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

STMicroelectronics STS25NH3LL

Name: STS25NH3LL
Brand: STMicroelectronics
SKU: STS25NH3LL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STS25NH3LL

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

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

Datasheet:: STS25NH3LL.pdf

Description:: MOSFET N-CH 30V 25A 8SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STS25NH3LL from STMicroelectronics is an N-channel 30 V, 25 A Power MOSFET in SO-8 package using STripFET™ III technology, optimized for DC/DC converters with R_DS(on) = 0.0032 Ω @ V_GS = 10 V and Q_g = 30 nC, enabling high-efficiency synchronous rectification at high output current.

For engineers reviewing the STS25NH3LL datasheet, STS25NH3LL pinout, STS25NH3LL application, or STS25NH3LL equivalent, key selection criteria include low conduction loss (R_DS(on) ≤ 3.5 mΩ), fast switching (t_r = 50 ns), avalanche ruggedness (E_AS = 1.3 J), thermal resistance (R_thj-pcb = 47 °C/W), and SO-8 footprint compatibility with standard PCB layout practices.

Technical Context

This MOSFET employs ST's STripFET™ III process with advanced metallization to minimize R_DS(on) × Q_g trade-off at 4.5 V gate drive, supporting efficient operation in synchronous buck converters. Its 30 V V_DS rating and 25 A continuous drain current (T_C = 25 °C) target mid-power point-of-load regulation.

The device features integrated source-drain diode with t_rr = 32 ns and Q_rr = 34 nC, enabling controlled body-diode commutation in hard-switched topologies. Avalanche capability (I_AV = 12.5 A, E_AS = 1.3 J) supports unclamped inductive load robustness without external snubbers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Supports input rails up to 24 V DC/DC stages with margin against transients
R_DS(on)	0.0032 Ω @ V_GS = 10 V - Delivers ≤ 1 W conduction loss at 25 A, critical for thermal management
Q_g	30 nC - Enables fast turn-on with moderate gate drive strength (e.g., 1 A peak)
t_r/t_f	50/8 ns - Reduces switching transition time, lowering overlap losses in PWM operation
E_AS	1.3 J - Withstands single-pulse inductive energy without failure in typical buck converter layouts
R_thj-pcb	47 °C/W - Achieves junction temperature rise < 100 °C under 3.2 W dissipation on 1-inch² FR-4 board
I_D (cont)	25 A @ T_C = 25 °C - Sustains full-rated output current in thermally managed PCB designs

Pinout & Package

STS25NH3LL is housed in a standard SO-8 surface-mount package (ECOPACK® compliant, lead-free), with exposed drain pad for enhanced thermal performance. Pin numbering follows JEDEC MS-012AA outline.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal; requires 10 V drive for full enhancement; max ±18 V rating
2 (S)	Source	Reference node for gate drive; tied to power ground in low-side switch configuration
3 (D)	Drain	Main current path output; internally connected to exposed pad for thermal conduction
4 (S)	Source	Second source connection; paralleled with Pin 2 to reduce source inductance
5 (S)	Source	Third source connection; reduces common-source inductance in high-dI/dt switching
6 (D)	Drain	Second drain connection; tied to exposed pad to minimize drain loop inductance
7 (D)	Drain	Third drain connection; enhances current sharing and thermal spreading across package
8 (D)	Drain	Fourth drain connection; completes low-inductance, high-current drain path to PCB copper

Key Features

Feature	Design Value
Optimized R_DS(on) × Q_g	Enables >95% efficiency in 12 V → 1.2 V/25 A buck converters at 500 kHz
Low R_DS(on) @ 4.5 V	0.004 Ω enables direct drive from 5 V logic or controller outputs without level shifters
SO-8 with exposed drain pad	Reduces thermal resistance by ~30% vs standard SO-8, improving power density
Fast body diode recovery	t_rr = 32 ns / Q_rr = 34 nC minimizes reverse recovery loss in synchronous rectification
Avalanche-rated	Rated for single-pulse E_AS = 1.3 J, eliminating need for external clamping in many DC/DC layouts

Applications

Server VRM

Industrial PLC I/O Module

Use Scenario: High-current CPU core voltage regulation in 1U rack servers requiring 1.2 V/25 A with tight thermal constraints.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier in multiphase buck converter, switching at 300–600 kHz.

Use Value: 0.0032 Ω R_DS(on) limits conduction loss to 2 W, enabling compact heatsink-free design on multilayer PCB.

Use Scenario: 24 V DC input to isolated 5 V/3 A auxiliary supply in programmable logic controller backplane.

IC Role / Device Role / Timing Role: Primary-side switch in flyback converter operating in CCM with 100 kHz switching frequency.

Use Value: 30 V V_DS rating provides 20% margin over 24 V rail; avalanche ruggedness eliminates snubber complexity.

Telecom Base Station PSU

Automotive ADAS Camera Power

Use Scenario: Intermediate bus converter (48 V → 12 V/15 A) powering RF amplifiers in macrocell base stations.

IC Role / Device Role / Timing Role: High-side switch in active clamp forward topology with ZVS-assisted turn-on.

Use Value: Q_g = 30 nC allows clean gate drive with 1 Ω series resistor, reducing EMI during 200 kHz transitions.

Use Scenario: 12 V → 3.3 V/2 A point-of-load regulator supplying image sensor and ISP in rear-view camera module.

IC Role / Device Role / Timing Role: Synchronous rectifier in small-footprint buck converter with space-constrained 4-layer PCB.

Use Value: SO-8 package fits standard layout; R_thj-pcb = 47 °C/W ensures <110 °C junction temp at full load without thermal vias.

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
IRF7470PBF	R_DS(on) = 3.4 mΩ @ 10 V; Q_g = 32 nC; same SO-8 package	Slightly higher conduction loss; identical switching profile and thermal behavior	Preferred where second-source qualification is required and 0.2 mΩ R_DS(on) penalty is acceptable
DMN3025LSD-13	R_DS(on) = 3.0 mΩ @ 10 V; Q_g = 25 nC; SO-8 with dual drain/source pins	Lower gate charge improves switching efficiency above 1 MHz; tighter R_DS(on) tolerance	Recommended for high-frequency (>1 MHz) DC/DC where gate drive loss dominates total loss

Compared with IRF7470PBF and DMN3025LSD-13, STS25NH3LL offers best-in-class R_DS(on) × Q_g balance at 4.5 V drive, superior avalanche energy rating (1.3 J vs ≤0.8 J), and proven reliability in industrial DC/DC reference designs.

Availability

STS25NH3LL is available at Aetrix Electronics and suitable for server VRMs, industrial PLC I/O modules, telecom base station PSUs, and automotive ADAS camera power supplies requiring stable component supply and long-lifecycle support.

Supply support for STS25NH3LL 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 consumer markets.

STS25NH3LL belongs to ST's STripFET™ III Power MOSFET product line, engineered specifically for high-efficiency, high-current DC/DC conversion in space-constrained and thermally demanding applications.

FAQ

Is STS25NH3LL suitable for synchronous rectification in buck converters?

Yes. STS25NH3LL is explicitly designed for synchronous rectification in DC/DC converters, with low R_DS(on) (0.0032 Ω), fast switching (t_r = 50 ns), and low Q_rr (34 nC) to minimize body-diode conduction loss and reverse recovery stress in high-frequency buck topologies.

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

The maximum continuous drain current is 18 A at T_C = 100 °C, as specified in Table 2 of the datasheet. This derating reflects thermal limitations under sustained high-temperature operation and must be applied when ambient or PCB thermal conditions exceed 25 °C.

Does STS25NH3LL have a qualified automotive grade variant?

No. STS25NH3LL is not qualified to AEC-Q101 and is not recommended for automotive safety-critical systems. ST offers automotive-grade alternatives such as STD25NH3LL (AEC-Q101 qualified) with identical electrical specs but extended temperature and reliability validation.

Can STS25NH3LL be used in linear regulator applications?

No. STS25NH3LL is optimized for switching operation only. Its SO-8 package lacks sufficient thermal capability for linear-mode power dissipation, and its safe operating area (SOA) is rated for pulsed switching-not DC bias-conditions per Figure 2 in the datasheet.

STS25NH3LL Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ III

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:: 25A (Tc)

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

Rds On (Max) @ Id, Vgs:: 3.5mOhm @ 12.5A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 40 nC @ 4.5 V

Vgs (Max):: ±18V

Input Capacitance (Ciss) (Max) @ Vds:: 4450 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 3.2W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

STS25NH3LL FAQ

1.How can I place an order for STS25NH3LL through Aetrix?

Please submit a Request for Quotation (RFQ) for STS25NH3LL 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 STS25NH3LL reliable?

The price and inventory of STS25NH3LL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STS25NH3LL is usually 5 days.

3.What payment methods are accepted for STS25NH3LL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STS25NH3LL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STS25NH3LL?

STS25NH3LL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STS25NH3LL 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 STS25NH3LL?

For technical support, including STS25NH3LL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STS25NH3LL requirements.

6.How does Aetrix verify that STS25NH3LL is sourced from the original manufacturer or authorized distributors?

All STS25NH3LL 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 STS25NH3LL meets industry standards.

7.What is the process for return or replacement of STS25NH3LL?

All STS25NH3LL units undergo pre-shipment inspection (PSI). If there is an issue with STS25NH3LL, 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 STS25NH3LL part is unused and in its original packaging.

Return procedure for STS25NH3LL:

1.Submit a request within 90 days.

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

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