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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics STPS2L25U

Name: STPS2L25U
Brand: STMicroelectronics
SKU: STPS2L25U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS2L25U

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: STPS2L25U.pdf

Description:: DIODE SCHOTTKY 25V 2A SMB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STPS2L25U from STMicroelectronics is a 25 V, 2 A average forward current Schottky rectifier in SMB package, featuring 0.325 V typical forward voltage at 125 °C and 2 A, avalanche-rated operation, and ECOPACK2 compliance. It is engineered for synchronous rectification in DC/DC converters and battery chargers where low conduction loss and thermal efficiency are critical.

For engineers reviewing the STPS2L25U datasheet, STPS2L25U pinout, STPS2L25U application, or STPS2L25U equivalent, key selection criteria include forward voltage drop at elevated temperature, junction-to-lead thermal resistance (25 °C/W), avalanche energy rating (108 W at 10 µs), and SMB package compatibility with high-density PCB layouts.

Technical Context

This Schottky rectifier uses a planar silicon structure optimized for high-frequency switching (e.g., >100 kHz) in isolated and non-isolated DC/DC topologies. Its low VF and controlled reverse recovery minimize conduction and switching losses simultaneously.

The device operates up to 150 °C junction temperature and supports parallel operation with MOSFETs in synchronous rectification circuits. Avalanche rating ensures robustness against transient voltage spikes during inductive load switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	25 V - Maximum repetitive reverse blocking voltage; defines safe operating range in buck, flyback, and LLC secondary-side applications.
I_F(AV)	2 A - Average forward current at T_L = 125 °C (SMB); sets continuous power delivery capability in compact adapters.
V_F(typ)	0.325 V @ 125 °C, 2 A - Low conduction loss enables >94% efficiency in 5–12 V output DC/DC stages.
R_th(j-l)	25 °C/W - Junction-to-lead thermal resistance (SMB); enables direct heatsinking via PCB copper pour without external heatsink.
P_ARM	108 W @ 10 µs - Repetitive peak avalanche power; sustains surge events in telecom power supplies without failure.
T_j(max)	+150 °C - Maximum junction temperature; allows operation in sealed enclosures or high-ambient industrial environments.

Pinout & Package

STPS2L25U is packaged in SMB (DO-214AA) surface-mount case with cathode band marking. The two-terminal device has no internal gate or control pins - anode and cathode are accessed via the two leads.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connected to switch node or transformer secondary; must withstand peak reverse voltage and surge current.
Cathode	Output current exit point	Connected to output rail; low-impedance path minimizes voltage drop and improves regulation accuracy.

Key Features

Feature	Design Value
Very low forward voltage	0.325 V typ. @ 125 °C, 2 A - Reduces conduction loss by ~35% vs. standard Schottkys at same current and temperature.
Avalanche rated	108 W repetitive peak power @ 10 µs - Eliminates need for external clamping in flyback snubberless designs.
Optimized loss trade-off	Conduction/reverse leakage balance validated per AN4021 - Enables stable thermal behavior under dynamic load steps.
ECOPACK2 compliant	Lead-free, halogen-free, RoHS-compliant packaging - Meets EU Directive 2011/65/EU and IPC-J-STD-020 moisture sensitivity level 1.

Applications

Battery Charger Secondary Rectifier

Telecom DC/DC Converter Output Stage

Use Scenario: 12 V/2 A isolated flyback charger for cordless power tools with 50–100 kHz switching frequency.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing MOSFET gate drive complexity; conducts during transformer secondary positive half-cycle.

Use Value: 0.325 V VF reduces output rectification loss by 0.65 W vs. 0.65 V diode, improving thermal margin and enabling smaller heatsink area.

Use Scenario: 48 V to 5 V intermediate bus converter in telecom shelf power system with strict efficiency targets.

IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in synchronous buck topology; handles continuous 2 A load with minimal ripple.

Use Value: 25 °C/W R_th(j-l) allows direct thermal coupling to 2 cm² copper pour, maintaining T_j < 120 °C at full load without forced air.

SSD Power Rail Protection

Cordless Appliance Motor Drive Freewheeling

Use Scenario: 3.3 V standby rail protection in NVMe SSD modules exposed to hot-plug transients.

IC Role / Device Role / Timing Role: Reverse polarity and backfeed protection diode on VCC_IO rail; blocks >25 V reverse faults.

Use Value: 90 µA I_R @ 25 °C ensures <1 µW standby leakage, preserving battery life in always-on storage controllers.

Use Scenario: Brushed DC motor driver in cordless vacuum cleaner with PWM-controlled H-bridge and regenerative braking.

IC Role / Device Role / Timing Role: Freewheeling path for inductive kickback during PWM off-time; clamps voltage spike to <25 V.

Use Value: Avalanche rating absorbs 108 W transient energy per pulse, preventing MOSFET breakdown during rapid deceleration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS2L25M3T5G	Same V_RRM (25 V), higher I_F(AV) (2.5 A), VF = 0.37 V @ 125 °C - +14% conduction loss at 2 A.	Suitable for higher-current 12 V rails but less efficient at 2 A due to higher VF.	Select when board layout requires SOD-123FL footprint and thermal margin exceeds 10 °C.
Vishay VS-2EY25-M3/5BT	Same SMB package, V_RRM = 25 V, I_F(AV) = 2 A, VF = 0.42 V @ 125 °C - +29% conduction loss vs. STPS2L25U.	Lower cost alternative where efficiency loss is acceptable and avalanche rating is not required.	Select only if design tolerates 0.84 W extra dissipation at 2 A and no transient overvoltage risk exists.

Compared with NSS2L25M3T5G and VS-2EY25-M3/5BT, STPS2L25U delivers lowest VF at high temperature and certified avalanche capability - critical for unclamped flyback and motor drive freewheeling where reliability under surge is non-negotiable.

Availability

STPS2L25U is available at Aetrix Electronics and suitable for battery chargers, telecom DC/DC converters, SSD power management, and cordless appliance motor drives requiring stable component supply across multi-year production cycles.

Supply support for STPS2L25U 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

STPS2L25U belongs to ST's high-efficiency Schottky rectifier product line, developed specifically for high-frequency, space-constrained power conversion where thermal performance and surge robustness define system reliability.

FAQ

What is the maximum allowable junction temperature for STPS2L25U?

The absolute maximum junction temperature is +150 °C, verified per DS1245 Rev 7 Table 1. Operation above this limit risks irreversible degradation of the Schottky barrier. Derating is required above 125 °C ambient when using the SMB package without enhanced copper pour.

Does STPS2L25U require a heatsink in standard PCB mounting?

No external heatsink is required. With 25 °C/W junction-to-lead thermal resistance and recommended 2 cm² copper pour per lead (per Figure 10), the device maintains T_j < 130 °C at 2 A continuous in still air at 25 °C ambient.

Is STPS2L25U suitable for synchronous rectification with MOSFETs?

Yes - ST explicitly states it is "ideal for use in parallel with MOSFETs in synchronous rectification" (DS1245 page 1). Its low VF and fast recovery enable seamless integration into active rectifier control schemes without shoot-through risk.

How does the avalanche rating impact circuit design?

The 108 W repetitive avalanche power rating (at 10 µs) allows the diode to absorb inductive energy without external snubbers in flyback or buck-derived topologies. This simplifies layout, reduces component count, and improves long-term reliability under transient overload conditions.

STPS2L25U Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 25 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 450 mV @ 2 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 90 µA @ 25 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

Operating Temperature - Junction:: 150°C (Max)

STPS2L25U FAQ

1.How can I place an order for STPS2L25U through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS2L25U 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 STPS2L25U reliable?

The price and inventory of STPS2L25U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2L25U is usually 5 days.

3.What payment methods are accepted for STPS2L25U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2L25U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS2L25U?

STPS2L25U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS2L25U 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 STPS2L25U?

For technical support, including STPS2L25U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2L25U requirements.

6.How does Aetrix verify that STPS2L25U is sourced from the original manufacturer or authorized distributors?

All STPS2L25U 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 STPS2L25U meets industry standards.

7.What is the process for return or replacement of STPS2L25U?

All STPS2L25U units undergo pre-shipment inspection (PSI). If there is an issue with STPS2L25U, 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 STPS2L25U part is unused and in its original packaging.

Return procedure for STPS2L25U:

1.Submit a request within 90 days.

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

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