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

STMicroelectronics STPS3H100AFY

Name: STPS3H100AFY
Brand: STMicroelectronics
SKU: STPS3H100AFY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS3H100AFY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: SOD-128

Datasheet:: STPS3H100AFY.pdf

Description:: DIODE SCHOTT 100V 3A SOD128FLAT

Quantity:: RFQ Add To RFQ list

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Inventory:35,867

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Product details

Overview

STPS3H100AFY from STMicroelectronics is an automotive-grade high-voltage Schottky rectifier in SOD128Flat package, rated for 100 V repetitive peak reverse voltage, 3 A average forward current, and 175 °C maximum junction temperature. It delivers low forward voltage drop (0.57 V typ. at 125 °C, 3 A) and negligible switching losses, enabling efficient DC-DC conversion in engine control units and ADAS power supplies.

For engineers reviewing the STPS3H100AFY datasheet, STPS3H100AFY pinout, STPS3H100AFY application, or STPS3H100AFY equivalent, key selection criteria include its AEC-Q101 qualification, avalanche-rated 172 W peak power, thermal resistance of 16 °C/W (junction-to-lead), low leakage (1.5 µA at 25 °C), and ECOPACK®-compliant lead-free packaging.

Technical Context

This Schottky rectifier uses a planar metal-silicon junction optimized for high-frequency operation in automotive SMPS, with avalanche capability validated per AEC-Q101 stress conditions. Its thermal design supports continuous operation up to 175 °C junction temperature under defined PCB copper area and lead thermal path constraints.

The device exhibits a well-characterized trade-off between forward voltage (VF = 0.57–0.61 V at 125 °C, 3 A) and reverse leakage (0.6–1.7 mA at 125 °C, 100 V), enabling stable performance across -40 to +175 °C ambient without thermal runaway when mounted on appropriate heatsinked leads.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	100 V - Maximum repetitive reverse blocking voltage sustained across full operating temperature range (-40 to +175 °C)
IF(AV)	3 A - Continuous average forward current at TL = 140 °C with 50% duty-cycle square pulse
VF(typ.)	0.57 V - Typical forward voltage drop at 125 °C and 3 A, directly determining conduction loss in high-efficiency converters
IR(max)	1.7 mA - Maximum reverse leakage at 125 °C and 100 V, critical for standby power budgeting in always-on automotive modules
Rth(j-l)	16 °C/W - Junction-to-lead thermal resistance, defining minimum required PCB copper area for thermal management
PARM	172 W - Repetitive peak avalanche power at tp = 10 µs and Tj = 125 °C, enabling robust transient surge handling
Tj(max)	175 °C - Maximum allowable junction temperature, supporting under-hood placement without derating

Pinout & Package

SOD128Flat is a surface-mount, flat-lead, single-diode package with two terminals: Anode (A) and Cathode (K). The package features exposed metal leads for enhanced thermal dissipation and complies with ECOPACK® environmental standards.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to input rail in buck/boost topologies; must be routed with low-inductance trace for high-frequency stability
Cathode (K)	Forward current exit / reverse voltage reference	Connected to switching node or output capacitor; serves as return path for avalanche energy during transients

Key Features

Feature	Design Value
Negligible switching losses	Enables >95% efficiency in 300–1000 kHz automotive DC-DC converters without reverse recovery penalty
Avalanche specification	Rated for 172 W repetitive avalanche pulses (10 µs), protecting against inductive kickback in solenoid drivers and motor controllers
High junction temperature capability	Operates continuously at 175 °C junction temperature, eliminating need for forced cooling in compact ECU enclosures
Low leakage current	1.5 µA max at 25 °C enables <10 µW standby loss in always-on telematics modules
ECOPACK® compliance	Lead-free, halogen-free, UL94 V0 epoxy ensures RoHS/REACH compliance and long-term reliability in harsh automotive environments

Applications

Engine Control Unit (ECU) Power Supply

Advanced Driver Assistance Systems (ADAS) DC-DC Converter

Use Scenario: Regulating 12 V battery input to stable 3.3 V/5 V rails for microcontrollers and sensors in under-hood ECUs.

IC Role / Device Role / Timing Role: High-efficiency synchronous rectifier in secondary-side of isolated flyback converter.

Use Value: Low VF and high Tj rating reduce thermal footprint and eliminate need for heatsinks in space-constrained engine bay mounting.

Use Scenario: Providing isolated, low-noise 5 V supply for radar processing units and camera modules in ADAS domain controllers.

IC Role / Device Role / Timing Role: Output rectifier in high-frequency resonant LLC converter operating at 500 kHz.

Use Value: Negligible reverse recovery minimizes EMI generation near sensitive RF receivers, meeting CISPR 25 Class 5 limits.

Automotive Infotainment System DC-DC Stage

Electric Power Steering (EPS) Auxiliary Supply

Use Scenario: Converting 12 V battery to 1.2 V/1.8 V for SoC and memory in head-unit systems requiring low standby consumption.

IC Role / Device Role / Timing Role: Secondary-side Schottky rectifier in multi-output forward converter with burst-mode operation.

Use Value: Sub-µA leakage at 25 °C ensures <5 µW quiescent loss, extending battery runtime during vehicle sleep mode.

Use Scenario: Generating auxiliary 15 V rail for EPS motor gate drivers and position sensor interfaces.

IC Role / Device Role / Timing Role: Freewheeling diode in H-bridge snubber network and output rectifier in auxiliary buck converter.

Use Value: Avalanche rating withstands 100 V+ inductive spikes from motor phase commutation, preventing catastrophic failure during emergency steering maneuvers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS3H100MX	Same SOD128Flat package, 100 V VRRM, but higher VF (0.82 V typ. at 125 °C, 3 A) and lower Tj(max) (150 °C)	Limited to under-hood ambient ≤125 °C; unsuitable for direct replacement in 175 °C junction-limited designs	Select only if thermal margin allows higher conduction loss and lower temperature rating.
Vishay VS-3EYH01-M3	TO-277 package (not SMD), 100 V VRRM, 3 A IF(AV), VF = 0.65 V typ. at 125 °C, Rth(j-l) = 20 °C/W	Requires through-hole assembly and larger board area; inferior thermal path increases risk of thermal runaway at high load	Use only when legacy TO-277 footprint is mandated and PCB layout cannot accommodate SOD128Flat.

Compared with NSS3H100MX and VS-3EYH01-M3, STPS3H100AFY provides superior thermal performance (175 °C Tj, 16 °C/W Rth(j-l)) and lowest VF in its class, making it optimal for space- and thermally constrained automotive power stages where efficiency and reliability are co-prioritized.

Availability

STPS3H100AFY is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, infotainment power supplies, and electric power steering auxiliary rails requiring stable component supply across automotive production lifecycles.

Supply support for STPS3H100AFY 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

STPS3H100AFY belongs to ST's automotive-qualified Schottky rectifier product line, engineered specifically for high-reliability, high-temperature DC-DC conversion in safety-critical vehicle subsystems.

FAQ

Is STPS3H100AFY qualified for automotive use?

Yes. STPS3H100AFY is fully AEC-Q101 qualified and PPAP capable, with guaranteed electrical and thermal performance across -40 to +175 °C junction temperature. It meets stringent automotive reliability requirements including HTOL, temperature cycling, and humidity testing per AEC-Q101 Rev D.

What is the recommended PCB layout for thermal management?

For optimal thermal performance, mount STPS3H100AFY on FR4 PCB with ≥2 cm² of 35 µm copper per lead (per Figure 8), using thermal vias under each lead to inner ground planes. Maintain ≥0.5 mm clearance from adjacent components to avoid localized hot spots above 150 °C.

Does STPS3H100AFY support avalanche energy absorption in real-world circuits?

Yes. STPS3H100AFY is specified for 172 W repetitive avalanche power at 10 µs pulse width and 125 °C junction temperature. This enables reliable clamping of inductive transients in motor drive freewheeling paths and relay coil suppression without external TVS devices.

Can STPS3H100AFY replace standard PN-junction rectifiers in existing designs?

Yes, with design validation. Its zero reverse recovery eliminates switching losses and EMI associated with PN diodes, but requires checking layout parasitics and verifying that lower VF does not cause unintended current imbalance in parallel configurations. Thermal derating must also be re-evaluated due to higher peak junction temperatures.

STPS3H100AFY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ECOPACK®1

Package/Case:: SOD-128

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:: 760 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1.5 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

STPS3H100AFY FAQ

1.How can I place an order for STPS3H100AFY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS3H100AFY 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 STPS3H100AFY reliable?

The price and inventory of STPS3H100AFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS3H100AFY is usually 5 days.

3.What payment methods are accepted for STPS3H100AFY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS3H100AFY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS3H100AFY?

STPS3H100AFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS3H100AFY 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 STPS3H100AFY?

For technical support, including STPS3H100AFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS3H100AFY requirements.

6.How does Aetrix verify that STPS3H100AFY is sourced from the original manufacturer or authorized distributors?

All STPS3H100AFY 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 STPS3H100AFY meets industry standards.

7.What is the process for return or replacement of STPS3H100AFY?

All STPS3H100AFY units undergo pre-shipment inspection (PSI). If there is an issue with STPS3H100AFY, 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 STPS3H100AFY part is unused and in its original packaging.

Return procedure for STPS3H100AFY:

1.Submit a request within 90 days.

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

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