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STMicroelectronics STPST1H100ZFY
- Part No.:
- STPST1H100ZFY
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
STPST1H100ZFY.pdf
- Description:
- AUTOMOTIVE 100 V, 1 A POWER SCHO
- Quantity:
- Payment:
- Shipping:
Inventory:9,453
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Product details
Overview
STPST1H100ZFY from STMicroelectronics is an AEC-Q101-qualified 1 A, 100 V automotive Schottky trench rectifier in SOD123Flat package, featuring 0.58 V typical forward voltage at 125 °C and 100% production avalanche testing. It delivers low conduction, reverse, and switching losses for high-frequency DC/DC converters in engine control units and LED lighting systems.
For engineers reviewing the STPST1H100ZFY datasheet, STPST1H100ZFY pinout, STPST1H100ZFY application, or STPST1H100ZFY equivalent, key selection criteria include VF/IR trade-off at 125 °C, Tj max of +175 °C, SOD123Flat thermal resistance (Rth(j-l) = 16 °C/W), and ECOPACK2 compliance for automotive power supply designs.
Technical Context
This device employs ST's proprietary trench Schottky technology to optimize forward voltage versus reverse leakage across temperature, enabling stable operation from –40 °C to +175 °C junction. Its flat, space-saving SOD123Flat package supports high-density PCB layouts in constrained automotive modules.
The rectifier is characterized for freewheeling, OR-ing, and reverse polarity protection roles, with validated unclamped inductive switching performance (IAS = 2 A, L = 300 µH, VDD = 15 V) and low recovery charge to minimize switching loss in flyback topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; enables use in 48 V automotive bus-derived DC/DC stages. |
| IF(AV) | 1 A - Average forward current at TL = 155 °C; defines continuous output capability in ECU auxiliary supplies. |
| VF (typ.) | 0.58 V @ Tj = 125 °C, IF = 1 A - Low conduction loss reduces thermal stress in thermally limited LED driver PCBs. |
| IR (max) | 0.48 mA @ Tj = 125 °C, VR = 70 V - Controlled leakage preserves efficiency in high-temperature under-hood environments. |
| Rth(j-l) | 16 °C/W - Junction-to-lead thermal resistance; determines heatsink-free power handling up to ~1.2 W at TL = 155 °C. |
| Tj (max) | +175 °C - Maximum operating junction temperature; supports placement near hot engine components without derating. |
| IAS | 2 A - Single-pulse avalanche current; ensures robustness against inductive transients in flyback snubber circuits. |
Pinout & Package
SOD123Flat is a surface-mount, two-terminal, lead-free flat package with exposed cathode and anode pads. Dimensions: 2.60 mm × 1.60 mm × 0.98 mm (L × W × H), 12.5 mg weight, ECOPACK2-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to input rail or switch node; must be routed with low-inductance trace for high-frequency flyback operation. |
| Cathode (K) | Forward current exit / reverse-blocking terminal | Connected to output capacitor or load; serves as reference for reverse polarity protection and OR-ing functions. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power applications including engine bay and cabin modules per stress test requirements. |
| Low VF/IR trade-off | 0.58 V VF and 0.48 mA IR at 125 °C - Enables higher efficiency than planar Schottkys in same voltage class. |
| 100% avalanche tested | Every unit undergoes unclamped inductive switching test (EAS = ½ × L × IAS²) - guarantees ruggedness in real-world transients. |
| Flat, space-saving package | SOD123Flat footprint (2.6 × 1.6 mm) - fits tight layouts in compact ECU and LED headlamp drivers. |
Applications
| Automotive LED Headlamp Driver | Flyback DC/DC Converter |
|---|---|
Use Scenario: High-brightness LED array powered from 12 V battery with PWM dimming and thermal foldback. IC Role / Device Role / Timing Role: Output rectifier in secondary-side synchronous or diode-based flyback stage. Use Value: 0.58 V VF at 125 °C minimizes conduction loss and thermal rise in sealed headlamp housing. | Use Scenario: Isolated 5 V/1 A auxiliary supply for microcontroller and sensors in body control module. IC Role / Device Role / Timing Role: Freewheeling diode during MOSFET off-time in primary-switched flyback topology. Use Value: Low recovery charge and 2 A IAS rating suppress voltage spikes and improve reliability under load transients. |
| ECU Power Supply | Reverse Polarity Protection |
Use Scenario: Input-stage rectification for 12 V–5 V buck converter powering engine control unit logic and CAN transceivers. IC Role / Device Role / Timing Role: Input protection and bulk rectification before buck regulator IC. Use Value: +175 °C Tj rating allows direct mounting on ECU PCB near MCU without external heatsink. | Use Scenario: Battery feed protection in telematics unit to prevent damage from accidental reverse connection. IC Role / Device Role / Timing Role: Cathode-connected to load, anode to battery - conducts only during correct polarity. Use Value: 0.48 mA IR at 125 °C ensures minimal standby current drain while maintaining fail-safe blocking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1H100S | SOD-123 package, same VF/IR specs, but not AEC-Q101 qualified; Rth(j-l) = 16 °C/W identical. | Intended for industrial/commercial use only; unsuitable for automotive PPAP or safety-critical modules. | Select when automotive qualification is unnecessary and cost sensitivity outweighs qualification requirements. |
| RB055LAM-40 | TO-220AC package, 1 A/40 V rating, VF = 0.55 V @ 25 °C - lower voltage rating and larger footprint. | Limited to 12 V systems; incompatible with 48 V or 100 V reverse-blocking needs in modern ECU designs. | Choose only for legacy 12 V non-automotive supplies where board space and voltage margin are not constraints. |
Compared with STPS1H100S and RB055LAM-40, STPST1H100ZFY uniquely combines AEC-Q101 qualification, 100 V blocking, SOD123Flat compactness, and +175 °C operation-making it the sole fit for next-generation automotive DC/DC miniaturization.
Availability
STPST1H100ZFY is available at Aetrix Electronics and suitable for automotive LED lighting, flyback DC/DC converters, and ECU power supply designs requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for STPST1H100ZFY 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 analog, microcontrollers, power devices, and sensors for automotive, industrial, and consumer markets.
STPST1H100ZFY belongs to ST's automotive-qualified trench Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in engine control, lighting, and ADAS subsystems.
FAQ
What is the maximum allowable PCB copper area for optimal thermal performance in SOD123Flat?
For STPST1H100ZFY in SOD123Flat, thermal resistance junction-to-ambient drops to ~4.5 °C/W with 5 cm² of 70 µm copper per lead on FR4. Minimum recommended copper area is 1.4 cm² per pad (per Figure 9), achieving Rth(j-a) ≈ 45 °C/W at natural convection - critical for sustained 1 A operation near Tj = 150 °C.
Does STPST1H100ZFY support synchronous rectification?
No - STPST1H100ZFY is a passive Schottky rectifier, not a synchronous MOSFET controller or integrated driver. It operates as a unidirectional freewheeling device; synchronous replacement would require a gate-driven N-channel MOSFET plus timing control circuitry.
Is the 2 A IAS rating tested per unit or statistically sampled?
Per DS14191 Rev 3, Section 1, "100% Avalanche tested in production" means every STPST1H100ZFY unit undergoes the unclamped inductive switching test (EAS = ½ × L × IAS²) with L = 300 µH and VDD = 15 V - no sampling or statistical qualification is used.
How does the SOD123Flat package compare thermally to SOD128Flat for this device?
SOD128Flat offers lower Rth(j-l) = 15 °C/W vs. 16 °C/W for SOD123Flat, but STPST1H100ZFY is specifically marked and qualified only in SOD123Flat (order code ZFY). The SOD128Flat variant is STPST1H100AFY - different marking, weight (26.4 mg), and footprint - not interchangeable without layout redesign.
STPST1H100ZFY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 725 mV @ 1 A
- Speed:
- No Recovery Time > 500mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1.7 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -40°C ~ 175°C
STPST1H100ZFY FAQ
1.How can I place an order for STPST1H100ZFY through Aetrix?
Please submit a Request for Quotation (RFQ) for STPST1H100ZFY 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 STPST1H100ZFY reliable?
The price and inventory of STPST1H100ZFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST1H100ZFY is usually 5 days.
3.What payment methods are accepted for STPST1H100ZFY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST1H100ZFY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPST1H100ZFY?
STPST1H100ZFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPST1H100ZFY 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 STPST1H100ZFY?
For technical support, including STPST1H100ZFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST1H100ZFY requirements.
6.How does Aetrix verify that STPST1H100ZFY is sourced from the original manufacturer or authorized distributors?
All STPST1H100ZFY 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 STPST1H100ZFY meets industry standards.
7.What is the process for return or replacement of STPST1H100ZFY?
All STPST1H100ZFY units undergo pre-shipment inspection (PSI). If there is an issue with STPST1H100ZFY, 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 STPST1H100ZFY part is unused and in its original packaging.
Return procedure for STPST1H100ZFY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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