Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics STPST5H100AFY

Name: STPST5H100AFY
Brand: STMicroelectronics
SKU: STPST5H100AFY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STPST5H100AFY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: SOD-128

Datasheet:: STPST5H100AFY.pdf

Description:: AUTOMOTIVE 100 V, 5 A POWER SCHO

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,779

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STPST5H100AFY from STMicroelectronics is an AEC-Q101-qualified 5 A, 100 V automotive Schottky trench rectifier in SOD128Flat package, featuring 0.55 V typical forward voltage at 125 °C and 100% avalanche tested. It delivers low conduction, reverse, and switching losses for high-frequency DC/DC converters in ECU power supplies and LED lighting systems.

For engineers reviewing the STPST5H100AFY datasheet, STPST5H100AFY pinout, STPST5H100AFY application, or STPST5H100AFY equivalent, key selection criteria include its 175 °C max junction temperature, 10 °C/W junction-to-lead thermal resistance, ECOPACK2 compliance, and flat-package space savings in constrained automotive PCB layouts.

Technical Context

This device uses ST's proprietary trench Schottky technology to optimize the VF/IR trade-off on a given silicon die area-enabling higher efficiency than planar Schottkys at 100 V rating. Its low recovery charge and absence of minority-carrier storage make it suitable for >100 kHz switching in flyback and synchronous rectification topologies.

The SOD128Flat package provides direct thermal path from junction to PCB copper via two anode terminals, with validated 10 °C/W Rth(j-l) and -40 °C to +175 °C operating range-critical for under-hood automotive environments where thermal cycling and ambient extremes demand robustness without heatsinks.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	100 V - Maximum repetitive reverse blocking voltage; supports 48 V system-derived rails with margin against transients in automotive DC/DC stages.
IF(AV)	5 A at TL = 120 °C - Continuous forward current capability with derating defined by lead temperature, enabling compact layout without forced air cooling.
VF (typ.)	0.55 V at IF = 2.5 A, Tj = 125 °C - Low conduction loss directly reduces I²R heating and improves efficiency in high-duty-cycle LED drivers.
IAS	9 A - Single-pulse avalanche current rating at 25 °C; ensures ruggedness during unclamped inductive switching events in OR-ing and freewheeling applications.
Rth(j-l)	10 °C/W - Junction-to-lead thermal resistance for SOD128Flat; enables predictable thermal design using PCB copper as primary heat spreader.
Tj (max)	+175 °C - Maximum junction temperature; certified for under-hood operation including engine bay and transmission control modules.
ECOPACK2	Compliant - Halogen-free, RoHS-compliant packaging meeting automotive environmental standards without compromising thermal or electrical performance.

Pinout & Package

SOD128Flat is a surface-mount, dual-anode, single-cathode flat package with exposed metal leads for thermal conduction. Dimensions: 4.7 mm × 2.4 mm × 1.0 mm (L × W × H), lead pitch 2.13 mm, with two anode terminals sharing common cathode connection.

Pin/Terminal	Circuit Role	Design Meaning
Anode 1 / Anode 2	Parallel anode inputs	Two shorted anode terminals reduce effective series resistance and improve current sharing; optimized for high-current, low-VF rectification paths.
Cathode	Common output terminal	Single cathode pad carries full 5 A average current; designed for direct connection to ground plane or bulk capacitor return path.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability across temperature, humidity, and mechanical stress-required for ECU and lighting module deployment.
Low VF/IR trade-off	0.55 V VF at 125 °C and <3.2 mA IR at 70 V/125 °C enables simultaneous low conduction loss and minimal leakage in hot environments.
100% avalanche tested	Every unit undergoes unclamped inductive switching test (EAS = ½ × L × IAS²); eliminates field failure risk in flyback snubberless designs.
Flat, space-saving package	SOD128Flat footprint occupies 11.3 mm² PCB area-40% smaller than TO-277A-ideal for dense automotive PCBs with height constraints ≤1.03 mm.
PPAP capable	Full production process documentation and statistical process control data available per AIAG requirements for Tier-1 automotive sourcing.

Applications

Automotive LED Headlamp Driver

Flyback DC/DC Converter

Use Scenario: High-brightness LED array powered from 12 V battery with PWM dimming and thermal foldback.

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

Use Value: 0.55 V VF minimizes power loss at 3–5 A load, reducing heatsink size while maintaining >92% efficiency at 100 kHz switching.

Use Scenario: Isolated 12 V to 3.3 V/5 V supply for ADAS camera module with strict EMI and size limits.

IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in discontinuous conduction mode (DCM) flyback.

Use Value: Low recovery charge prevents voltage overshoot and reduces snubber losses, enabling smaller RC networks and lower radiated emissions.

ECU Power Supply Input Stage

Reverse Polarity Protection

Use Scenario: Main 12 V input conditioning for engine control unit with load dump immunity and cold-crank support.

IC Role / Device Role / Timing Role: Input rectifier and transient clamping element in OR-ing configuration with backup source.

Use Value: 175 °C Tj rating and 9 A IAS withstand capability ensure survival during 120 V/100 ms load dump pulses without derating.

Use Scenario: Protection circuit for USB-C PD port or CAN transceiver power rail against accidental reverse battery connection.

IC Role / Device Role / Timing Role: Low-loss series blocking diode placed before LDO or DC/DC controller input.

Use Value: 0.52 V VF at 25 °C cuts forward drop by >30% vs. standard Schottky, preserving >4.8 V at 2 A for downstream 5 V logic rails.

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, 25 °C; TO-277 package; Rth(j-c) = 2.5 °C/W.	Larger footprint (6.7 mm × 4.2 mm); requires case-mount thermal interface; not AEC-Q101 qualified.	Select when higher surge current (120 A IFSM) is prioritized over automotive qualification and board space.
ON Semiconductor SB5100	5 A, 100 V, VF = 0.85 V @ 5 A, 25 °C; DO-214AA package; Tj(max) = 150 °C; no avalanche rating.	Higher VF increases conduction loss by ~40%; limited to cabin-grade ambient (≤105 °C); no production avalanche screening.	Acceptable for cost-sensitive non-safety-critical interior modules where thermal margin exceeds 25 °C.

Compared with VS-5EY10-M3 and SB5100, STPST5H100AFY offers superior thermal efficiency (10 °C/W vs. ≥2.5 °C/W), guaranteed avalanche ruggedness, and full AEC-Q101 compliance-making it the only choice for under-hood ECU and headlamp applications demanding zero field failures.

Availability

STPST5H100AFY is available at Aetrix Electronics and suitable for automotive LED lighting, flyback topology power supplies, and ECU power supply designs requiring stable component supply across extended temperature and long lifecycle commitments.

Supply support for STPST5H100AFY 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 automotive, industrial, and consumer markets.

STPST5H100AFY belongs to ST's automotive-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability DC/DC conversion in harsh-environment vehicle subsystems-from lighting to powertrain control.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance in SOD128Flat?

For STPST5H100AFY in SOD128Flat, thermal resistance junction-to-ambient drops from 45 °C/W (no copper) to 3.5 °C/W with 5 cm² of 70 µm copper per lead. ST recommends ≥3 cm² total copper area under both anode pads and cathode pad, connected via multiple thermal vias to inner ground planes for sustained 5 A operation at 120 °C lead temperature.

Does STPST5H100AFY require a heatsink in automotive under-hood applications?

No external heatsink is required. The SOD128Flat package relies on PCB copper as the primary heat spreader. With ≥4 cm² of 2-oz copper per terminal and 6+ thermal vias per pad, STPST5H100AFY maintains Tj ≤155 °C at 5 A/125 °C ambient-verified per AN5088 thermal mounting guidelines and DS14183 Figure 10.

How does the 100% avalanche test impact reliability in flyback snubberless designs?

Each STPST5H100AFY unit is subjected to unclamped inductive switching with 9 A peak current and 300 µH inductance, verifying EAS ≥1.2 mJ. This ensures no latent damage occurs during worst-case MOSFET turn-off events in snubberless flyback converters-eliminating infant mortality and enabling 15-year field life in safety-critical lighting systems.

Can STPST5H100AFY replace standard Schottky diodes like SB5100 in existing designs?

Yes-with layout adaptation. STPST5H100AFY has identical 100 V rating and 5 A current but uses SOD128Flat instead of DO-214AA. Footprint change requires pad revision (4.7 mm × 2.4 mm vs. 7.1 mm × 6.2 mm), yet delivers 30% lower VF and 25 °C higher Tj rating-justifying redesign for improved efficiency and under-hood compatibility.

STPST5H100AFY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ECOPACK®2

Package/Case:: SOD-128

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:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD128Flat

Operating Temperature - Junction:: -40°C ~ 175°C

STPST5H100AFY FAQ

1.How can I place an order for STPST5H100AFY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPST5H100AFY 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 STPST5H100AFY reliable?

The price and inventory of STPST5H100AFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST5H100AFY is usually 5 days.

3.What payment methods are accepted for STPST5H100AFY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST5H100AFY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPST5H100AFY?

STPST5H100AFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPST5H100AFY 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 STPST5H100AFY?

For technical support, including STPST5H100AFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST5H100AFY requirements.

6.How does Aetrix verify that STPST5H100AFY is sourced from the original manufacturer or authorized distributors?

All STPST5H100AFY 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 STPST5H100AFY meets industry standards.

7.What is the process for return or replacement of STPST5H100AFY?

All STPST5H100AFY units undergo pre-shipment inspection (PSI). If there is an issue with STPST5H100AFY, 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 STPST5H100AFY part is unused and in its original packaging.

Return procedure for STPST5H100AFY:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…