLH6 part is unused and in its original packaging.

Return procedure for STL17N3LLH6:

1.Submit a request within 90 days.

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

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