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

STMicroelectronics STPS1L30AFN

Name: STPS1L30AFN
Brand: STMicroelectronics
SKU: STPS1L30AFN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS1L30AFN

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: STPS1L30AFN.pdf

Description:: DIODE SCHOTTKY 30V 1A SMAFLAT

Quantity:: RFQ Add To RFQ list

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Inventory:3,173

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Product details

Overview

STPS1L30AFN from STMicroelectronics is a 30 V, 1 A low-drop Schottky rectifier in SMA Flat Notch package, designed for high-frequency DC/DC converters and synchronous rectification with MOSFETs. It features a typical forward voltage of 0.26 V at 125 °C and 1 A, 150 °C maximum junction temperature, and avalanche-rated ruggedness for transient robustness in telecom and battery charger power stages.

For engineers reviewing the STPS1L30AFN datasheet, STPS1L30AFN pinout, STPS1L30AFN application, or STPS1L30AFN equivalent, key selection criteria include forward voltage drop at elevated temperature, thermal resistance (R_th(j-l) = 20 °C/W), avalanche energy capability (110 W @ 10 µs), and ECOPACK2 compliance for environmentally constrained designs.

Technical Context

This Schottky rectifier operates as a unidirectional, low-loss freewheeling or output rectifying device in switching power supplies. Its metal–semiconductor junction enables fast recovery (no reverse recovery charge) and low conduction loss, critical for efficiency in 100 kHz–1 MHz DC/DC topologies.

The device supports parallel operation with MOSFETs in synchronous rectification circuits due to its low VF and matched thermal profile. Its 20 °C/W junction-to-lead thermal resistance and flat notch cathode marking ensure reliable heat extraction and board-level orientation control in space-constrained layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	30 V - Maximum repetitive reverse blocking voltage; sets usable input/output voltage range in 24 V telecom and 12–28 V battery systems.
I_F(AV)	1 A - Average forward current at T_L = 140 °C; defines continuous DC output capability in compact adapters and SSD power rails.
V_F(typ.)	0.26 V @ 1 A, 125 °C - Low conduction loss directly reduces power dissipation (P ≈ 0.26 W) and improves thermal margin in sealed enclosures.
T_j(max)	150 °C - Maximum junction temperature; enables operation in high-ambient environments (e.g., enclosed battery chargers) without derating below rated current.
R_th(j-l)	20 °C/W - Junction-to-lead thermal resistance; allows direct PCB copper pad thermal coupling for passive cooling without heatsinks in ≤1 W applications.
P_ARM	110 W @ 10 µs - Repetitive peak avalanche power; sustains short overvoltage transients (e.g., inductive kickback) without failure in DC/DC flyback or buck-boost stages.

Pinout & Package

STPS1L30AFN uses the SMA Flat Notch surface-mount package (cathode indicated by band). The two-terminal device has no internal logic or control pins-Anode and Cathode are the only terminals, optimized for minimal parasitic inductance in high-frequency switching paths.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point under forward bias	Connected to switch node or transformer secondary; must be routed with low-inductance trace to minimize ringing during turn-on.
Cathode	Current exit point under forward bias	Marked by flat notch; ties to output rail or ground return; serves as primary thermal path to PCB copper via leadframe.

Key Features

Feature	Design Value
Very low forward voltage	V_F = 0.26 V @ 1 A, 125 °C - Reduces conduction loss by >30% vs. standard Schottkys, enabling higher efficiency in 5–12 V output converters.
Avalanche rated	110 W peak avalanche power @ 10 µs - Eliminates need for external clamping in non-isolated DC/DC where voltage overshoot exceeds V_RRM.
SMA Flat Notch package	0.039 g mass, 1.1 mm profile - Enables ultra-thin power modules (e.g., USB-C PD adapters) and automated optical inspection via cathode band alignment.
ECOPACK2 compliant	Lead-free, halogen-free, RoHS-compliant materials - Meets IPC-1752A Class 2 reporting requirements for automotive and industrial OEM BOMs.

Applications

Battery Charger Output Rectification

SSD Power Rail Protection

Use Scenario: 12 V input to 5 V/3.3 V buck converter in portable lithium-ion charger.

IC Role / Device Role / Timing Role: Output rectifier replacing diode in synchronous topology; conducts during low-side MOSFET off-time.

Use Value: 0.26 V V_F cuts conduction loss by ~0.15 W vs. legacy Schottky, reducing thermal stress on PCB and extending charger lifespan.

Use Scenario: Reverse polarity and backfeed protection on 3.3 V VCC rail of NVMe SSD controller.

IC Role / Device Role / Timing Role: Unidirectional isolation diode preventing power injection from PCIe slot into SSD during hot-plug events.

Use Value: 30 V V_RRM and 1 A I_F(AV) support full rail protection without derating; flat notch ensures correct orientation during SMT placement.

Telecom DC/DC Converter Freewheeling

Cordless Appliance Motor Drive Clamp

Use Scenario: Secondary-side rectification in 48 V to 12 V isolated DC/DC module for base station power management.

IC Role / Device Role / Timing Role: Freewheeling path for transformer leakage inductance energy during MOSFET dead time.

Use Value: Avalanche rating absorbs 110 W transient spikes without degradation, eliminating need for TVS or RCD snubbers in cost-sensitive telecom designs.

Use Scenario: Flyback clamp across brushed DC motor in cordless drill, suppressing inductive kick during PWM commutation.

IC Role / Device Role / Timing Role: Clamp diode conducting reverse EMF pulses when H-bridge low-side switches turn off.

Use Value: 150 °C T_j(max) and 20 °C/W R_th(j-l) sustain repeated 10 µs pulses without thermal runaway, ensuring reliability in high-duty-cycle tools.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MBR130LSFT1G	V_F = 0.45 V @ 1 A, 25 °C; R_th(j-l) = 25 °C/W; SMB package	Higher VF increases conduction loss by ~0.19 W at 1 A; larger SMB footprint requires more board area	Prefer when existing layout uses SMB or when slightly higher VF is acceptable for cost reduction
SS13	V_F = 0.5 V @ 1 A, 25 °C; no avalanche rating; SMA package	Lacks avalanche ruggedness; unsuitable for inductive clamp or transient-prone telecom inputs	Select only for non-critical, low-transient consumer applications where cost is primary driver

Compared with MBR130LSFT1G and SS13, STPS1L30AFN delivers superior thermal performance (20 °C/W), lower high-temperature VF, and verified avalanche capability-making it the preferred choice for thermally constrained, high-reliability DC/DC and battery systems.

Availability

STPS1L30AFN is available at Aetrix Electronics and suitable for telecom power supplies, SSD power management, and cordless appliance motor drives requiring stable component supply and long-term manufacturing continuity.

Supply support for STPS1L30AFN 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, specializing in power management, analog, microcontrollers, and automotive ICs.

STPS1L30AFN belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for miniaturized, high-frequency switched-mode power supplies where low VF and thermal robustness are critical.

FAQ

What is the cathode identification method for STPS1L30AFN?

The cathode is marked by a flat notch on the SMA Flat Notch package body, aligned with the cathode terminal. This physical feature enables automated optical inspection and prevents orientation errors during pick-and-place assembly-critical for high-yield SMT lines handling sub-2 mm components.

Can STPS1L30AFN replace a standard PN diode in an existing 30 V, 1 A design?

Yes-its 30 V V_RRM and 1 A I_F(AV) match common PN diodes, but STPS1L30AFN eliminates reverse recovery charge and reduces forward drop by ~0.3 V, cutting conduction loss and EMI. No circuit changes are needed beyond verifying thermal pad layout matches the SMA Flat Notch footprint.

Is STPS1L30AFN suitable for synchronous rectification with a 100 kHz gate driver?

Yes-its zero reverse recovery time and low VF make it ideal for synchronous rectification up to 1 MHz. At 100 kHz, it pairs seamlessly with N-channel MOSFETs; the 20 °C/W R_th(j-l) ensures thermal stability even with tight gate drive timing and minimal dead time.

Does STPS1L30AFN require a heatsink in a 1 A, 12 V output application?

No-heatsinking is unnecessary. With 0.26 V V_F at 1 A and 20 °C/W R_th(j-l), power dissipation is ~0.26 W. Using a 1 cm² copper pad per lead keeps junction temperature ≤105 °C at 60 °C ambient-well within the 150 °C limit without added thermal mass.

STPS1L30AFN 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):: 30 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 395 mV @ 1 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 200 µA @ 30 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMAflat Notch

Operating Temperature - Junction:: 150°C

STPS1L30AFN FAQ

1.How can I place an order for STPS1L30AFN through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS1L30AFN 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 STPS1L30AFN reliable?

The price and inventory of STPS1L30AFN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1L30AFN is usually 5 days.

3.What payment methods are accepted for STPS1L30AFN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1L30AFN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS1L30AFN?

STPS1L30AFN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS1L30AFN 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 STPS1L30AFN?

For technical support, including STPS1L30AFN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1L30AFN requirements.

6.How does Aetrix verify that STPS1L30AFN is sourced from the original manufacturer or authorized distributors?

All STPS1L30AFN 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 STPS1L30AFN meets industry standards.

7.What is the process for return or replacement of STPS1L30AFN?

All STPS1L30AFN units undergo pre-shipment inspection (PSI). If there is an issue with STPS1L30AFN, 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 STPS1L30AFN part is unused and in its original packaging.

Return procedure for STPS1L30AFN:

1.Submit a request within 90 days.

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

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