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

STMicroelectronics STPST2H100UF

Name: STPST2H100UF
Brand: STMicroelectronics
SKU: STPST2H100UF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPST2H100UF

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-221AA, SMB Flat Leads

Datasheet:: STPST2H100UF.pdf

Description:: 100 V, 2 A POWER SCHOTTKY TRENCH

Quantity:: RFQ Add To RFQ list

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Inventory:8,870

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Product details

Overview

STPST2H100UF from STMicroelectronics is a 2 A, 100 V Schottky trench rectifier in SMB Flat package, optimized for high-frequency SMPS with low conduction and switching losses. It features 0.620 V typical forward voltage at 2 A/125 °C, 175 °C max junction temperature, and avalanche-rated robustness for auxiliary power supplies in telecom and smart metering.

For engineers reviewing the STPST2H100UF datasheet, STPST2H100UF pinout, STPST2H100UF application, or STPST2H100UF equivalent, this device delivers verified trade-off advantages in VF/IR performance, thermal resilience in flat packages, and compatibility with ST VIPer controllers and power transistors in compact flyback and DC/DC designs.

Technical Context

This Schottky rectifier uses ST's proprietary trench technology to achieve superior forward voltage versus reverse leakage balance-0.620 V typ. at 2 A/125 °C and only 0.45 mA IR at 70 V/125 °C-enabling high-efficiency operation in space-constrained, thermally demanding topologies.

Its SMB Flat package provides 11 °C/W junction-to-lead thermal resistance and supports lead-free reflow assembly. The device is avalanche-tested (IAS = 3 A, L = 300 µH), enabling reliable unclamped inductive switching in freewheeling and OR-ing roles without external snubbers.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	100 V - Withstands repetitive reverse voltages up to 100 V without breakdown in flyback clamp or output rectification.
IF(AV)	2 A at TL = 150 °C - Sustains continuous forward current in SMB Flat package with adequate PCB copper area (≥120 cm²).
VF (typ.)	0.620 V at 2 A / 125 °C - Reduces conduction loss to ~1.24 W (P ≈ 0.480×IF + 0.095×IF²), critical for >90% efficiency targets.
Tj (max)	+175 °C - Enables operation in sealed enclosures or high ambient environments (e.g., smart metering) without derating.
Rth(j-l)	11 °C/W - Enables direct thermal coupling to PCB copper, simplifying heatsinkless design in <5 W auxiliary rails.
IAS	3 A - Supports safe energy dissipation (EAS ≈ 0.675 mJ) during unclamped inductive turn-off in freewheeling paths.

Pinout & Package

SMB Flat package: surface-mount, 2-terminal, gull-wing leads; dimensions 5.10–5.60 mm × 3.30–3.95 mm × 0.90–1.10 mm (L × W × H); RoHS-compliant, ECOPACK2 certified.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to switch node or transformer secondary in flyback/freewheeling path; requires low-inductance layout.
Cathode (K)	Forward current exit / reverse blocking terminal	Connected to output rail or ground return; serves as reference for voltage clamping and OR-ing control logic.

Key Features

Feature	Design Value
ST trench Schottky architecture	Delivers best-in-class VF/IR trade-off: 0.620 V @ 2 A/125 °C and 0.45 mA @ 70 V/125 °C-minimizing both conduction and reverse recovery loss.
Avalanche-rated (IAS = 3 A)	Eliminates need for external clamping components in unclamped inductive switching, reducing BOM count and board area in flyback snubberless designs.
ECOPACK2 compliance	Meets strict environmental standards (RoHS, halogen-free, lead-free), supporting global regulatory compliance for industrial and telecom equipment.
High Tj capability (175 °C)	Enables use in thermally isolated locations (e.g., enclosed smart meters) without forced air or heatsinks, improving system reliability and longevity.

Applications

Telecom Auxiliary Supply

Flyback DC/DC Converter

Use Scenario: Provides isolated 5 V/12 V bias supply for PoE-powered switches and base station control circuitry.

IC Role / Device Role / Timing Role: Output rectifier in primary-side regulated flyback, handling 2 A average load with minimal voltage drop.

Use Value: 0.620 V VF at 125 °C reduces heat generation by ~18% vs. standard Schottkys, allowing smaller PCB copper area and eliminating heatsinks.

Use Scenario: Secondary-side rectifier in compact 10–25 W offline flyback converters for LED drivers and industrial sensors.

IC Role / Device Role / Timing Role: High-frequency synchronous rectification alternative-no gate drive needed, but lower loss than MOSFETs below 200 kHz.

Use Value: Low Qrr and zero minority-carrier storage enable clean turn-off waveforms, reducing EMI filtering requirements and transformer stress.

Smart Meter Power Rail

OR-Ring Protection

Use Scenario: Powers microcontroller and RF module from split-phase AC input via auxiliary winding in utility-grade smart meters.

IC Role / Device Role / Timing Role: Input rectifier feeding linear regulator or buck converter; operates continuously at 70–100 °C ambient.

Use Value: 175 °C Tj rating ensures stable operation over full lifetime without thermal derating-even under sealed enclosure conditions.

Use Scenario: Dual-input redundancy path in battery-backed systems (e.g., UPS, industrial PLC I/O modules).

IC Role / Device Role / Timing Role: Low-VF anode-cathode path enables automatic source selection with <100 mV forward drop penalty vs. ideal diode controllers.

Use Value: Eliminates control IC complexity and quiescent current overhead while maintaining <1.5 µA reverse leakage at 125 °C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS2H100UF	Same SMB Flat package, identical 2 A/100 V rating, but uses planar-not trench-Schottky process; VF = 0.75 V typ. at 2 A/25 °C.	Higher conduction loss (~1.5 W vs. 1.24 W) limits use in thermally constrained 15+ W designs.	Select when cost sensitivity outweighs efficiency needs and thermal margin exceeds 20 °C.
SS210H	2 A/100 V SMB Flat Schottky from Diodes Inc.; VF = 0.82 V typ. at 2 A/25 °C; no avalanche rating; Rth(j-l) = 13 °C/W.	Lacks IAS specification and higher VF increases loss by ~35% at full load-unsuitable for high-reliability telecom or metering.	Acceptable only for non-critical, low-temperature consumer DC/DC where BOM cost is primary driver.

Compared with STPS2H100UF and SS210H, STPST2H100UF delivers measurable thermal and efficiency advantage: its trench architecture lowers VF by 0.13–0.20 V across operating temperature, directly reducing junction temperature rise by 12–18 °C at 2 A, extending lifetime in sealed applications.

Availability

STPST2H100UF is available at Aetrix Electronics and suitable for telecom auxiliary supplies, flyback DC/DC converters, and smart meter power rails requiring stable component supply, long-term lifecycle support, and ECOPACK2 compliance.

Supply support for STPST2H100UF 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 analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

STPST2H100UF belongs to ST's trench Schottky rectifier product line-engineered specifically for high-frequency, high-efficiency SMPS in space- and thermal-constrained applications such as telecom, server, and smart infrastructure.

FAQ

What is the maximum allowable PCB copper area for thermal management of STPST2H100UF?

At TL = 150 °C, the SMB Flat package requires ≥120 cm² total copper area (distributed under both leads) to sustain 2 A average current without exceeding 175 °C junction temperature. This is based on Rth(j-a) = 4.5 °C/W at SCu = 120 cm² per Figure 12 in DS14190 Rev 3.

Is STPST2H100UF suitable for synchronous rectification replacement?

No-it is a passive Schottky rectifier, not a synchronous rectifier IC or MOSFET driver. However, its low VF and zero reverse recovery make it a preferred alternative to active synchronous solutions in <25 W flyback designs where gate drive complexity and cost must be minimized.

Does STPST2H100UF require a heatsink in standard FR4 PCB layouts?

No heatsink is required if minimum recommended copper area (≥120 cm²) is implemented per lead, and ambient temperature remains ≤75 °C. Its 11 °C/W Rth(j-l) enables efficient conduction cooling directly into PCB copper planes.

How does the avalanche rating (IAS = 3 A) impact layout in flyback snubberless designs?

The 3 A single-pulse avalanche rating allows safe energy absorption (EAS ≈ 0.675 mJ) during transformer leakage inductance turn-off. Layout must minimize parasitic inductance in the cathode loop (<5 nH) to prevent voltage overshoot beyond VRRM during IAS events.

STPST2H100UF Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ECOPACK®2

Package/Case:: DO-221AA, SMB Flat Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

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

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 805 mV @ 2 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 2.7 µA @ 100 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMBflat

Operating Temperature - Junction:: 175°C

STPST2H100UF FAQ

1.How can I place an order for STPST2H100UF through Aetrix?

Please submit a Request for Quotation (RFQ) for STPST2H100UF 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 STPST2H100UF reliable?

The price and inventory of STPST2H100UF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST2H100UF is usually 5 days.

3.What payment methods are accepted for STPST2H100UF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST2H100UF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPST2H100UF?

STPST2H100UF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPST2H100UF 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 STPST2H100UF?

For technical support, including STPST2H100UF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST2H100UF requirements.

6.How does Aetrix verify that STPST2H100UF is sourced from the original manufacturer or authorized distributors?

All STPST2H100UF 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 STPST2H100UF meets industry standards.

7.What is the process for return or replacement of STPST2H100UF?

All STPST2H100UF units undergo pre-shipment inspection (PSI). If there is an issue with STPST2H100UF, 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 STPST2H100UF part is unused and in its original packaging.

Return procedure for STPST2H100UF:

1.Submit a request within 90 days.

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

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