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

STMicroelectronics STPS1L30U

Name: STPS1L30U
Brand: STMicroelectronics
SKU: STPS1L30U
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS1L30U

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: STPS1L30U.pdf

Description:: DIODE SCHOTTKY 30V 1A SMB

Quantity:: RFQ Add To RFQ list

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Inventory:29,731

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Product details

Overview

STPS1L30U from STMicroelectronics is a 30 V, 1 A low-drop Schottky rectifier in SMB 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, avalanche rating up to 110 W (10 µs), and maximum junction temperature of 150 °C - enabling compact, thermally efficient power stages in telecom and battery charger applications.

For engineers reviewing the STPS1L30U datasheet, STPS1L30U pinout, STPS1L30U application, or STPS1L30U equivalent, key selection criteria include its 30 V reverse voltage rating, 1 A average forward current capability, thermal resistance (R_th(j-l) = 25 °C/W), ECOPACK2 compliance, and SMB surface-mount footprint compatibility with FR4 PCBs using 35 µm copper.

Technical Context

This Schottky rectifier operates as a unidirectional, low-loss freewheeling or output rectifying device in switching power supplies. Its low V_F (0.26–0.30 V at 125 °C) minimizes conduction loss, while its 30 V V_RRM and 75 A I_FSM support robust operation in 12–24 V input DC/DC topologies.

The device uses a planar Schottky barrier structure with metal-silicon junction, optimized for fast recovery (no minority carrier storage) and stable performance across –65 °C to +150 °C ambient. Its SMB package provides 25 °C/W junction-to-lead thermal resistance and supports 140 °C lead temperature under 1 A DC load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	30 V - Maximum repetitive reverse blocking voltage; defines usable input/output voltage range in 24 V nominal systems.
I_F(AV)	1 A - Average forward current at T_L = 140 °C; sets continuous DC output capability in SMB-packaged designs.
V_F(typ.)	0.26 V @ 1 A, 125 °C - Low conduction loss enables >95% efficiency in 5–12 V output converters at full load.
R_th(j-l)	25 °C/W - Junction-to-lead thermal resistance; determines heatsinking requirement when mounted on standard FR4 with 1.62 cm² copper per lead.
T_j(max)	+150 °C - Maximum operating junction temperature; allows reliable operation in sealed enclosures without active cooling.
I_R	6 mA @ 100 °C, V_R = 30 V - Reverse leakage impacts light-load efficiency and standby power in always-on systems.
ECOPACK2	Lead-free, RoHS-compliant packaging - meets industrial and telecom environmental compliance requirements without exemption waivers.

Pinout & Package

STPS1L30U is housed in an SMB (DO-214AA) surface-mount package with cathode band marking. The two-terminal device has no internal connections beyond anode and cathode; thermal path is optimized through the leads to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connected to switch node or transformer secondary; must withstand peak reverse voltage and surge current during turn-off.
Cathode	Output current exit point	Connected to output filter capacitor or load; marked by band; carries full DC output current and requires low-impedance PCB trace routing.

Key Features

Feature	Design Value
Very low forward voltage drop	0.26 V typ. @ 125 °C/1 A reduces conduction loss by ~40% vs. standard silicon diodes in same package.
Avalanche rated	110 W repetitive peak avalanche power (10 µs) enables safe operation during transient overvoltage events in flyback or LLC circuits.
SMA/SMB/SMA Flat Notch variants	Three package options allow layout flexibility: SMB offers best thermal resistance (25 °C/W), SMA Flat Notch enables ultra-thin profile (<1.1 mm height).
ECOPACK2 compliance	Lead-free, halogen-free, RoHS-compliant construction meets EU Directive 2011/65/EU and IPC-1752A reporting standards.

Applications

Telecom Power Supply

Battery Charger Output Stage

Use Scenario: 48 V input to 12 V/1 A isolated DC/DC converter in base station power module.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacing MOSFET gate driver + FET pair in active clamp forward topology.

Use Value: Eliminates gate drive complexity and timing skew risk while maintaining <0.3 V forward drop at full load and 100 kHz switching frequency.

Use Scenario: 19.5 V laptop adapter output rectification stage delivering 1 A to Li-ion battery management IC.

IC Role / Device Role / Timing Role: Low-loss freewheeling diode in buck-derived charging circuit with integrated controller.

Use Value: Reduces thermal rise by 12 °C vs. standard Schottky in same SMB footprint, enabling smaller heatsink or higher power density.

SSD Power Rail Rectification

Cordless Appliance DC Bus

Use Scenario: 5 V standby rail generation from USB-C PD source in NVMe SSD enclosure with dual-rail power architecture.

IC Role / Device Role / Timing Role: Input protection and reverse polarity blocking diode on auxiliary 5 V supply line.

Use Value: 30 V rating prevents breakdown during hot-plug transients; 6 mA max reverse leakage at 100 °C avoids standby current drift in thermal-critical storage modules.

Use Scenario: 21 V motor drive bus rectification in cordless drill with dual-cell Li-ion pack and integrated DC/DC for logic rails.

IC Role / Device Role / Timing Role: Freewheeling path for brushed DC motor commutation spikes during PWM off-time.

Use Value: Avalanche rating absorbs 75 A surge currents from inductive kickback without failure, extending tool runtime reliability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor SB130	Same 30 V V_RRM, 1 A I_F(AV), but VF = 0.45 V typ. @ 25 °C - 72% higher conduction loss at room temp.	Higher thermal rise limits use in sealed battery packs; not rated for avalanche operation.	Select only where cost sensitivity outweighs efficiency and ruggedness requirements.
Vishay SS13	Identical SMB package and 30 V/1 A rating, but VF = 0.42 V typ. @ 125 °C - 62% higher than STPS1L30U's 0.26 V.	No specified avalanche rating; R_th(j-l) = 30 °C/W - 20% worse thermal performance than STPS1L30U.	Acceptable for non-critical consumer adapters with ample airflow, but not for telecom or industrial DC/DC.

Compared with SB130 and SS13, STPS1L30U delivers superior thermal efficiency (0.26 V V_F), verified avalanche ruggedness (110 W), and lower junction-to-lead resistance (25 °C/W), making it the preferred choice for space-constrained, high-reliability DC/DC converters requiring long-term stability.

Availability

STPS1L30U is available at Aetrix Electronics and suitable for telecom power supplies, battery charger output stages, SSD auxiliary rails, and cordless appliance motor drives requiring stable component supply and consistent SMB footprint compatibility.

Supply support for STPS1L30U 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 industrial, automotive, and consumer markets.

STPS1L30U belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for miniaturized, high-frequency switched-mode power supplies where low forward voltage and thermal robustness are critical.

FAQ

What is the maximum allowable PCB copper area per lead to achieve the rated 1 A average current?

The datasheet specifies 140 °C lead temperature limit at 1 A DC for SMB package. To meet this, each lead requires ≥1.62 cm² of 35 µm-thick FR4 copper (per Figure 10). Using less copper increases thermal resistance and forces derating below 1 A in enclosed environments.

Does STPS1L30U require a heatsink in typical 1 A DC/DC applications?

No external heatsink is required if PCB layout follows ST's recommended footprint (5.84 mm × 2.60 mm) with ≥1.62 cm² copper per lead. Thermal testing shows junction temperature remains ≤125 °C at 1 A, 50 °C ambient, with natural convection only.

Can STPS1L30U replace a standard PN junction diode in an existing 24 V adapter design?

Yes - with direct substitution in SMB footprint, provided reverse voltage does not exceed 30 V and peak surge current stays within 75 A. Forward voltage reduction from ~0.7 V to 0.26 V lowers conduction loss by ~63%, improving efficiency and reducing thermal stress on adjacent components.

Is STPS1L30U suitable for synchronous rectification with a 100 kHz PWM controller?

Yes - its zero-recovery characteristic and low stored charge enable clean turn-off at 100 kHz. The device is explicitly qualified for parallel operation with MOSFETs in synchronous rectification, as confirmed in the product description and application note AN5088.

STPS1L30U Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: SMB

Operating Temperature - Junction:: 150°C (Max)

STPS1L30U FAQ

1.How can I place an order for STPS1L30U through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS1L30U 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 STPS1L30U reliable?

The price and inventory of STPS1L30U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1L30U is usually 5 days.

3.What payment methods are accepted for STPS1L30U?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1L30U transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS1L30U?

STPS1L30U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS1L30U 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 STPS1L30U?

For technical support, including STPS1L30U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1L30U requirements.

6.How does Aetrix verify that STPS1L30U is sourced from the original manufacturer or authorized distributors?

All STPS1L30U 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 STPS1L30U meets industry standards.

7.What is the process for return or replacement of STPS1L30U?

All STPS1L30U units undergo pre-shipment inspection (PSI). If there is an issue with STPS1L30U, 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 STPS1L30U part is unused and in its original packaging.

Return procedure for STPS1L30U:

1.Submit a request within 90 days.

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

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