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STMicroelectronics STPST2H100AF
- Part No.:
- STPST2H100AF
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
STPST2H100AF.pdf
- Description:
- 100 V, 2 A POWER SCHOTTKY TRENCH
- Quantity:
- Payment:
- Shipping:
Inventory:11,878
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Product details
Overview
STPST2H100AF from STMicroelectronics is a 2 A, 100 V Schottky trench rectifier in SOD128Flat package, optimized for high-frequency SMPS with low conduction and switching losses. It features 0.620 V typical forward voltage at 2 A/125 °C, 175 °C max junction temperature, and avalanche-rated (3 A) operation-ideal for auxiliary power supplies in telecom and smart metering.
For engineers reviewing the STPST2H100AF datasheet, STPST2H100AF pinout, STPST2H100AF application, or STPST2H100AF equivalent, key selection criteria include VF/IR trade-off at high Tj, flat-package thermal performance (Rth(j-l) = 14 °C/W), and compatibility with ST VIPer controllers in flyback topologies.
Technical Context
This Schottky rectifier uses ST's proprietary trench technology to achieve superior forward voltage versus reverse leakage balance across temperature-enabling stable operation up to 175 °C junction temperature while maintaining <0.75 mA IR at 70 V/125 °C. Its low Qrr and soft recovery reduce EMI in high-frequency DC/DC converters.
The device is rated for unclamped inductive switching (IAS = 3 A, L = 300 µH), supporting robust freewheeling and OR-ing functions. Its SOD128Flat package delivers 14 °C/W junction-to-lead thermal resistance, enabling compact PCB layouts without external heatsinking in ≤2 A auxiliary rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports input rails up to 85 V DC with margin for transient spikes in SMPS |
| IF(AV) | 2 A at TL = 140 °C - enables continuous 2 A output in space-constrained auxiliary supplies |
| VF (typ.) | 0.620 V @ 2 A, 125 °C - reduces conduction loss to ~1.24 W vs. 1.5+ V for standard Schottkys |
| Tj (max.) | +175 °C - allows operation in thermally dense telecom/server environments without derating |
| Rth(j-l) | 14 °C/W - enables direct PCB copper cooling; 10 °C rise per 0.7 A RMS current |
| IAS | 3 A - withstands 300 µH inductive turn-off energy (EAS ≈ 0.675 mJ) without failure |
| ECOPACK2 | Lead-free, RoHS-compliant packaging - meets industrial and telecom environmental mandates |
Pinout & Package
SOD128Flat surface-mount package: 2-terminal, cathode-marked, lead-free, epoxy UL94-V0 compliant. Dimensions: 2.30–2.50 mm (D), 4.60–4.80 mm (E), 0.55–0.85 mm (L). Optimized for automated placement and reflow soldering on FR4 boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to low-side switch node (e.g., MOSFET drain) in flyback/freewheeling paths |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail; polarity marking ensures correct orientation for OR-ing or reverse protection |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature capability | Rated for continuous operation at TJ = 175 °C-eliminates need for thermal derating in sealed enclosures |
| Low VF/IR trade-off | 0.620 V @ 2 A/125 °C and <0.75 mA IR @ 70 V/125 °C-minimizes both conduction loss and standby leakage |
| Avalanche ruggedness | IAS = 3 A tested per unclamped inductive switching-ensures reliability during MOSFET turn-off transients |
| Flat package thermal path | Rth(j-l) = 14 °C/W-direct heat transfer to PCB copper improves power density vs. DO-214 packages |
| ECOPACK2 compliance | Lead-free, halogen-free, RoHS-compliant-meets EU, China, and Japan environmental regulations |
Applications
| Telecom Auxiliary Supply | Smart Meter Power Rail |
|---|---|
|
Use Scenario: Isolated 12 V auxiliary supply in 48 V telecom line cards, powering control logic and monitoring ICs. IC Role / Device Role / Timing Role: Freewheeling diode in flyback converter secondary side, conducting during MOSFET off-time. Use Value: 0.620 V VF at 125 °C cuts conduction loss by ~35% vs. legacy Schottkys, reducing thermal stress on small PCB areas. |
Use Scenario: Primary-side bias supply in single-phase smart meters with wide input range (85–265 V AC). IC Role / Device Role / Timing Role: Output rectifier in low-power flyback delivering 5 V/2 A to MCU and RTC. Use Value: 175 °C Tj rating allows uninterrupted operation inside sealed meter housings exceeding 85 °C ambient. |
| Server PSU Standby Converter | LED Driver Auxiliary Bias |
|
Use Scenario: 5 V/1.5 A standby rail in 1U server PSUs, active during sleep mode and wake-up sequencing. IC Role / Device Role / Timing Role: OR-ing diode combining outputs of redundant standby converters. Use Value: Low Qrr and soft recovery suppress voltage overshoot during dynamic load transitions, improving system stability. |
Use Scenario: Bias supply for LED driver ICs in outdoor streetlights operating at -40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Reverse polarity protection diode on 24 V input rail feeding constant-current controller. Use Value: Avalanche-tested construction prevents failure during load dump events common in automotive-grade lighting systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS2H100S | SMB Flat package, Rth(j-l) = 11 °C/W, IF(AV) = 2 A at TL = 150 °C | Better thermal dissipation but larger footprint; suited for higher ambient or forced-air cooled designs | Select when board space permits and junction temperature must stay below 150 °C under full load |
| SS210H | Standard planar Schottky, VF = 0.85 V @ 2 A/25 °C, Tj(max) = 150 °C, no avalanche rating | Higher conduction loss and lower temperature margin; not suitable for telecom or sealed-meter use | Acceptable only for cost-sensitive, low-ambient, non-critical auxiliary rails where 175 °C rating is unnecessary |
Compared with STPST2H100AF, STPS2H100S offers lower thermal resistance but requires more PCB area, while SS210H sacrifices 25 °C junction margin and avalanche robustness for lower unit cost-making STPST2H100AF optimal for thermally demanding, reliability-critical auxiliary power.
Availability
STPST2H100AF is available at Aetrix Electronics and suitable for telecom auxiliary supplies, smart metering power rails, and server standby converters requiring stable component supply, long-term lifecycle support, and ECOPACK2 compliance.
Supply support for STPST2H100AF 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
STPST2H100AF belongs to ST's trench Schottky rectifier product line-engineered specifically for high-efficiency, high-temperature auxiliary and secondary-side power conversion in compact, high-reliability SMPS.
FAQ
What is the maximum allowable PCB copper area needed for thermal management of STPST2H100AF?
At 2 A average current and 140 °C lead temperature, ST recommends ≥1.5 cm² of 70 µm copper per lead on FR4. The SOD128Flat footprint supports this via its 4.6–4.8 mm E dimension, enabling direct thermal coupling to internal or external copper planes without thermal vias.
Does STPST2H100AF support synchronous rectification replacement?
No-STPST2H100AF is a passive Schottky rectifier and lacks gate control. It is not a synchronous rectifier IC or driver. For synchronous designs, ST recommends pairing it with ST's SRK1001 or SRK2001 controllers driving external MOSFETs.
How does the avalanche rating impact real-world reliability in flyback converters?
The 3 A IAS rating ensures survival during worst-case unclamped inductive switching events-such as MOSFET short-circuit or transformer saturation-where stored energy (EAS ≈ 0.675 mJ) would otherwise destroy conventional Schottkys. This eliminates need for snubbers in many auxiliary designs.
Is STPST2H100AF pin-compatible with STPST2H100ZF or STPST2H100UF?
No-STPST2H100ZF (SOD123Flat), STPST2H100AF (SOD128Flat), and STPST2H100UF (SMB Flat) share identical electrical specs but differ mechanically. Footprints, thermal pads, and reflow profiles are not interchangeable; each requires dedicated PCB layout and stencil design.
STPST2H100AF 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):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 805 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 2.7 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD128Flat
- Operating Temperature - Junction:
- 175°C
STPST2H100AF FAQ
1.How can I place an order for STPST2H100AF through Aetrix?
Please submit a Request for Quotation (RFQ) for STPST2H100AF 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 STPST2H100AF reliable?
The price and inventory of STPST2H100AF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPST2H100AF is usually 5 days.
3.What payment methods are accepted for STPST2H100AF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPST2H100AF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPST2H100AF?
STPST2H100AF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPST2H100AF 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 STPST2H100AF?
For technical support, including STPST2H100AF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPST2H100AF requirements.
6.How does Aetrix verify that STPST2H100AF is sourced from the original manufacturer or authorized distributors?
All STPST2H100AF 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 STPST2H100AF meets industry standards.
7.What is the process for return or replacement of STPST2H100AF?
All STPST2H100AF units undergo pre-shipment inspection (PSI). If there is an issue with STPST2H100AF, 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 STPST2H100AF part is unused and in its original packaging.
Return procedure for STPST2H100AF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPST2H100AF Tags
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