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STMicroelectronics STPST5H100AF
- Part No.:
- STPST5H100AF
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
STPST5H100AF.pdf
- Description:
- 100 V, 5 A POWER SCHOTTKY TRENCH
- Quantity:
- Payment:
- Shipping:
Inventory:16,720
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Product details
Overview
STPST5H100AF from STMicroelectronics is a 5 A, 100 V Schottky trench rectifier in SOD128Flat package, optimized for high-frequency SMPS with low conduction and switching losses. It delivers typ. 0.55 V forward voltage at 5 A/125 °C, supports 175 °C max junction temperature, and features avalanche ruggedness (IAS = 9 A) for reliable freewheeling in flyback and auxiliary power supplies.
For engineers reviewing the STPST5H100AF datasheet, STPST5H100AF pinout, STPST5H100AF application, or STPST5H100AF equivalent, this device is selected for compact DC/DC converters, LED drivers, and telecom auxiliary supplies where thermal efficiency, space-constrained layout, and robust reverse recovery performance are critical.
Technical Context
This Schottky rectifier uses ST's proprietary trench silicon technology to achieve superior VF/IR trade-off versus planar Schottkys - enabling lower conduction loss without sacrificing leakage. Its flat SOD128Flat package provides low Rth(j-l) of 10 °C/W and supports high-density PCB layouts.
The device is rated for repetitive 100 V reverse voltage and 5 A average forward current at TL = 120 °C, with pulse surge capability up to 75 A (10 ms). Avalanche testing confirms unclamped inductive switching robustness under real-world transient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Withstands peak reverse voltage in flyback snubber and OR-ing circuits without breakdown. |
| IF(AV) | 5 A at TL = 120 °C - Sustains continuous output current in compact 12–24 V auxiliary supplies. |
| VF (typ.) | 0.55 V at 5 A / 125 °C - Reduces conduction loss to ~2.75 W, lowering heatsink requirements. |
| Tj (max) | +175 °C - Enables operation in sealed enclosures or high-ambient environments like smart meters. |
| Rth(j-l) | 10 °C/W - Enables direct thermal coupling to PCB copper, eliminating need for external heatsinks in <10 W designs. |
| IAS | 9 A - Survives unclamped inductive switching events (EAS = ½ × L × IAS²) in freewheeling paths. |
| IR (max) | 3.2 mA at 70 V / 125 °C - Limits standby power loss in always-on auxiliary rails. |
Pinout & Package
SOD128Flat is a surface-mount, dual-terminal, flat leaded package with exposed cathode pad for enhanced thermal conduction. Dimensions: 4.7 mm × 2.4 mm × 1.0 mm (L × W × H), lead pitch 3.8 mm, ECOPACK2-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Input current entry point | Connected to switching node (e.g., transformer secondary or MOSFET drain) in flyback/freewheeling path. |
| Cathode (K) | Output current exit point | Connected to output capacitor and load; large copper pour required for thermal dissipation and low ESR return path. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF/IR trade-off | 0.55 V @ 5 A/125 °C + 3.2 mA IR @ 70 V/125 °C - Minimizes combined conduction and leakage loss in 24 V auxiliary rails. |
| Avalanche ruggedness | IAS = 9 A (L = 300 µH, VDD = 15 V) - Eliminates need for external clamping in low-power freewheeling applications. |
| High Tj rating | 175 °C max junction temperature - Supports operation in thermally constrained spaces (e.g., enclosed smart meter modules). |
| Flat, space-saving package | SOD128Flat footprint: 4.7 mm × 2.4 mm - Fits 50% smaller board area than SMB Flat while maintaining 5 A rating. |
| ECOPACK2 compliance | Lead-free, halogen-free, RoHS-compliant - Meets EU environmental directives without derating or process change. |
Applications
| DC/DC Converter | LED Lighting Driver |
|---|---|
Use Scenario: 12 V/5 A isolated flyback converter powering industrial sensors. IC Role / Device Role / Timing Role: Freewheeling rectifier on secondary side, conducting during MOSFET off-time. Use Value: 0.55 V VF reduces conduction loss by 35% vs. standard Schottky, improving efficiency from 82% to 85.2% at full load. |
Use Scenario: Constant-current LED driver for streetlight modules with 36 V output. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant topology, handling 5 A pulsed current. Use Value: Low recovery charge minimizes ringing and EMI, easing EMC filter design and reducing BOM cost. |
| Auxiliary Power Supply | Telecom System Board |
Use Scenario: 5 V/2 A standby supply derived from main 48 V rail in server PSU. IC Role / Device Role / Timing Role: Secondary-side rectifier in self-oscillating flyback, operating continuously. Use Value: 175 °C Tj rating ensures reliability over 10-year life in sealed chassis with ambient up to 85 °C. |
Use Scenario: OR-ing diode in dual-input telecom line card with hot-swap capability. IC Role / Device Role / Timing Role: Reverse polarity protection and power-path selection diode. Use Value: Low VF enables <100 mV dropout at 3 A, minimizing voltage drop and heat generation in redundant 12 V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-50SQ030 | 30 V VRRM, 5 A IF(AV), VF = 0.42 V @ 5 A/25 °C - Lower voltage rating, higher VF at elevated Tj. | Only suitable for ≤30 V outputs; cannot replace in 100 V flyback or telecom auxiliary rails. | Select only when system VRRM ≤30 V and lowest room-temp VF is prioritized over thermal stability. |
| ON Semiconductor SB5100 | 100 V VRRM, 5 A IF(AV), VF = 0.85 V @ 5 A/25 °C, no avalanche rating - Higher conduction loss, no IAS spec. | Lacks avalanche ruggedness; requires external TVS/clamp in inductive freewheeling paths. | Acceptable only in non-inductive, low-dV/dt applications where surge immunity is not required. |
Compared with VS-50SQ030 and SB5100, STPST5H100AF uniquely combines 100 V rating, 0.55 V VF at 125 °C, and verified 9 A avalanche capability - making it the only option among the three qualified for unclamped flyback freewheeling in telecom and industrial SMPS.
Availability
STPST5H100AF is available at Aetrix Electronics and suitable for DC/DC converters, LED lighting drivers, and auxiliary power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for STPST5H100AF 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 analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
STPST5H100AF belongs to ST's trench Schottky rectifier product line, engineered specifically for high-efficiency, high-frequency switched-mode power supplies where thermal density, low-loss rectification, and reliability under transient stress are essential.
FAQ
What is the maximum allowable PCB copper area for optimal thermal performance in SOD128Flat?
For STPST5H100AF in SOD128Flat, thermal resistance junction-to-ambient drops to ~3.2 °C/W with ≥100 cm² total copper (50 cm² per lead), per Figure 11. Minimum recommended is 30 cm² per lead to maintain Tj < 150 °C at 5 A/120 °C ambient. Use internal layers and thermal vias for best results.
Can STPST5H100AF replace standard silicon diodes in existing 100 V flyback designs?
Yes - STPST5H100AF replaces 100 V fast-recovery diodes (e.g., UF4007) with immediate efficiency gain: typical VF reduction from 0.95 V to 0.55 V cuts conduction loss by ~42%. No circuit changes needed, but ensure layout accommodates SOD128Flat footprint and thermal copper.
Is STPST5H100AF qualified for automotive applications?
No - STPST5H100AF is not AEC-Q101 qualified. It is specified for industrial, telecom, and consumer power supplies. For automotive-grade equivalents, consider ST's AEC-Q101-certified STTH5L06 or STTH8R06 series, which share similar VF/IR performance but include extended temperature and qualification testing.
How does the SOD128Flat package compare thermally to SMB Flat and PSMC variants?
SOD128Flat offers Rth(j-l) = 10 °C/W, SMB Flat = 7.7 °C/W, and PSMC = 1.8 °C/W. While PSMC has superior thermal performance, SOD128Flat provides best-in-class power density: 5 A in 11.3 mm² footprint vs. 19.8 mm² (SMB) and 28.5 mm² (PSMC), ideal for space-constrained auxiliary rails.
STPST5H100AF 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):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 680 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 11.5 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD128Flat
- Operating Temperature - Junction:
- 175°C
STPST5H100AF FAQ
1.How can I place an order for STPST5H100AF through Aetrix?
Please submit a Request for Quotation (RFQ) for STPST5H100AF 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 STPST5H100AF reliable?
The price and inventory of STPST5H100AF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST5H100AF is usually 5 days.
3.What payment methods are accepted for STPST5H100AF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST5H100AF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPST5H100AF?
STPST5H100AF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPST5H100AF 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 STPST5H100AF?
For technical support, including STPST5H100AF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST5H100AF requirements.
6.How does Aetrix verify that STPST5H100AF is sourced from the original manufacturer or authorized distributors?
All STPST5H100AF 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 STPST5H100AF meets industry standards.
7.What is the process for return or replacement of STPST5H100AF?
All STPST5H100AF units undergo pre-shipment inspection (PSI). If there is an issue with STPST5H100AF, 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 STPST5H100AF part is unused and in its original packaging.
Return procedure for STPST5H100AF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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