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STMicroelectronics STPST8H100SFY
- Part No.:
- STPST8H100SFY
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
STPST8H100SFY.pdf
- Description:
- AUTOMOTIVE 100 V, 8 A POWER SCHO
- Quantity:
- Payment:
- Shipping:
Inventory:5,783
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Product details
Overview
STPST8H100SFY from STMicroelectronics is an AEC-Q101-qualified 8 A, 100 V automotive Schottky trench rectifier in PSMC (TO-277A) package, featuring typ. 0.560 V forward voltage at 125 °C and 8 A, 1.4 °C/W junction-to-case thermal resistance, and 100% production avalanche testing - deployed in ECU power supplies and LED lighting DC/DC converters.
For engineers reviewing the STPST8H100SFY datasheet, STPST8H100SFY pinout, STPST8H100SFY application, or STPST8H100SFY equivalent, key selection criteria include VF/IR trade-off at high Tj, avalanche ruggedness under unclamped inductive switching, thermal performance on FR4 with limited copper area, and flat-package mounting compatibility in space-constrained automotive modules.
Technical Context
This device implements ST's proprietary trench Schottky architecture to minimize conduction loss while maintaining low reverse leakage - achieving 0.560 V VF at 125 °C/8 A and only 4.6 mA IR at 125 °C/70 V. Its 1.4 °C/W Rth(j-c) enables high-power operation without external heatsink when mounted on ≥4 cm² copper.
The PSMC (TO-277A) package integrates dual-anode terminals shorted internally, supports conduction-cooled mounting, and meets ECOPACK2 environmental compliance. It is rated for continuous operation from –40 °C to +175 °C junction temperature with 12 A single-pulse avalanche current capability (L = 300 µH, VDD = 15 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - blocks up to 100 V reverse voltage in flyback snubber or OR-ing paths without breakdown |
| IF(AV) | 8 A at Tc = 155 °C - delivers sustained DC output current in compact DC/DC converters |
| VF (typ.) | 0.560 V at Tj = 125 °C, IF = 8 A - reduces conduction loss to ~4.5 W vs. 6–8 W for legacy Schottkys |
| Rth(j-c) | 1.4 °C/W - allows 10.7 W power dissipation before reaching 175 °C junction limit at 25 °C case |
| IAS | 12 A - withstands unclamped inductive energy events (EAS = 0.5 × 300 µH × 12² A² ≈ 21.6 mJ) |
| Tj (max) | +175 °C - supports placement near hot engine-control components without derating |
| IR (max) | 4.6 mA at 125 °C/70 V - limits reverse leakage in high-side freewheeling configurations |
Pinout & Package
PSMC (TO-277A) is a flat, surface-mount, dual-anode single-cathode package with exposed thermal pad. Mounting requires soldering the cathode tab to a minimum 4 cm² copper area on FR4 for thermal compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 / Anode 2 | Parallel input terminals | Internally shorted anodes reduce series resistance and improve current sharing uniformity |
| Cathode (Tab) | Output terminal & thermal path | Exposed metal tab serves as both current return and primary heat conduction interface to PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| 100% avalanche tested | Every unit passes production-level unclamped inductive switching test per Figure 1–2 |
| Low VF/IR trade-off | 0.560 V @ 125 °C/8 A and only 4.6 mA IR @ 125 °C/70 V - optimized for high-efficiency SMPS |
| Flat PSMC package | Height ≤1.2 mm - enables integration into ultra-low-profile automotive modules (e.g., headlamp drivers) |
| ECOPACK2 compliance | Halogen-free, RoHS-compliant materials with lead-free termination finish |
Applications
| Automotive LED Headlamp Power Supply | Flyback DC/DC Converter in ECU |
|---|---|
Use Scenario: High-brightness LED array powered by 12 V battery via isolated flyback converter operating at 250 kHz. IC Role / Device Role / Timing Role: Output rectifier handling 8 A average forward current with minimal conduction loss and thermal rise. Use Value: 0.560 V VF at 125 °C cuts diode loss by ~35% vs. standard Schottky, enabling smaller heatsink and higher lumen density. | Use Scenario: 5 V/3 A auxiliary supply for microcontroller, CAN transceiver, and sensors inside engine control unit. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement - freewheeling path during MOSFET off-time. Use Value: 1.4 °C/W Rth(j-c) allows direct PCB copper cooling, eliminating discrete heatsink and reducing BOM count. |
| On-board Battery-to-48 V DC/DC | Reverse Polarity Protection in ADAS Camera Module |
Use Scenario: Bidirectional buck-boost stage converting 12 V battery to 48 V rail for active suspension actuators. IC Role / Device Role / Timing Role: Freewheeling diode in high-frequency (300–500 kHz), high-current (8 A avg) power stage. Use Value: Low recovery charge minimizes switching loss during hard-commutation transitions, improving efficiency above 92%. | Use Scenario: Input protection for 12 V camera module powered from vehicle harness with risk of reversed connector insertion. IC Role / Device Role / Timing Role: OR-ing diode placed between input connector and internal LDO/regulator. Use Value: 100% avalanche-tested ruggedness ensures survival during 12 V reverse-battery transients up to 200 A surge. |
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 | 10 A/100 V, VF = 0.65 V @ 125 °C/10 A, Rth(j-c) = 1.8 °C/W, no avalanche rating | Lacks AEC-Q101 and production avalanche test; suitable for industrial but not safety-critical automotive | Select only if Tj stays below 150 °C and transient immunity is not required |
| Vishay VS-8EWH10FN-M3 | 8 A/100 V, VF = 0.69 V @ 25 °C/8 A, Tj max = +150 °C, TO-220AC package (height > 9 mm) | Higher VF increases conduction loss; larger TO-220AC incompatible with low-profile automotive layouts | Acceptable only where board height > 10 mm and thermal margin permits higher VF |
Compared with NSS10100CTG and VS-8EWH10FN-M3, STPST8H100SFY uniquely combines AEC-Q101 qualification, 175 °C operation, 100% avalanche screening, and sub-1.2 mm profile - making it the only choice for thermally dense, safety-critical automotive power stages.
Availability
STPST8H100SFY is available at Aetrix Electronics and suitable for automotive LED lighting, ECU power supply, and on-board DC/DC converter designs requiring stable component supply across extended temperature and long product lifecycles.
Supply support for STPST8H100SFY 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, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
This device belongs to ST's automotive-grade power Schottky rectifier family, engineered specifically for high-frequency, high-reliability DC/DC conversion in engine compartments and ADAS subsystems.
FAQ
What is the maximum allowable case temperature for continuous 8 A operation?
The datasheet specifies IF(AV) = 8 A at Tc = 155 °C with δ = 0.5 square wave. At this case temperature and duty cycle, junction temperature remains within the –40 °C to +175 °C limit assuming Rth(j-c) = 1.4 °C/W and no additional ambient thermal resistance. Derating is required above 155 °C case temperature.
Is STPST8H100SFY pin-compatible with other PSMC-packaged rectifiers?
Yes - STPST8H100SFY uses the standardized PSMC (TO-277A) footprint defined in DS14188 Figure 10, matching mechanical dimensions and terminal layout of all ST PSMC Schottky rectifiers (e.g., STPST5H100-Y, STPST12H100-Y), enabling drop-in replacement within same current/voltage class.
Does this device require a heatsink for 8 A operation?
No external heatsink is required if mounted on ≥4 cm² of 70 µm-thick copper on FR4 PCB, per Figure 8. With that copper area, Rth(j-a) drops to ~6.5 °C/W, allowing 8 A operation at 25 °C ambient without exceeding 175 °C junction temperature - verified by thermal simulation and application note AN5088.
How does the 100% avalanche test differ from standard UIS testing?
Each STPST8H100SFY undergoes production-level unclamped inductive switching (UIS) per Figure 1–2: 12 A pulse into 300 µH inductance with VDD = 15 V and VCL_DUT clamped to 100 V. This validates single-pulse ruggedness to 21.6 mJ, exceeding AEC-Q101 UIS requirements and ensuring robustness against real-world inductive turn-off transients.
STPST8H100SFY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-277, 3-PowerDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 695 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 17 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
- Operating Temperature - Junction:
- -40°C ~ 175°C
STPST8H100SFY FAQ
1.How can I place an order for STPST8H100SFY through Aetrix?
Please submit a Request for Quotation (RFQ) for STPST8H100SFY 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 STPST8H100SFY reliable?
The price and inventory of STPST8H100SFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST8H100SFY is usually 5 days.
3.What payment methods are accepted for STPST8H100SFY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST8H100SFY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPST8H100SFY?
STPST8H100SFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPST8H100SFY 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 STPST8H100SFY?
For technical support, including STPST8H100SFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST8H100SFY requirements.
6.How does Aetrix verify that STPST8H100SFY is sourced from the original manufacturer or authorized distributors?
All STPST8H100SFY 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 STPST8H100SFY meets industry standards.
7.What is the process for return or replacement of STPST8H100SFY?
All STPST8H100SFY units undergo pre-shipment inspection (PSI). If there is an issue with STPST8H100SFY, 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 STPST8H100SFY part is unused and in its original packaging.
Return procedure for STPST8H100SFY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPST8H100SFY Tags
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1N4448X-TP
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1N4148WX-TP
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BAV21W-7-F
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