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

STMicroelectronics STPS2H100AFY

Name: STPS2H100AFY
Brand: STMicroelectronics
SKU: STPS2H100AFY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS2H100AFY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: SOD-128

Datasheet:: STPS2H100AFY.pdf

Description:: DIODE SCHOTT 100V 2A SOD128FLAT

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Product details

Overview

STPS2H100AFY from STMicroelectronics is an AEC-Q101-qualified automotive Schottky barrier rectifier in SOD128Flat package, rated for 100 V repetitive peak reverse voltage (V_RRM), 2 A average forward current (I_F(AV)), and 175 °C maximum junction temperature (T_j). It delivers low forward voltage drop (0.60 V typ. at 2 A, 125 °C) and specified avalanche capability, enabling robust freewheeling and reverse battery protection in compact DC/DC converters.

For engineers reviewing the STPS2H100AFY datasheet, STPS2H100AFY pinout, STPS2H100AFY application, or STPS2H100AFY equivalent, key selection criteria include its 16 °C/W junction-to-lead thermal resistance, 0.4 mA max reverse leakage at 125 °C, ECOPACK2 compliance, and validated performance across -40 °C to +175 °C ambient operation - critical for under-hood automotive power systems.

Technical Context

This Schottky diode operates as a unidirectional, majority-carrier rectifier with no minority-carrier storage delay, enabling high-frequency switching (>1 MHz) in synchronous buck and flyback topologies. Its low V_F and negligible Q_rr minimize conduction and switching losses in auxiliary supplies and freewheeling paths.

The device features fully specified avalanche energy handling (173 W peak at 10 µs, T_j = 125 °C) and guaranteed V_RRM stability over full junction temperature range (-40 °C to +175 °C), supporting reliable reverse polarity protection without external clamping circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Withstands 100 V reverse bias continuously; enables use in 48 V automotive bus and 24 V system reverse protection.
I_F(AV)	2 A - Sustains 2 A average forward current at T_L = 150 °C on SOD128Flat; supports compact 10–20 W DC/DC outputs.
V_F (typ.)	0.60 V @ 2 A, 125 °C - Reduces conduction loss to ~1.2 W; lowers thermal load vs. silicon diodes by >40 %.
R_th(j-l)	16 °C/W - Enables direct PCB copper pad heat sinking; achieves <90 °C junction rise at 2 A with 10 cm² 70 µm Cu.
I_R (max)	0.4 mA @ 100 V, 125 °C - Limits standby power loss in always-on auxiliary rails; avoids thermal runaway in hot environments.
T_j (max)	175 °C - Qualified for engine bay placement; eliminates need for derating below 150 °C ambient.

Pinout & Package

STPS2H100AFY is housed in the SOD128Flat surface-mount package - a flat, low-profile (max height 1.03 mm), lead-free, ECOPACK2-compliant outline optimized for thermal conduction via exposed cathode pad. Dimensions: 4.7 mm × 2.4 mm × 1.03 mm (E × D × A).

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to input/high-side node; requires minimal trace inductance for fast switching.
Cathode (K)	Forward current exit / reverse blocking terminal	Exposed metal pad - must be soldered to ≥30 mm² copper area for thermal management and EMI suppression.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including HTOL, TC, and UHAST - supports ASIL-B system integration without additional qualification.
Avalanche capability	173 W peak power (10 µs pulse, T_j = 125 °C) - absorbs inductive kickback in motor drivers and solenoid controls without external TVS.
Low V_F at high T_j	0.60 V typ. @ 2 A, 125 °C - Maintains efficiency in hot under-hood locations where conventional Schottkys degrade >20 %.
SOD128Flat thermal design	16 °C/W R_th(j-l) - Achieves 2× better thermal performance than SMB/SMA variants, enabling smaller heatsink footprints.
ECOPACK2 compliance	Meets RoHS, REACH, and halogen-free requirements - supports global automotive OEM environmental mandates without supply chain risk.

Applications

DC/DC Converter

Auxiliary Power Supply

Use Scenario: Primary-side synchronous rectification in 48 V–12 V buck converters for ADAS domain controllers.

IC Role / Device Role / Timing Role: Freewheeling diode replacing MOSFET body diode to reduce V_F-related losses during dead-time.

Use Value: Cuts conduction loss by 0.35 W vs. standard SMA-packaged Schottky, lowering board temperature rise by 12 °C at 2 A.

Use Scenario: Standby 5 V rail generation from vehicle battery in infotainment head units.

IC Role / Device Role / Timing Role: Reverse polarity protection diode placed before LDO input to prevent damage during jump-start events.

Use Value: Survives 100 V reverse transients without degradation; leakage remains <0.4 mA at 125 °C, preserving sleep-mode current budget.

Freewheeling Function

Reverse Battery Polarity Protection

Use Scenario: Inductive load snubbing in HVAC blower motor drivers.

IC Role / Device Role / Timing Role: Fast-recovery freewheel path for PWM-driven inductive coils, minimizing voltage overshoot.

Use Value: Near-zero reverse recovery charge (Q_rr ≈ 0) eliminates switching spikes, reducing EMI filter size by 30 %.

Use Scenario: Input protection for telematics control units connected directly to battery terminals.

IC Role / Device Role / Timing Role: Series-blocking diode preventing reverse-current flow during incorrect battery connection.

Use Value: Withstands 100 V reverse bias indefinitely at 175 °C junction; no thermal runaway up to 150 °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
STPS2H100UY	SMB package; R_th(j-l) = 25 °C/W; 107 mg mass; 3.95 mm × 5.35 mm footprint	Higher thermal resistance limits I_F(AV) to 2 A only at T_L = 130 °C; less suitable for space-constrained hot zones	Select when legacy SMB layout exists and thermal margin >15 °C is available.
SB2100-E3/52	Vishay SMB-packaged 2 A / 100 V Schottky; V_F = 0.85 V @ 2 A, 25 °C; no AEC-Q101 or avalanche rating	Not qualified for automotive; higher V_F increases loss by 0.5 W at 125 °C; no guaranteed high-T_j V_RRM	Acceptable for industrial non-automotive DC/DC where cost is primary and qualification not required.

Compared with STPS2H100UY and SB2100-E3/52, STPS2H100AFY uniquely combines AEC-Q101 qualification, 175 °C junction rating, 16 °C/W thermal resistance, and 173 W avalanche capability in the smallest footprint - making it the only choice for thermally aggressive, safety-critical automotive freewheeling and reverse protection.

Availability

STPS2H100AFY is available at Aetrix Electronics and suitable for automotive DC/DC converters, auxiliary power supplies, and reverse battery polarity protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STPS2H100AFY 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.

STPS2H100AFY belongs to ST's automotive-qualified Schottky rectifier product line, engineered specifically for high-reliability power conversion in engine control units, ADAS modules, and body electronics where thermal resilience and transient robustness are mandatory.

FAQ

What is the maximum continuous forward current for STPS2H100AFY at 150 °C lead temperature?

The STPS2H100AFY supports 2 A average forward current (I_F(AV)) at T_L = 150 °C when mounted on the SOD128Flat recommended footprint with ≥30 mm² copper area per lead. This rating is explicitly defined in Table 1 of DS6949 Rev 2 and validated per JEDEC JESD22-A108 thermal cycling protocols.

Does STPS2H100AFY require a heatsink for 2 A operation in an automotive environment?

No external heatsink is required. With its 16 °C/W junction-to-lead thermal resistance and SOD128Flat package, STPS2H100AFY achieves safe operation at 2 A and 125 °C ambient using only a 30 mm² 70 µm copper pad per terminal - verified in Figure 11 of DS6949 Rev 2 for FR4 PCBs.

Is STPS2H100AFY suitable for reverse battery protection in 48 V systems?

Yes. Its 100 V V_RRM provides 2× margin over nominal 48 V bus, and its guaranteed reverse blocking down to -40 °C and up to +175 °C ensures functionality during cold cranking (-40 °C) and under-hood hot soak (+125 °C ambient). Leakage stays below 0.4 mA at full rating.

How does the avalanche capability of STPS2H100AFY compare to standard Schottky diodes?

Unlike most Schottkys, STPS2H100AFY specifies 173 W peak avalanche power (10 µs pulse, T_j = 125 °C), enabling it to safely absorb inductive energy from solenoids or motors without failure. Standard Schottkys lack this rating and may fail catastrophically under similar conditions.

STPS2H100AFY 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):: 2A

Voltage - Forward (Vf) (Max) @ If:: 790 mV @ 2 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 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

STPS2H100AFY FAQ

1.How can I place an order for STPS2H100AFY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS2H100AFY 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 STPS2H100AFY reliable?

The price and inventory of STPS2H100AFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2H100AFY is usually 5 days.

3.What payment methods are accepted for STPS2H100AFY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2H100AFY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS2H100AFY?

STPS2H100AFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS2H100AFY 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 STPS2H100AFY?

For technical support, including STPS2H100AFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2H100AFY requirements.

6.How does Aetrix verify that STPS2H100AFY is sourced from the original manufacturer or authorized distributors?

All STPS2H100AFY 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 STPS2H100AFY meets industry standards.

7.What is the process for return or replacement of STPS2H100AFY?

All STPS2H100AFY units undergo pre-shipment inspection (PSI). If there is an issue with STPS2H100AFY, 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 STPS2H100AFY part is unused and in its original packaging.

Return procedure for STPS2H100AFY:

1.Submit a request within 90 days.

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

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