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

STMicroelectronics STS25NH3LL-E

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

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Part No.:: STS25NH3LL-E

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

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

Datasheet:: STS25NH3LL-E.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:6,888

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Product details

Overview

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

For engineers reviewing the STS25NH3LL-E datasheet, STS25NH3LL-E pinout, STS25NH3LL-E application, or STS25NH3LL-E equivalent, key selection criteria include low conduction loss at 25 A continuous current, fast switching (t_r = 50 ns), avalanche ruggedness (E_AS = 1.3 J), and SO-8 thermal performance on FR-4 PCBs.

Technical Context

This MOSFET employs ST's STripFET™ III process with optimized cell pitch and metallization to achieve ultra-low R_DS(on) × Q_g trade-off at 4.5 V gate drive, enabling high-frequency synchronous rectification in buck converters. Its 30 V V_DS rating targets 12 V and 5 V input rails.

The device features a built-in source-drain diode with t_rr = 32 ns and Q_rr = 34 nC, supporting hard-switched topologies. Thermal resistance R_thj-pcb = 47 °C/W on 1-inch² FR-4 board enables 3.2 W power dissipation at T_C = 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - supports 12 V input DC/DC stages with 2× voltage margin
R_DS(on)	0.0032 Ω @ V_GS = 10 V - delivers ≤2 W conduction loss at 25 A
I_D (cont)	25 A @ T_C = 25 °C - rated for high-current point-of-load outputs
Q_g	30 nC - enables efficient 500 kHz–1 MHz switching with moderate gate drive
E_AS	1.3 J - withstands unclamped inductive energy in synchronous buck freewheeling
t_r/t_f	50 ns / 8 ns - supports fast edge rates with minimal switching loss
V_SD	1.3 V @ I_SD = 25 A - limits body-diode conduction loss during dead-time

Pinout & Package

STS25NH3LL-E is housed in a standard SO-8 surface-mount package (JEDEC MS-012) with exposed drain pad for thermal enhancement. Dimensions conform to ST's mechanical drawing: D = 4.8–5.0 mm, E = 5.8–6.2 mm, e = 1.27 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Drain (pins 1–4, 6–8), Source (pin 5), Gate (pin 2)	Pins 1–4 and 6–8 are internally paralleled drain terminals; pin 5 is common source; pin 2 is gate - SO-8 layout enables low-inductance, high-current routing with thermal pad soldered to PCB ground plane

Key Features

Feature	Design Value
STripFET™ III process	Enables 0.0032 Ω R_DS(on) in SO-8 - eliminates need for larger packages in 25 A POL designs
R_DS(on) × Q_g optimization @ 4.5 V	Reduces combined conduction + switching loss by >15% vs prior-gen SO-8 MOSFETs at 500 kHz
ECOPACK® RoHS-compliant packaging	Lead-free second-level interconnect meets JEDEC JESD97 - suitable for lead-free reflow assembly
Avalanche-rated operation	Withstands 12.5 A non-repetitive avalanche current - enhances reliability in overvoltage transients

Applications

Server VRM

Point-of-Load Converter

Use Scenario: High-density 12 V input → 1.2 V/25 A output stage in rack-server CPU VRMs.

IC Role / Device Role / Timing Role: Synchronous rectifier in buck converter low-side switch position.

Use Value: 0.0032 Ω R_DS(on) minimizes I²R loss at full load, sustaining >92% efficiency at 25 A.

Use Scenario: Compact 5 V input → 3.3 V/20 A module for FPGA power delivery.

IC Role / Device Role / Timing Role: Low-side FET in fixed-frequency 1 MHz synchronous buck regulator.

Use Value: 30 nC Q_g allows clean 10 V gate drive with <1 µs turn-on delay, reducing dead-time loss.

Industrial PLC I/O Module

Telecom DC/DC Brick

Use Scenario: 24 V bus-powered I/O driver with integrated protection and regulation.

IC Role / Device Role / Timing Role: Main switching element in isolated flyback secondary-side synchronous rectifier.

Use Value: 1.3 V V_SD reduces body-diode conduction loss during startup and fault recovery.

Use Scenario: 48 V input → 12 V/15 A intermediate bus converter in telecom shelf systems.

IC Role / Device Role / Timing Role: Primary-side high-side switch in phase-shifted full-bridge topology.

Use Value: 1.3 J E_AS ensures robustness against transformer leakage inductance spikes.

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) = 0.0037 Ω @ 10 V; Q_g = 36 nC; SO-8 package	Higher switching loss due to +20% Q_g; identical thermal footprint	Acceptable where gate drive capability exceeds 1 A peak and efficiency target is relaxed by ≤0.5%
DMN3025LFG-7	R_DS(on) = 0.0025 Ω @ 10 V; Q_g = 42 nC; lead-free SOT-23-3 package	Lower R_DS(on) but limited to 8 A continuous; not pin-compatible	Only viable for lower-current designs (<10 A); requires PCB redesign and derating for thermal management

Compared with IRF7470PBF and DMN3025LFG-7, STS25NH3LL-E delivers the best balance of low R_DS(on), moderate Q_g, and SO-8 current-handling capability - making it optimal for 20–25 A DC/DC applications where thermal and layout constraints preclude TO-220 or DPAK alternatives.

Availability

STS25NH3LL-E is available at Aetrix Electronics and suitable for server VRMs, point-of-load converters, industrial PLC I/O modules, and telecom DC/DC bricks requiring stable component supply across multi-year production cycles.

Supply support for STS25NH3LL-E 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

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

FAQ

Is STS25NH3LL-E suitable for 12 V automotive applications?

No - STS25NH3LL-E is not qualified for automotive use. Its datasheet specifies no AEC-Q101 qualification, and ST explicitly states non-automotive-grade parts carry no warranty for automotive applications. It lacks extended temperature range validation beyond −55 °C to +175 °C junction, and has no automotive-specific reliability testing or PPAP documentation.

What is the maximum recommended PCB copper area for thermal performance?

The datasheet specifies R_thj-pcb = 47 °C/W when mounted on a 1 inch² (645 mm²), 2 oz Cu FR-4 board. Increasing copper area beyond this yields diminishing returns; doubling area reduces thermal resistance by only ~15%. For 25 A continuous operation, a minimum 1 inch² thermal pad connected to internal ground planes is required to maintain T_j < 125 °C.

Does STS25NH3LL-E have integrated ESD protection on the gate?

Yes - the device includes gate oxide protection rated to ±100 nA IGSS at ±18 V V_GS, consistent with Class 1B HBM ESD robustness (≥2 kV). However, no explicit HBM or CDM test data is published; external gate resistors (≥10 Ω) and TVS clamping are still recommended in high-noise environments like motor drives or industrial SMPS.

Can STS25NH3LL-E be used in parallel configurations?

Yes - its positive temperature coefficient of R_DS(on) (confirmed in Fig. 11) ensures inherent current sharing. Parallel operation requires matched gate drive paths, symmetrical PCB layout, and individual 1–2 Ω gate resistors to damp oscillation. Derate total current by 15% versus sum of individual ratings to account for thermal coupling and parameter spread.

STS25NH3LL-E 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-E FAQ

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

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

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

3.What payment methods are accepted for STS25NH3LL-E?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STS25NH3LL-E?

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

Once your STS25NH3LL-E 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-E?

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

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

All STS25NH3LL-E 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-E meets industry standards.

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

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

Return procedure for STS25NH3LL-E:

1.Submit a request within 90 days.

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

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