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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics STPS3150AFN

Name: STPS3150AFN
Brand: STMicroelectronics
SKU: STPS3150AFN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS3150AFN

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: STPS3150AFN.pdf

Description:: DIODE SCHOTTKY 150V 3A SMAFLAT

Quantity:: RFQ Add To RFQ list

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Inventory:6,494

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Product details

Overview

STPS3150AFN from STMicroelectronics is a 150 V, 3 A surface-mount Schottky power rectifier in SMA Flat Notch package, designed for high-frequency DC/DC converters and notebook adapters where low forward voltage (0.63 V typ. at 125 °C, 3 A) minimizes conduction loss and extends battery life. It features negligible switching losses, 175 °C max junction temperature, and ECOPACK2 environmental compliance.

For engineers reviewing the STPS3150AFN datasheet, STPS3150AFN pinout, STPS3150AFN application, or STPS3150AFN equivalent, key selection criteria include thermal resistance (20 °C/W junction-to-lead), reverse leakage (<0.6 mA at 125 °C), surge current capability (75 A), and footprint compatibility with FR4 PCBs using recommended 3.12 × 5.52 mm land pattern.

Technical Context

This Schottky rectifier operates as a unidirectional, majority-carrier device with no minority-carrier storage delay-enabling zero reverse recovery time and eliminating switching-related losses in SMPS operating above 100 kHz. Its low VF and high Tj(max) support compact, thermally constrained designs in consumer power supplies.

The SMA Flat Notch package provides low thermal resistance (20 °C/W j-l) and cathode identification via band marking, while its flat notch geometry ensures mechanical stability during reflow and improves heat transfer to copper pads. Electrical performance remains stable across -65 °C to +175 °C storage and operating ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	150 V - Blocks up to 150 V reverse voltage without breakdown, suitable for 24 V rail systems with safety margin.
IF(AV)	3 A - Sustains 3 A average forward current at TL = 130 °C with SMB/SMA Flat Notch mounting, enabling compact PSU designs.
VF(typ.)	0.63 V @ 125 °C, 3 A - Reduces conduction loss to ~1.9 W (P ≈ 0.59×IF + 0.027×IF²), critical for efficiency in battery-powered adapters.
Tj(max.)	+175 °C - Allows operation in thermally aggressive environments (e.g., enclosed LED drivers) without derating below rated current.
Rth(j-l)	20 °C/W - Enables direct thermal path from die to PCB leads; requires ≥10 mm lead length for stable thermal modeling per AN5088.
IR	0.6 mA @ 125 °C, VR = VRM - Low leakage preserves standby efficiency in always-on charging circuits.
ECOPACK2	Lead-free, RoHS-compliant, halogen-free epoxy - Meets IEC 61249-2-21 and JEDEC J-STD-020 reflow requirements.

Pinout & Package

SMA Flat Notch package: surface-mount, cathode-indicated band, UL94 V0 epoxy, 0.039 g weight, 10,000 pcs/reel tape-and-reel delivery. Dimensions: D = 2.25–2.90 mm, E = 5.00–5.35 mm, E1 = 3.95–4.60 mm, L = 0.75–1.20 mm (per DS3283 Rev 7, Fig. 14 & Table 4).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., switch node in buck converter); must be routed with low-inductance trace to minimize ringing.
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to output rail or ground return; requires thermal pad connection for Rth(j-a) optimization per Figure 10.

Key Features

Feature	Design Value
Negligible switching losses	Zero reverse recovery time enables >500 kHz operation without snubbers or loss penalties in high-frequency SMPS.
Low VF at elevated temperature	0.63 V typ. @ 125 °C ensures stable efficiency across full thermal range-critical for sealed notebook adapters.
Low thermal resistance (j-l)	20 °C/W allows direct PCB heat sinking without external heatsink, reducing BOM count and board area in space-constrained LED drivers.
ECOPACK2 compliance	Halogen-free, lead-free construction meets global environmental mandates (RoHS, REACH, China RoHS II) without performance trade-offs.
High surge current rating	75 A non-repetitive surge (tp = 10 ms) withstands inrush events in battery charger input stages without failure.

Applications

LED Lighting

Battery Charger

Use Scenario: Constant-current LED driver in downlight modules with 24 V input and 15–20 W output.

IC Role / Device Role / Timing Role: Output rectifier in secondary-side synchronous or quasi-resonant flyback topology.

Use Value: 0.63 V VF reduces output-stage power loss by ~0.45 W vs. silicon diode, lowering thermal stress on aluminum PCB and extending LED lifetime.

Use Scenario: AC/DC adapter for USB-C PD-enabled smartphones, delivering 18–30 W at 9–15 V output.

IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in active-clamp forward converter.

Use Value: Zero Qrr eliminates switching loss during 200–300 kHz transitions, improving light-load efficiency by 2.1% over standard Schottky alternatives.

DC/DC Converter

Notebook Adapter

Use Scenario: 48 V–12 V intermediate bus converter in industrial IoT gateway with 10 A output.

IC Role / Device Role / Timing Role: Synchronous rectifier replacement in isolated half-bridge LLC resonant stage.

Use Value: 175 °C Tj(max) supports continuous 3 A conduction under 75 °C ambient with minimal derating, enabling smaller heatsink volume.

Use Scenario: 19.5 V, 3.33 A OEM notebook adapter with <15 mm height constraint.

IC Role / Device Role / Timing Role: Primary-side auxiliary supply rectifier feeding PWM controller bias rail.

Use Value: SMA Flat Notch footprint (3.12 × 5.52 mm) fits tight layout; 0.039 g mass reduces mechanical stress during drop testing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS3H15-E3/57T (Vishay)	Same 150 V VRRM, 3 A IF(AV), but VF = 0.82 V typ. @ 25 °C, 3 A; Rth(j-l) = 25 °C/W.	Higher VF increases conduction loss by ~0.57 W at 3 A, requiring larger thermal pad area for same Tj rise.	Select when cost sensitivity outweighs efficiency targets and thermal budget permits higher VF.
MBR3150F (ON Semiconductor)	Identical 150 V/3 A rating, VF = 0.78 V typ. @ 25 °C, 3 A; SMB package (Rth(j-l) = 20 °C/W), not SMA Flat Notch.	SMB footprint differs-requires PCB redesign; same thermal performance but larger body (3.3 × 5.6 mm vs. 2.9 × 5.4 mm).	Select when existing SMB layout reuse is prioritized and cathode band orientation matches.

Compared with SS3H15-E3/57T and MBR3150F, STPS3150AFN delivers the lowest VF at elevated temperature (0.63 V @ 125 °C), smallest footprint (SMA Flat Notch), and best thermal interface for ultra-thin adapters-making it optimal for thermally dense, high-efficiency consumer power designs.

Availability

STPS3150AFN is available at Aetrix Electronics and suitable for LED lighting drivers, portable battery chargers, and notebook AC adapters requiring stable component supply, consistent thermal performance, and ECOPACK2 environmental compliance.

Supply support for STPS3150AFN 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STPS3150 series belongs to ST's high-efficiency power rectifier product line, engineered specifically for high-frequency switch-mode power supplies where low VF, zero Qrr, and robust thermal behavior are mandatory for miniaturized, energy-efficient designs.

FAQ

What is the maximum allowable PCB copper area under each lead for optimal thermal performance?

Per Figure 10 in DS3283 Rev 7, Rth(j-a) drops from ~4.5 °C/W to ~2.5 °C/W when copper area increases from 0 to 200 cm² per lead on FR4 (35 µm Cu). For STPS3150AFN in SMA Flat Notch, minimum recommended copper area is 50 cm² per lead to maintain Tj ≤ 125 °C at 3 A ambient of 50 °C.

Can STPS3150AFN replace a standard PN-junction rectifier in an existing 24 V, 3 A flyback design?

Yes-STPS3150AFN can directly replace PN diodes like 1N5408 in secondary-side rectification. Its zero Qrr eliminates snubber networks, and 0.63 V VF reduces power loss by ~1.2 W versus 1.1 V silicon diodes. Verify layout clearance for SMA Flat Notch dimensions and ensure cathode polarity alignment.

Is STPS3150AFN suitable for automotive infotainment power supplies?

No-STPS3150AFN is qualified for consumer and computing applications (AEC-Q100 not specified). While its 175 °C Tj(max) exceeds automotive junction limits, it lacks automotive-grade qualification, PPAP documentation, and guaranteed lot traceability required for Tier-1 automotive use.

How does the SMA Flat Notch package differ mechanically from standard SMA?

SMA Flat Notch features a flattened edge ("notch") on one side of the molded body to prevent rotation during placement and improve coplanarity. Its D dimension (2.25–2.90 mm) is narrower than standard SMA (3.5–4.5 mm), and E1 (3.95–4.60 mm) is shorter-enabling tighter pitch layouts and reduced board area usage in space-constrained adapters.

STPS3150AFN 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):: 3A

Voltage - Forward (Vf) (Max) @ If:: 820 mV @ 3 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 2 µA @ 150 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMAflat Notch

Operating Temperature - Junction:: 175°C

STPS3150AFN FAQ

1.How can I place an order for STPS3150AFN through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS3150AFN 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 STPS3150AFN reliable?

The price and inventory of STPS3150AFN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS3150AFN is usually 5 days.

3.What payment methods are accepted for STPS3150AFN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS3150AFN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS3150AFN?

STPS3150AFN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS3150AFN 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 STPS3150AFN?

For technical support, including STPS3150AFN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS3150AFN requirements.

6.How does Aetrix verify that STPS3150AFN is sourced from the original manufacturer or authorized distributors?

All STPS3150AFN 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 STPS3150AFN meets industry standards.

7.What is the process for return or replacement of STPS3150AFN?

All STPS3150AFN units undergo pre-shipment inspection (PSI). If there is an issue with STPS3150AFN, 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 STPS3150AFN part is unused and in its original packaging.

Return procedure for STPS3150AFN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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