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

STMicroelectronics STPS2H100AY

Name: STPS2H100AY
Brand: STMicroelectronics
SKU: STPS2H100AY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS2H100AY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: STPS2H100AY.pdf

Description:: DIODE SCHOTTKY 100V 2A SMA

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Inventory:121,637

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Product details

Overview

STPS2H100AY from STMicroelectronics is an AEC-Q101-qualified automotive Schottky barrier rectifier with 100 V repetitive peak reverse voltage (V_RRM), 2 A average forward current (I_F(AV)), and 0.60 V typical forward voltage drop at 125 °C - designed for freewheeling, reverse battery protection, and DC/DC converter output stages in high-temperature automotive environments.

For engineers reviewing the STPS2H100AY datasheet, STPS2H100AY pinout, STPS2H100AY application, or STPS2H100AY equivalent, key selection criteria include junction temperature rating up to 175 °C, low leakage current (<1 µA at 25 °C), avalanche capability (173 W at 10 µs), thermal resistance (R_th(j-l) = 30 °C/W in SMA), and ECOPACK2 compliance for automotive-grade reliability.

Technical Context

This Schottky diode operates as a unidirectional power rectifier with zero recovery time and minimal switching losses - critical for high-frequency SMPS topologies like synchronous buck converters and auxiliary supplies. Its low V_F and high T_j(max) enable efficient conduction at elevated ambient temperatures without thermal runaway under defined heatsinking conditions.

The device supports surge non-repetitive forward current up to 75 A (SMA/SMB) and specified avalanche energy handling, enabling robustness against inductive load transients and reverse polarity events. Package-specific thermal resistances (e.g., R_th(j-l) = 16 °C/W for SOD128Flat) directly impact maximum sustainable I_F(AV) in constrained PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Withstands repetitive reverse voltage up to 100 V across full -40°C to +175°C junction range, enabling use in 48 V automotive systems with margin.
I_F(AV)	2 A - Average forward current rating at T_L = 135 °C (SMA), defining continuous DC output capability in compact power stages.
V_F (typ.)	0.60 V at I_F = 2 A, T_j = 125 °C - Low conduction loss reduces power dissipation and improves efficiency in high-duty-cycle applications.
T_j(max)	175 °C - Maximum operating junction temperature allows reliable operation in engine bay or under-hood environments without derating.
I_R (max)	1 mA at T_j = 125 °C, V_R = V_RRM - Low leakage preserves system standby power budget and prevents unintended discharge paths.
P_ARM	173 W at t_p = 10 µs, T_j = 125 °C - Avalanche-rated energy handling enables survivability during load dump or inductive kick events.
R_th(j-l)	30 °C/W (SMA) - Junction-to-lead thermal resistance determines required copper area and heatsink interface for thermal management.

Pinout & Package

STPS2H100AY is packaged in the SMA (DO-214AC) surface-mount package - a compact, flat, lead-free outline with UL94 V0 epoxy and optimized thermal conduction path via leads.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to switched node (e.g., buck converter switch node) to conduct current during freewheeling phase.
Cathode (K)	Forward current exit point	Connected to output rail or ground return; polarity defines reverse-battery protection direction and rectification orientation.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use including temperature cycling, humidity, and mechanical shock per stress test requirements.
V_RRM guaranteed over full T_j range	100 V reverse blocking maintained from -40°C to +175°C - eliminates need for voltage derating in thermal design.
Low V_F with tight distribution	0.60 V typ. at 2 A / 125°C (±0.05 V max variation) - ensures predictable conduction loss and thermal profile across production lots.
ECOPACK2 compliance	Lead-free, halogen-free, RoHS-compliant packaging meeting automotive environmental standards and end-of-life recycling requirements.
Avalanche energy rating	173 W single-pulse (10 µs) at 125°C junction - provides validated transient robustness for inductive load switching without external snubbers.

Applications

DC/DC Converter Output Stage

Auxiliary Power Supply

Use Scenario: High-frequency synchronous buck converter in ADAS ECU supplying 3.3 V/5 V rails from 12 V battery.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time; enables continuous inductor current and minimizes voltage overshoot.

Use Value: 0.60 V V_F at 125°C reduces conduction loss by ~35% vs. standard silicon diodes, lowering thermal load on densely packed PCB.

Use Scenario: Isolated flyback auxiliary supply powering microcontroller, CAN transceiver, and sensor bias in body control module.

IC Role / Device Role / Timing Role: Secondary-side rectifier converting high-frequency transformer output to regulated DC; operates continuously at 50–100 kHz.

Use Value: 175°C T_j(max) permits placement near heat-generating components without derating, simplifying layout and thermal isolation.

Reverse Battery Polarity Protection

Freewheeling Function in Motor Drivers

Use Scenario: Input protection circuit for infotainment head unit exposed to potential battery connection reversal during service.

IC Role / Device Role / Timing Role: Series-connected Schottky placed between battery input and main DC/DC input; blocks reverse current while passing forward current with minimal drop.

Use Value: 100 V V_RRM accommodates load dump transients up to ±120 V, and low V_F avoids significant voltage loss in normal operation.

Use Scenario: H-bridge motor driver for HVAC blower fan where inductive back-EMF must be safely clamped during PWM turn-off.

IC Role / Device Role / Timing Role: External freewheeling diode across motor winding; conducts stored inductive energy during switch dead-time.

Use Value: Avalanche rating of 173 W ensures survival during repeated 10 µs inductive spikes without degradation, eliminating need for TVS clamping.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS2L100Y	Lower I_F(AV) = 1.7 A; same V_RRM, package, and T_j(max); higher V_F (0.65 V typ. at 125°C).	Suitable only for <1.7 A continuous loads; less margin for peak surges and thermal rise.	Select when cost sensitivity outweighs current margin and thermal headroom requirements.
SB2100-E3/52T	Same 100 V / 2 A rating but SMB package; R_th(j-l) = 25 °C/W; no AEC-Q101 qualification or avalanche rating.	Not qualified for automotive; limited to industrial or consumer power supplies with lower reliability demands.	Choose only for non-automotive designs where PPAP support and transient robustness are not required.

Compared with STPS2H100AY, STPS2L100Y trades current capacity and forward voltage for cost, while SB2100-E3/52T sacrifices automotive qualification and avalanche capability for SMB footprint compatibility - neither offers identical combination of AEC-Q101, 175°C operation, and 173 W avalanche rating.

Availability

STPS2H100AY is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and freewheeling applications requiring stable component supply with full AEC-Q101 traceability and PPAP documentation support.

Supply support for STPS2H100AY 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, specializing in automotive, industrial, and power management ICs and discrete devices with vertical manufacturing capabilities.

STPS2H100AY 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

Is STPS2H100AY suitable for 48 V mild-hybrid automotive systems?

Yes - its 100 V V_RRM provides sufficient margin above nominal 48 V bus (including ISO 16750-2 load dump peaks up to 65 V), and AEC-Q101 qualification ensures reliability under vibration, thermal cycling, and extended temperature operation required in mild-hybrid architectures.

What is the recommended PCB copper area for thermal management in SMA package?

For sustained 2 A operation at 135 °C lead temperature, ST recommends ≥2.6 cm² of 70 µm copper per lead (per Figure 9), with thermal vias connecting top-layer pads to internal/ground planes to achieve effective R_th(j-a) ≤ 40 °C/W in typical FR4 boards.

Does STPS2H100AY require a heatsink for 2 A continuous operation?

No external heatsink is required if PCB copper area meets ST's recommended footprint and thermal via guidelines; the SMA package's R_th(j-l) = 30 °C/W enables direct conduction cooling through leads into copper pours, provided ambient temperature remains ≤85 °C and airflow is minimal.

How does the avalanche rating translate to real-world fault tolerance?

The 173 W (10 µs) avalanche rating corresponds to a single 125 °C junction event delivering ~1.73 mJ - sufficient to absorb typical inductive kick energy from 100 µH/2 A motor windings or relay coils without failure, verified per JEDEC JESD22-A110.

STPS2H100AY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: Q

Package/Case:: DO-214AC, SMA

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:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

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

STPS2H100AY FAQ

1.How can I place an order for STPS2H100AY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS2H100AY 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 STPS2H100AY reliable?

The price and inventory of STPS2H100AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2H100AY is usually 5 days.

3.What payment methods are accepted for STPS2H100AY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2H100AY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS2H100AY?

STPS2H100AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS2H100AY 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 STPS2H100AY?

For technical support, including STPS2H100AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2H100AY requirements.

6.How does Aetrix verify that STPS2H100AY is sourced from the original manufacturer or authorized distributors?

All STPS2H100AY 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 STPS2H100AY meets industry standards.

7.What is the process for return or replacement of STPS2H100AY?

All STPS2H100AY units undergo pre-shipment inspection (PSI). If there is an issue with STPS2H100AY, 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 STPS2H100AY part is unused and in its original packaging.

Return procedure for STPS2H100AY:

1.Submit a request within 90 days.

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

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