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STMicroelectronics STPS2150AFN
- Part No.:
- STPS2150AFN
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
STPS2150AFN.pdf
- Description:
- DIODE SCHOTTKY 150V 2A SMAFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:144
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Product details
Overview
STPS2150AFN from STMicroelectronics is a 150 V, 2 A surface-mount Schottky power rectifier in SMA Flat Notch package, optimized for high-frequency DC/DC converters and SMPS on ≤24 V rails. It delivers low forward voltage (0.62 V typ. at 125 °C, 2 A), negligible switching losses, and avalanche-rated operation up to 170 W (10 µs pulse) for robust transient handling in telecom and computing power supplies.
For engineers reviewing the STPS2150AFN datasheet, STPS2150AFN pinout, STPS2150AFN application, or STPS2150AFN equivalent, key selection criteria include forward voltage drop at elevated temperature, thermal resistance (20 °C/W junction-to-lead), avalanche capability, ECOPACK2 compliance, and SMA Flat Notch footprint compatibility with high-density PCB layouts.
Technical Context
This Schottky rectifier operates without minority-carrier storage delay, enabling zero reverse recovery charge and eliminating switching losses in high-frequency topologies. Its metal–semiconductor junction supports continuous conduction up to 175 °C junction temperature and withstands repetitive 150 V reverse voltage with leakage <1.5 µA at 25 °C.
The device uses planar construction with gold-metallized cathode band marking and is qualified per JEDEC standards for surface-mount reliability. Thermal performance is defined by junction-to-lead resistance (20 °C/W), not junction-to-ambient, requiring PCB copper area design per Figure 11 for safe operation at full 2 A average current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling paths |
| IF(AV) | 2 A - Average forward current at TL = 145 °C; sets continuous power delivery capacity in DC/DC output stage |
| VF(typ.) | 0.62 V @ 125 °C, 2 A - Low conduction loss enables >92% efficiency in 12 V → 5 V buck converters |
| Rth(j-L) | 20 °C/W - Junction-to-lead thermal resistance; requires ≥1.2 cm² copper per lead for 2 A derating per Figure 11 |
| PARM | 170 W @ 10 µs, Tj = 125 °C - Avalanche energy rating ensures survivability during inductive turn-off transients |
| Tj(max) | +175 °C - Maximum junction temperature; allows operation in sealed telecom enclosures without forced air |
| ECOPACK2 | Compliant - Halogen-free, RoHS-compliant packaging meeting EU environmental directives for industrial use |
Pinout & Package
STPS2150AFN is housed in an SMA Flat Notch surface-mount package with cathode indicated by a band. The two-terminal device has no internal connections beyond anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to switch node or transformer secondary; must handle surge current up to 70 A (non-repetitive) |
| Cathode | Output terminal for forward conduction | Marked by flat notch and band; connects to output filter capacitor and load return path |
Key Features
| Feature | Design Value |
|---|---|
| Negligible switching losses | No reverse recovery time (Qrr = 0); eliminates snubber circuits and EMI in >500 kHz converters |
| Low VF at high temperature | 0.62 V typ. at 125 °C enables stable regulation under thermal stress in compact enclosures |
| Avalanche capability | Rated 170 W peak avalanche power ensures reliability during MOSFET turn-off overshoot in synchronous rectifiers |
| Low thermal resistance | 20 °C/W junction-to-lead allows direct PCB heat spreading without external heatsink in ≤2 A designs |
| ECOPACK2 compliance | Halogen-free molding compound meets IEC 61249-2-21 and RoHS 2011/65/EU for green manufacturing |
Applications
| Telecom DC/DC Converters | Server VRMs |
|---|---|
Use Scenario: 48 V input to 12 V/5 V intermediate bus conversion in telecom line cards with space constraints. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter output stage, conducting during low-side FET off-time. Use Value: 0.62 V VF reduces conduction loss by 35% vs. standard silicon diodes, lowering thermal load on adjacent ASICs. | Use Scenario: Point-of-load (POL) conversion feeding CPU/GPU core rails in enterprise servers. IC Role / Device Role / Timing Role: Secondary-side rectifier in multiphase buck converters operating at 300–600 kHz switching frequency. Use Value: Zero Qrr eliminates reverse recovery spikes, reducing gate drive stress on synchronous MOSFETs and easing EMI filtering. |
| Laptop AC-DC Adapters | Industrial PLC Power Supplies |
Use Scenario: Secondary-side rectification in compact 65 W laptop adapters with high power density requirements. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology, conducting during transformer reset phase. Use Value: SMA Flat Notch footprint (3.12 × 5.52 mm) fits tight layout constraints while maintaining 2 A DC rating at 70 °C ambient. | Use Scenario: Input rectification in isolated 24 V DC power modules for programmable logic controllers. IC Role / Device Role / Timing Role: Input protection and polarity guard in redundant 24 V supply inputs with reverse polarity tolerance. Use Value: 175 °C max junction temperature supports operation in unventilated control cabinets up to 75 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS215H | Same 150 V VRRM, 2 A IF(AV), but SMA package (not Flat Notch); Rth(j-L) = 20 °C/W identical; VF = 0.72 V typ. @ 125 °C | No flat notch; requires different PCB footprint and lacks cathode band visual indicator | Select when legacy SMA land pattern exists and cathode marking is less critical than footprint reuse |
| SB2150 | 150 V VRRM, 2 A IF(AV), DO-15 axial package; higher Rth(j-a) = 30 °C/W; VF = 0.75 V typ. @ 125 °C | Through-hole mounting only; unsuitable for automated SMT assembly or high-density boards | Select only for prototyping or low-volume through-hole designs where thermal mass compensates for lower efficiency |
Compared with SS215H and SB2150, STPS2150AFN provides the lowest forward voltage in its class with standardized SMA Flat Notch mounting, enabling tighter thermal management and automated optical inspection via cathode band-critical for high-reliability telecom and server power modules.
Availability
STPS2150AFN is available at Aetrix Electronics and suitable for telecom DC/DC converters, server VRMs, and industrial PLC power supplies requiring stable component supply, consistent thermal performance, and ECOPACK2-compliant sourcing.
Supply support for STPS2150AFN 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.
STPS2150AFN belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, high-density power conversion where low VF, avalanche ruggedness, and surface-mount reliability are mandatory.
FAQ
What is the maximum allowable PCB copper area for STPS2150AFN at 2 A continuous current?
Per Figure 11 in DS3282 Rev 8, the recommended minimum copper area under each lead is 1.2 cm² on FR4 board with 35 µm copper thickness. This achieves ~40 °C/W junction-to-ambient resistance, allowing full 2 A operation at 70 °C ambient without exceeding 145 °C lead temperature.
Does STPS2150AFN require a heatsink in typical 2 A applications?
No heatsink is required if PCB copper area per lead meets the 1.2 cm² minimum specified in Figure 11. The 20 °C/W junction-to-lead thermal resistance enables sufficient self-cooling via conduction through leads into copper planes, provided solder joint integrity and board stack-up meet IPC-7095 guidelines.
How does the avalanche rating of STPS2150AFN improve system reliability?
The 170 W avalanche power rating (at 10 µs, Tj = 125 °C) allows the device to absorb inductive energy during MOSFET turn-off events without failure. This protects against voltage overshoot in synchronous rectifier configurations and extends lifetime in telecom power supplies exposed to frequent load transients.
Is STPS2150AFN compatible with lead-free reflow profiles?
Yes-STPS2150AFN is qualified for standard lead-free reflow per J-STD-020, with peak temperature up to 260 °C for 10 seconds. The epoxy meets UL 94 V0 and the SMA Flat Notch package withstands thermal cycling without delamination or solder joint fracture under IPC-9701 Class 2 conditions.
STPS2150AFN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 820 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1.5 µA @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAflat Notch
- Operating Temperature - Junction:
- 175°C
STPS2150AFN FAQ
1.How can I place an order for STPS2150AFN through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS2150AFN 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 STPS2150AFN reliable?
The price and inventory of STPS2150AFN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2150AFN is usually 5 days.
3.What payment methods are accepted for STPS2150AFN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2150AFN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS2150AFN?
STPS2150AFN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS2150AFN 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 STPS2150AFN?
For technical support, including STPS2150AFN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2150AFN requirements.
6.How does Aetrix verify that STPS2150AFN is sourced from the original manufacturer or authorized distributors?
All STPS2150AFN 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 STPS2150AFN meets industry standards.
7.What is the process for return or replacement of STPS2150AFN?
All STPS2150AFN units undergo pre-shipment inspection (PSI). If there is an issue with STPS2150AFN, 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 STPS2150AFN part is unused and in its original packaging.
Return procedure for STPS2150AFN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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