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

STMicroelectronics STS17NH3LL

Name: STS17NH3LL
Brand: STMicroelectronics
SKU: STS17NH3LL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STS17NH3LL

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

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

Datasheet:: STS17NH3LL.pdf

Description:: MOSFET N-CH 30V 17A 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:2,108

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Product details

Overview

STS17NH3LL from STMicroelectronics is an N-channel 30 V, 17 A SO-8 Power MOSFET using STripFET™ technology for DC-DC conversion. It delivers R_DS(on) = 4.0 mΩ @ V_GS = 10 V, Q_g = 18–24 nC, and junction-to-PCB thermal resistance of 47 °C/W, enabling high-efficiency synchronous buck converters in telecom and industrial power supplies.

For engineers reviewing the STS17NH3LL datasheet, STS17NH3LL pinout, STS17NH3LL application, or STS17NH3LL equivalent, key selection criteria include its low R_DS(on) × Q_g trade-off at 4.5 V, avalanche energy rating (E_AS = 150 mJ), and SO-8 package suitability for board-level thermal management in compact 12 V input systems.

Technical Context

This MOSFET employs ST's proprietary STripFET™ process with optimized metallization to minimize conduction and switching losses simultaneously. Its gate threshold voltage (V_GS(th) = 1 V min) supports direct drive from 3.3 V or 5 V controllers, and its low C_iss (1810 pF) and C_rss (41 pF) enable fast, controlled switching with minimal Miller-induced shoot-through risk.

The device is rated for continuous drain current up to 17 A at T_C = 25°C and 10.6 A at T_C = 100°C, with pulsed capability up to 68 A. Its unclamped inductive switching performance is validated by E_AS = 150 mJ and I_AV = 7.5 A, confirming ruggedness in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum blocking voltage for 12 V input DC-DC stages with margin
R_DS(on) @ 10 V	4.0 mΩ max - Enables <1 W conduction loss at 17 A in high-current POL converters
Q_g	18–24 nC - Supports efficient 500 kHz–1 MHz switching with moderate gate drive strength
T_j max	150 °C - Allows operation in sealed enclosures with limited airflow
E_AS	150 mJ - Withstands single-pulse inductive energy without failure in synchronous rectifier mode
R_thj-pcb	47 °C/W - Achieves ~65 °C junction rise above ambient on 1 in² FR-4 with 2 oz Cu at 10 A
V_GS(th)	1.0–2.5 V - Ensures reliable turn-on with standard logic-level gate drivers

Pinout & Package

STS17NH3LL is housed in a standard SO-8 package (JEDEC MS-012AC), with exposed drain pad for enhanced thermal conduction to PCB copper. The package complies with ECOPACK® environmental requirements and features lead-free second-level interconnect.

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

Key Features

Feature	Design Value
Optimized R_DS(on) × Q_g at 4.5 V	Enables high-efficiency operation with 3.3 V/5 V gate drivers without sacrificing switching speed
Low R_thj-pcb (47 °C/W)	Reduces need for external heatsinking in space-constrained 12 V input modules
150 mJ single-pulse avalanche energy	Provides margin against transient overvoltage during load dump or inductive kickback
ECOPACK® compliant packaging	Meets RoHS and JEDEC JESD97 marking requirements for industrial and telecom use

Applications

Telecom Point-of-Load Converter

Industrial 12 V Input Buck Regulator

Use Scenario: High-density 12 V → 3.3 V/1.8 V conversion in base station power modules.

IC Role / Device Role / Timing Role: Synchronous high-side switch in fixed-frequency 500 kHz buck converter.

Use Value: 4.0 mΩ R_DS(on) limits conduction loss to ≤0.6 W at 12 A, improving system efficiency by ≥1.2% vs. legacy SO-8 MOSFETs.

Use Scenario: 12 V input step-down supply for PLC I/O modules operating at 85 °C ambient.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier in 300 kHz buck stage with integrated controller.

Use Value: 150 mJ E_AS withstands repetitive inductive transients from solenoid loads without derating.

Server VRM High-Current Phase

Automotive Body Control Module (BCM)

Use Scenario: Multiphase CPU core supply delivering up to 120 A per rail in data center servers.

IC Role / Device Role / Timing Role: Parallel-connected high-side switch in interleaved 1 MHz buck phase.

Use Value: SO-8 drain-source layout allows low-inductance paralleling; 68 A pulsed ID supports peak current demands.

Use Scenario: 12 V → 5 V/3.3 V conversion for microcontroller and sensor rails in non-safety-critical BCMs.

IC Role / Device Role / Timing Role: Primary switching FET in compact, cost-sensitive buck converter.

Use Value: 1 V V_GS(th) ensures full enhancement with automotive-grade 5 V LDO outputs, eliminating level-shifting circuitry.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 30 V Power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF7470PBF	R_DS(on) = 4.5 mΩ @ 10 V; Q_g = 21 nC; SO-8 package	Higher R_DS(on) increases conduction loss by ~12% at 15 A; identical thermal footprint	Acceptable where efficiency margin >0.5% is available and gate drive strength matches
DMN3025LSD-13	R_DS(on) = 2.5 mΩ @ 10 V; Q_g = 29 nC; SO-8 package	Lower R_DS(on) reduces conduction loss but higher Q_g increases switching loss at >600 kHz	Preferred for <500 kHz designs prioritizing conduction loss; requires stronger gate driver

Compared with IRF7470PBF and DMN3025LSD-13, STS17NH3LL offers the best balance of R_DS(on) and Q_g for 500–800 kHz DC-DC converters, with verified avalanche ruggedness critical for unregulated input conditions.

Availability

STS17NH3LL is available at Aetrix Electronics and suitable for telecom point-of-load converters, industrial 12 V input buck regulators, and server VRM phases requiring stable component supply and documented thermal performance.

Supply support for STS17NH3LL 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 industrial, automotive, and power applications.

STS17NH3LL belongs to ST's STripFET™ III Power MOSFET product line, engineered specifically for high-efficiency, high-current DC-DC conversion in space-constrained power systems.

FAQ

Is STS17NH3LL suitable for 3.3 V gate drive?

Yes. With V_GS(th) ranging from 1.0 V to 2.5 V and R_DS(on) = 5.0–5.7 mΩ @ V_GS = 4.5 V, it achieves full enhancement using standard 3.3 V logic-level drivers. Measured Q_g at 4.5 V is 18–24 nC, confirming compatibility with common gate drivers like TI UCC27524.

What is the maximum continuous current at 85 °C case temperature?

At T_C = 85 °C, the maximum continuous drain current is approximately 13.2 A. This is interpolated from the datasheet's ID vs. T_C curve and confirmed by the linear derating from 17 A at 25 °C to 10.6 A at 100 °C, assuming constant R_DS(on) and thermal resistance.

Does STS17NH3LL have integrated Schottky body diode?

No. It features a standard parasitic body diode with V_SD = 1.3 V at I_SD = 17 A and t_rr = 22–32 ns. While not a Schottky, its fast recovery and low Q_rr (1.9 nC) reduce reverse recovery loss in synchronous rectification when properly driven.

Can STS17NH3LL replace STS17NH3L in existing designs?

Yes, with verification. STS17NH3LL is the ECOPACK® (lead-free) version of STS17NH3L. Both share identical electrical specs, SO-8 mechanical outline, and thermal characteristics. The only difference is soldering profile compliance-reflow must follow JEDEC J-STD-020 for lead-free processes.

STS17NH3LL Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™

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):: 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:: 5.7mOhm @ 8.5A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 24 nC @ 4.5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 1810 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 2.7W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

STS17NH3LL FAQ

1.How can I place an order for STS17NH3LL through Aetrix?

Please submit a Request for Quotation (RFQ) for STS17NH3LL 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 STS17NH3LL reliable?

The price and inventory of STS17NH3LL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STS17NH3LL is usually 5 days.

3.What payment methods are accepted for STS17NH3LL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STS17NH3LL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STS17NH3LL?

STS17NH3LL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STS17NH3LL 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 STS17NH3LL?

For technical support, including STS17NH3LL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STS17NH3LL requirements.

6.How does Aetrix verify that STS17NH3LL is sourced from the original manufacturer or authorized distributors?

All STS17NH3LL 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 STS17NH3LL meets industry standards.

7.What is the process for return or replacement of STS17NH3LL?

All STS17NH3LL units undergo pre-shipment inspection (PSI). If there is an issue with STS17NH3LL, 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 STS17NH3LL part is unused and in its original packaging.

Return procedure for STS17NH3LL:

1.Submit a request within 90 days.

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

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