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

STMicroelectronics STPST5H100SF

Name: STPST5H100SF
Brand: STMicroelectronics
SKU: STPST5H100SF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPST5H100SF

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-277, 3-PowerDFN

Datasheet:: STPST5H100SF.pdf

Description:: 100 V, 5 A POWER SCHOTTKY TRENCH

Quantity:: RFQ Add To RFQ list

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Inventory:4,714

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Product details

Overview

STPST5H100SF from STMicroelectronics is a 5 A, 100 V Schottky trench rectifier in PSMC (TO-277A) package, optimized for high-frequency SMPS with low conduction and switching losses. It features 0.550 V typical forward voltage at 5 A/125 °C, 175 °C max junction temperature, and avalanche-tested ruggedness. Used in telecom auxiliary supplies and flyback converters where thermal efficiency and space-constrained layout are critical.

For engineers reviewing the STPST5H100SF datasheet, STPST5H100SF pinout, STPST5H100SF application, or STPST5H100SF equivalent, this page delivers verified electrical specs, thermal resistance data, real-world use cases in DC/DC and LED lighting, and validated alternative diodes with documented parameter differences.

Technical Context

This device leverages ST's proprietary trench Schottky technology to achieve superior VF/IR trade-off versus planar Schottkys - typ. VF = 0.550 V at 5 A/125 °C and IR ≤ 6.5 mA at 70 V/125 °C. Its 1.8 °C/W junction-to-case thermal resistance enables high-power density mounting on PCB copper pads without external heatsinks.

The PSMC (TO-277A) package integrates a thermally efficient metal tab for conduction cooling and supports unclamped inductive switching with 9 A single-pulse avalanche current (IAS), making it suitable for freewheeling and OR-ing in 100–500 kHz SMPS topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Withstands repetitive reverse voltage up to 100 V without breakdown in flyback or boost output stages.
I_F(AV)	5 A at T_c = 160 °C - Sustains continuous forward current of 5 A when case temperature is held at 160 °C via PCB copper area.
V_F (typ.)	0.550 V at 5 A / 125 °C - Low conduction loss reduces power dissipation by ~30% vs. standard Schottkys in 12–48 V auxiliary rails.
R_th(j-c)	1.8 °C/W - Enables direct thermal coupling to PCB copper; 10 cm² pad yields R_th(j-a) ≈ 4.5 °C/W for ambient-limited designs.
I_AS	9 A - Avalanche-rated for robustness during transient overvoltage events in unclamped inductive switching circuits.
T_j(max)	175 °C - Supports operation in sealed enclosures or high-ambient environments like smart metering and server PSUs.

Pinout & Package

PSMC (TO-277A) is a surface-mount, thermally enhanced flat package with integrated metal tab for conduction cooling. It has two terminals: anode and cathode, both accessible via solderable leads and the exposed tab (cathode-connected).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point under forward bias	Soldered to input rail or switch node; requires thermal relief for reflow compatibility.
Cathode	Current exit point under forward bias; connected to tab	Tab must be soldered to large copper pour for thermal management; electrically tied to output return path.

Key Features

Feature	Design Value
ST trench Schottky architecture	Delivers 0.550 V V_F at 5 A/125 °C - 12% lower than comparable planar Schottkys, reducing conduction loss in 24 V auxiliary supplies.
Avalanche energy rating	9 A I_AS with 300 µH inductance - withstands unclamped inductive transients in OR-ing and freewheeling applications without failure.
ECOPACK2 compliance	Lead-free, RoHS-compliant, halogen-free epoxy - meets IPC-J-STD-609 Class 1a requirements for industrial and telecom end equipment.
Flat thermal package (PSMC)	1.8 °C/W R_th(j-c) - allows >8 W power dissipation with 10 cm² 70 µm Cu pad, eliminating need for discrete heatsinks in compact SMPS.

Applications

Telecom Auxiliary Power Supply

Server PSU Flyback Converter

Use Scenario: Provides isolated 5 V/3.3 V standby rail in multi-output telecom PSUs operating at 250 kHz.

IC Role / Device Role / Timing Role: Output rectifier in secondary-side synchronous or quasi-resonant flyback stage.

Use Value: 0.550 V V_F minimizes dropout and improves light-load efficiency; 175 °C T_j(max) ensures reliability in sealed chassis.

Use Scenario: Rectifies 12 V output in server mainboard auxiliary supply with tight thermal constraints.

IC Role / Device Role / Timing Role: Freewheeling diode in active-clamp flyback topology operating at 300 kHz.

Use Value: Low Q_rr and 9 A I_AS suppress voltage spikes during MOSFET turn-on, reducing EMI filter size.

Smart Metering Power Module

Industrial LED Driver Secondary Side

Use Scenario: Powers microcontroller and RF module from 24 V AC/DC converter in DIN-rail mounted smart meters.

IC Role / Device Role / Timing Role: OR-ing diode enabling dual-input redundancy between primary and backup supplies.

Use Value: Low V_F prevents reverse current leakage and maintains >92% efficiency across -40 to +85 °C ambient range.

Use Scenario: Rectifies constant-current output in isolated LED driver for street lighting with 100–277 VAC input.

IC Role / Device Role / Timing Role: Output rectifier in flyback-derived constant-current topology running at 65 kHz.

Use Value: Flat PSMC package fits narrow PCB slots; 1.8 °C/W R_th(j-c) sustains 5 A load without derating at 70 °C board temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-5EY10-M3	5 A/100 V, VF = 0.62 V @ 5 A/125 °C, R_th(j-c) = 2.5 °C/W, SMB-Flat package	Higher VF increases conduction loss by ~13%; lower thermal performance limits power density in space-constrained layouts.	Select when SMB footprint compatibility is required and thermal margin exceeds 15 °C.
ON Semiconductor SB5100	5 A/100 V, VF = 0.72 V @ 5 A/25 °C, no avalanche rating, DO-214AA package	Higher VF and absence of IAS rating reduce robustness in inductive switching; larger package increases board area by 40%.	Choose only for cost-sensitive, non-avalanche-critical 50–100 kHz applications with ample thermal headroom.

Compared with VS-5EY10-M3 and SB5100, STPST5H100SF delivers lower conduction loss, superior thermal resistance, and guaranteed avalanche ruggedness - critical for high-reliability flyback and OR-ing in telecom and industrial power modules.

Availability

STPST5H100SF is available at Aetrix Electronics and suitable for telecom auxiliary power supply, server PSU flyback converters, and smart metering power modules requiring stable component supply and long-term lifecycle support.

Supply support for STPST5H100SF 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

STPST5H100SF belongs to ST's trench Schottky rectifier product line, engineered specifically for high-efficiency, high-frequency switched-mode power supplies where low VF, high T_j, and avalanche ruggedness are mandatory.

FAQ

What is the maximum allowable case temperature for continuous 5 A operation?

The datasheet specifies I_F(AV) = 5 A at T_c = 160 °C for the PSMC (TO-277A) package. This requires a minimum 10 cm² copper area (70 µm thick) on FR4 PCB to maintain thermal resistance below 4.5 °C/W. Exceeding 160 °C case temperature causes current derating per Figure 4.

Is STPST5H100SF suitable for synchronous rectification replacement?

No - STPST5H100SF is a passive Schottky rectifier, not a synchronous rectifier IC or MOSFET controller. It replaces standard diodes in freewheeling or OR-ing roles but cannot substitute for active gate-driven MOSFETs used in synchronous rectification topologies.

Does the PSMC (TO-277A) package require thermal vias under the tab?

Thermal vias are recommended but not mandatory. The tab is cathode-connected and designed for conduction cooling into a solid copper pour. Adding ≥6 thermal vias (0.3 mm diameter, filled with solder) beneath the tab reduces R_th(j-a) by ~15%, improving power handling in high-ambient environments.

How does STPST5H100SF compare to standard silicon PN rectifiers in flyback applications?

Compared to 100 V PN rectifiers (e.g., 1N5408), STPST5H100SF eliminates reverse recovery charge (Q_rr ≈ 0), reducing switching losses and EMI. Its 0.55 V V_F cuts conduction loss by >50%, enabling higher efficiency and cooler operation at 200–500 kHz switching frequencies.

STPST5H100SF Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ECOPACK®2

Package/Case:: TO-277, 3-PowerDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 5A

Voltage - Forward (Vf) (Max) @ If:: 680 mV @ 5 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 11.5 µA @ 100 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-277A (SMPC)

Operating Temperature - Junction:: 175°C

STPST5H100SF FAQ

1.How can I place an order for STPST5H100SF through Aetrix?

Please submit a Request for Quotation (RFQ) for STPST5H100SF 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 STPST5H100SF reliable?

The price and inventory of STPST5H100SF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST5H100SF is usually 5 days.

3.What payment methods are accepted for STPST5H100SF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST5H100SF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPST5H100SF?

STPST5H100SF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPST5H100SF 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 STPST5H100SF?

For technical support, including STPST5H100SF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST5H100SF requirements.

6.How does Aetrix verify that STPST5H100SF is sourced from the original manufacturer or authorized distributors?

All STPST5H100SF 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 STPST5H100SF meets industry standards.

7.What is the process for return or replacement of STPST5H100SF?

All STPST5H100SF units undergo pre-shipment inspection (PSI). If there is an issue with STPST5H100SF, 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 STPST5H100SF part is unused and in its original packaging.

Return procedure for STPST5H100SF:

1.Submit a request within 90 days.

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

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