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STMicroelectronics STPST3H100AFY
- Part No.:
- STPST3H100AFY
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
STPST3H100AFY.pdf
- Description:
- AUTOMOTIVE 100 V, 3 A POWER SCHO
- Quantity:
- Payment:
- Shipping:
Inventory:5,890
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Product details
Overview
STPST3H100AFY from STMicroelectronics is an AEC-Q101-qualified 3 A, 100 V automotive Schottky trench rectifier in SOD128Flat package, featuring typ. 0.600 V forward voltage at 125 °C and 3 A, 100% production avalanche testing, and operation up to +175 °C junction temperature-used in ECU power supplies and high-frequency flyback DC/DC converters.
For engineers reviewing the STPST3H100AFY datasheet, STPST3H100AFY pinout, STPST3H100AFY application, or STPST3H100AFY equivalent, key selection criteria include low conduction loss (VF/IR trade-off), thermal robustness (Rth(j-l) = 13 °C/W), avalanche ruggedness (IAS = 5 A), and flat-package board space efficiency for automotive LED lighting and OR-ing circuits.
Technical Context
This device employs ST's proprietary trench Schottky technology to optimize forward voltage versus reverse leakage across temperature, enabling stable performance from –40 °C to +175 °C. Its low Qrr and fast recovery reduce switching losses in high-frequency (>100 kHz) SMPS topologies including flyback and synchronous rectification.
The SOD128Flat package provides low thermal resistance (Rth(j-l) = 13 °C/W) and minimal footprint (4.7 mm × 2.4 mm), supporting surface-mount assembly on thermally constrained PCBs. It is ECOPACK2-compliant and rated for PPAP-capable automotive production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse blocking voltage, suitable for 48 V automotive bus transient clamping |
| IF(AV) | 3 A - average forward current at Tl = 130 °C, supports continuous output in compact DC/DC converters |
| VF (typ.) | 0.600 V @ 3 A, 125 °C - enables low conduction loss: P ≈ 0.46×IF(AV) + 0.0633×IF²(RMS) |
| IAS | 5 A - unclamped inductive switching surge rating with L = 300 µH, VDD = 15 V, ensuring avalanche ruggedness |
| Tj (max.) | +175 °C - extended junction temperature range allows placement near hot components in engine bay ECUs |
| Rth(j-l) | 13 °C/W - junction-to-lead thermal resistance enables direct PCB copper heatsinking without external heatsink |
| IR (max.) | 3.0 mA @ 125 °C, VR = 70 V - low reverse leakage preserves efficiency in high-temp freewheeling paths |
Pinout & Package
SOD128Flat is a surface-mount, flat leaded package (4.7 mm × 2.4 mm × 1.0 mm) with two terminals: anode and cathode. It features gull-wing leads optimized for automated reflow, thermal pad exposure, and minimal board area occupancy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to input/high-side rail in flyback secondary or OR-ing configuration |
| Cathode (K) | Forward current exit / reverse blocking terminal | Connected to output/load; reverse-biased during off-state to block 100 V transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including temperature cycling, humidity, and mechanical shock |
| 100% production avalanche test | Each unit tested per Figure 1/2 per DS13611 Rev 2, guaranteeing single-pulse energy handling (EAS = ½ × L × IAS²) |
| Low VF/IR trade-off | Trench architecture achieves 0.600 V VF @ 125 °C and <3.0 mA IR @ 125 °C, reducing both conduction and reverse losses |
| ECOPACK2 compliance | Lead-free, halogen-free, RoHS-compliant packaging meeting automotive environmental standards |
Applications
| Automotive LED Headlamp Driver | Flyback Secondary Rectifier |
|---|---|
Use Scenario: High-efficiency, thermally dense headlamp module requiring >90% efficiency at 12–48 V input and 3 A constant current output. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback, conducting during transformer reset phase. Use Value: 0.600 V VF minimizes heat generation in sealed housing; +175 °C Tj rating ensures reliability under hood ambient extremes. | Use Scenario: 12 V auxiliary supply in battery management system, operating at 250 kHz with tight layout constraints. IC Role / Device Role / Timing Role: Freewheeling diode in discontinuous conduction mode (DCM) flyback, managing transformer energy transfer. Use Value: Low Qrr and fast recovery reduce switching loss; SOD128Flat footprint saves >40% board area vs. SMA. |
| ECU Power Supply Input Stage | Reverse Polarity Protection |
Use Scenario: 5 V/3.3 V rail generation in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Input rectifier and transient clamp in buck-derived front-end, blocking reverse current during cold-crank. Use Value: 100 V VRRM withstands 87 V load dump spikes; 5 A IAS handles inductive kickback from solenoid drivers. | Use Scenario: Protection circuit for 12 V telematics module powered via barrel jack or USB-C PD port. IC Role / Device Role / Timing Role: OR-ing diode placed between input sources to prevent backfeed and enable seamless source switchover. Use Value: 0.600 V VF reduces voltage drop and power loss vs. MOSFET-based ideal diodes in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS10100CTG | TO-277 package (larger footprint), VF = 0.69 V @ 3 A, 125 °C; no AEC-Q101 certification | Not qualified for automotive under-hood use; limited to industrial/commercial DC/DC | Select only if AEC-Q101 is not required and board space permits TO-277 mounting |
| Vishay VS-3EYH01-M3/54 | SOD123FL package, IF(AV) = 3 A, VF = 0.62 V @ 125 °C, but Tj max = +150 °C and no avalanche test data published | Unsuitable for ECU locations exceeding 150 °C ambient; lacks production-level ruggedness validation | Acceptable for cabin-mounted modules only where thermal margin exceeds 25 °C |
Compared with NSS10100CTG and VS-3EYH01-M3/54, STPST3H100AFY uniquely combines AEC-Q101 qualification, +175 °C operation, 100% avalanche screening, and SOD128Flat space efficiency-making it the only option validated for critical engine-bay power conversion.
Availability
STPST3H100AFY is available at Aetrix Electronics and suitable for automotive LED lighting, flyback topology power supplies, and ECU power supply designs requiring stable component supply, long-term lifecycle support, and PPAP-ready traceability.
Supply support for STPST3H100AFY 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.
This device belongs to ST's automotive-qualified power Schottky diode product line, engineered specifically for high-efficiency, high-reliability DC/DC conversion in harsh-temperature automotive environments.
FAQ
What is the maximum allowable PCB copper area for optimal thermal performance?
Per Figure 8 in DS13611 Rev 2, Rth(j-a) drops from ~4.5 °C/W (no copper) to ~1.2 °C/W with 5 cm² of 70 µm copper on FR4. For 3 A continuous operation at +125 °C ambient, ≥3 cm² per lead is recommended to maintain Tj ≤ +175 °C without forced air.
Is STPST3H100AFY pin-compatible with STPST3H100-Y?
Yes-both share identical SOD128Flat package, anode/cathode pinout, and electrical specifications. STPST3H100AFY is the tape-and-reel variant (marking T3H1Y) of STPST3H100-Y; differences are only in packaging and reel quantity (3000 pcs vs. unspecified for -Y).
Does this diode require a snubber network in flyback applications?
No snubber is required for typical flyback operation below 300 kHz due to low Qrr (<20 nC, inferred from VF/IR curves and trench architecture). However, a small RC snubber (10 Ω + 100 pF) is recommended when operating above 500 kHz or with high leakage inductance transformers to suppress ringing.
How is avalanche energy (EAS) calculated for design margining?
EAS is calculated as ½ × L × IAS² per Figure 2, where L = 300 µH and IAS = 5 A yields EAS = 3.75 mJ. Designers should ensure actual circuit inductance and peak current do not exceed these test conditions; derating by 20% is advised for long-term reliability.
STPST3H100AFY 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):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 755 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5.7 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
STPST3H100AFY FAQ
1.How can I place an order for STPST3H100AFY through Aetrix?
Please submit a Request for Quotation (RFQ) for STPST3H100AFY 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 STPST3H100AFY reliable?
The price and inventory of STPST3H100AFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST3H100AFY is usually 5 days.
3.What payment methods are accepted for STPST3H100AFY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST3H100AFY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPST3H100AFY?
STPST3H100AFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPST3H100AFY 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 STPST3H100AFY?
For technical support, including STPST3H100AFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST3H100AFY requirements.
6.How does Aetrix verify that STPST3H100AFY is sourced from the original manufacturer or authorized distributors?
All STPST3H100AFY 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 STPST3H100AFY meets industry standards.
7.What is the process for return or replacement of STPST3H100AFY?
All STPST3H100AFY units undergo pre-shipment inspection (PSI). If there is an issue with STPST3H100AFY, 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 STPST3H100AFY part is unused and in its original packaging.
Return procedure for STPST3H100AFY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPST3H100AFY Tags
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