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

STMicroelectronics STPS3H100U

Name: STPS3H100U
Brand: STMicroelectronics
SKU: STPS3H100U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS3H100U

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: STPS3H100U.pdf

Description:: DIODE SCHOTTKY 100V 3A SMB

Quantity:: RFQ Add To RFQ list

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Inventory:7,534

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Product details

Overview

STPS3H100U from STMicroelectronics is a 100 V, 3 A average forward current power Schottky rectifier in SMB package, optimized for high-frequency DC/DC converters and AC/DC adapters. It delivers low forward voltage drop (0.68 V max at 125 °C), negligible switching losses, and avalanche-rated operation up to 2400 W peak. Its 175 °C maximum junction temperature supports compact thermal design in space-constrained power supplies.

For engineers reviewing the STPS3H100U datasheet, STPS3H100U pinout, STPS3H100U application, or STPS3H100U equivalent, key selection criteria include forward voltage vs. temperature trade-off, leakage current at elevated Tj, junction-to-lead thermal resistance (25 °C/W), and SMB footprint compatibility with automated assembly.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal-semiconductor junction to eliminate minority-carrier storage delay, enabling zero reverse recovery time and minimal switching loss in high-frequency SMPS topologies. Its avalanche capability is fully specified (2400 W at tp = 1 µs), allowing robust operation under transient overvoltage conditions without external clamping.

The device is characterized across temperature (–65 to +175 °C) and features low leakage (≤1 µA at 25 °C, ≤1 mA at 125 °C) and a well-defined VF–IF relationship-0.84 V max at 3 A/25 °C and 0.68 V max at 3 A/125 °C-supporting accurate conduction loss modeling using P = 0.6 × IF(AV) + 0.027 × IF²(RMS).

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	100 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in 48 V or 60 V bus applications.
IF(AV)	3 A - Average forward current at TL = 115 °C (SMB); sets continuous output capability in 12–24 V DC/DC stages.
VF (max)	0.68 V @ 3 A, 125 °C - Low conduction loss enables >92% efficiency in 5–12 V output converters at full load.
IR (max)	1 mA @ 125 °C - Low leakage preserves regulation margin in high-impedance feedback networks and standby modes.
Tj (max)	175 °C - Enables operation without derating in sealed enclosures or near hot components like MOSFETs or inductors.
Rth(j-l)	25 °C/W - Junction-to-lead thermal resistance allows direct PCB copper pour heatsinking without discrete heatsinks.
IFSM	75 A @ tp = 10 ms - Surge rating supports inrush current handling during cold start of isolated flyback or buck-boost converters.

Pinout & Package

STPS3H100U is housed in an SMB (DO-214AA) surface-mount package with gull-wing leads. The package meets UL94 V0 flammability rating and is lead-free per ECOPACK® standards.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to input rail or switch node; must be routed with low-inductance trace to minimize ringing during turn-off.
Cathode (K)	Forward current exit point	Connected to output filter capacitor or ground return; requires wide copper pour for thermal dissipation and low ESR path.

Key Features

Feature	Design Value
Negligible switching losses	Zero reverse recovery charge (Qrr ≈ 0) eliminates turn-off loss and EMI from diode snap-off in 300–1000 kHz converters.
Avalanche capability specified	2400 W peak avalanche power (tp = 1 µs) provides validated ruggedness against inductive kickback in unclamped topologies.
Low leakage current	≤1 µA at 25 °C and ≤1 mA at 125 °C ensures stable no-load regulation and low standby power in energy-efficient adapters.
High junction temperature capability	175 °C max Tj allows placement adjacent to hot-switching FETs or in thermally dense layouts without forced air cooling.

Applications

AC/DC Adapters

On-Board DC/DC Converters

Use Scenario: Secondary-side rectification in 5–19 V wall adapters for laptops, monitors, and IoT gateways.

IC Role / Device Role / Timing Role: Output synchronous rectifier replacement; conducts during transformer secondary voltage polarity phase.

Use Value: 0.68 V VF at 125 °C reduces conduction loss by ~25% vs. standard PN diodes, improving adapter efficiency from 82% to ≥86% at full load.

Use Scenario: Output rectification in point-of-load (POL) buck converters on server motherboards and telecom cards.

IC Role / Device Role / Timing Role: Uncontrolled freewheeling diode in non-synchronous buck stages or OR-ing function in redundant power rails.

Use Value: 25 °C/W Rth(j-l) enables direct thermal coupling to 2 oz copper planes, maintaining Tj < 130 °C at 3 A continuous without heatsink.

Industrial Power Supplies

LED Driver Secondary Rectification

Use Scenario: Output stage in DIN-rail mounted 24–48 V industrial PSUs powering PLC I/O modules and sensors.

IC Role / Device Role / Timing Role: Main output rectifier in flyback or forward converter outputs; handles both steady-state and surge currents.

Use Value: 75 A IFSM withstands repeated 500-ms inrush events during hot-plug insertion, eliminating need for series NTC thermistors.

Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting and architectural lighting systems.

IC Role / Device Role / Timing Role: High-efficiency rectifier delivering stable DC to LED string; operates continuously at elevated ambient temperatures.

Use Value: 1 mA IR max at 125 °C prevents current drift in precision CC loops, maintaining ±2% LED current accuracy over –40 to +85 °C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS310H (ON Semiconductor)	Same 100 V VRRM, 3 A IF(AV), but VF = 0.85 V max @ 125 °C; Rth(j-l) = 30 °C/W.	Higher conduction loss and thermal resistance limit use in high-density or high-ambient designs.	Select when cost sensitivity outweighs thermal or efficiency requirements in low-power adapters.
SB3100 (Vishay)	100 V VRRM, 3 A IF(AV), VF = 0.82 V max @ 125 °C; no specified avalanche rating; Rth(j-l) = 28 °C/W.	Lacks documented avalanche ruggedness, requiring external TVS protection in inductive load circuits.	Prefer for non-critical consumer power supplies where transient immunity is managed at system level.

Compared with SS310H and SB3100, STPS3H100U offers superior thermal performance (25 °C/W), lower VF (0.68 V), and guaranteed avalanche capability-making it optimal for compact, high-reliability industrial and telecom DC/DC converters where board space and transient robustness are critical.

Availability

STPS3H100U is available at Aetrix Electronics and suitable for AC/DC adapters, on-board DC/DC converters, and industrial power supplies requiring stable component supply, consistent SMB footprint, and long-term manufacturability.

Supply support for STPS3H100U 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 automotive, industrial, and consumer markets.

STPS3H100U belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency, high-efficiency secondary-side rectification in space-constrained switched-mode power supplies.

FAQ

Is STPS3H100U suitable for synchronous rectification?

No-STPS3H100U is an uncontrolled Schottky rectifier with fixed anode–cathode polarity. It cannot replace a MOSFET-based synchronous rectifier that requires gate drive control. It serves only as a passive freewheeling or output rectifier in non-synchronous topologies like standard flyback or buck converters.

What is the minimum recommended PCB copper area for thermal relief?

For SMB package STPS3H100U, ST recommends ≥40 mm² of 2 oz copper connected directly to each lead (anode and cathode). Figure 12 shows Rth(j-a) drops from ~60 °C/W (no copper) to ~35 °C/W with 5 cm² copper-enabling full 3 A operation at 70 °C ambient without airflow.

Does STPS3H100U have a qualified automotive grade variant?

No-STPS3H100U is not qualified to AEC-Q101. ST offers automotive-grade alternatives such as STPS3H100TV1 (AEC-Q101 qualified, same electrical specs, SMB package), which undergoes extended temperature cycling, humidity testing, and failure analysis per automotive reliability standards.

Can STPS3H100U replace STPS3H100UF in the same layout?

No-STPS3H100U (SMB) and STPS3H100UF (SMBflat) have different footprints and lead geometries. SMBflat has shorter leads (L1 = 0.40 mm) and reduced height, requiring separate land pattern per Figure 15. Mechanical interference and solder joint reliability will be compromised if substituted without PCB revision.

STPS3H100U 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):: 100 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 840 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 100 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

Operating Temperature - Junction:: 175°C (Max)

STPS3H100U FAQ

1.How can I place an order for STPS3H100U through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS3H100U 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 STPS3H100U reliable?

The price and inventory of STPS3H100U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS3H100U is usually 5 days.

3.What payment methods are accepted for STPS3H100U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS3H100U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS3H100U?

STPS3H100U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS3H100U 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 STPS3H100U?

For technical support, including STPS3H100U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS3H100U requirements.

6.How does Aetrix verify that STPS3H100U is sourced from the original manufacturer or authorized distributors?

All STPS3H100U 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 STPS3H100U meets industry standards.

7.What is the process for return or replacement of STPS3H100U?

All STPS3H100U units undergo pre-shipment inspection (PSI). If there is an issue with STPS3H100U, 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 STPS3H100U part is unused and in its original packaging.

Return procedure for STPS3H100U:

1.Submit a request within 90 days.

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

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