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

STMicroelectronics STPS20L15G

Name: STPS20L15G
Brand: STMicroelectronics
SKU: STPS20L15G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS20L15G

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: STPS20L15G.pdf

Description:: DIODE SCHOTTKY 15V 20A D2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:3,807

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Product details

Overview

STPS20L15G from STMicroelectronics is a low-drop OR-ing Schottky diode in D²PAK package, rated for 20 A average forward current and 15 V repetitive peak reverse voltage, with typical forward voltage of 0.28 V at 19 A and 125 °C junction temperature. It is designed for fault-tolerant redundant power supply systems where rail isolation and minimal conduction loss are critical.

For engineers reviewing the STPS20L15G datasheet, STPS20L15G pinout, STPS20L15G application, or STPS20L15G equivalent, key selection criteria include forward voltage drop at high current/temperature, avalanche energy rating (970 W at 10 µs), thermal resistance (1.6 °C/W junction-to-case), and compliance with ECOPACK®2 environmental standards.

Technical Context

This device operates as a unidirectional power path controller in OR-ing configurations, enabling seamless switchover between parallel DC rails (e.g., 3 V, 5 V, 12 V) without reverse current flow. Its Schottky architecture eliminates minority-carrier storage delay, supporting fast transient response during rail failure events.

Rated for 125 °C maximum junction temperature and specified avalanche capability ensure robustness under surge and fault conditions. The D²PAK package provides low thermal resistance (1.6 °C/W) and mechanical stability for high-current PCB mounting with copper heatsinking.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	20 A average forward current at TC = 115 °C - supports continuous high-power rail combining without derating.
VRRM	15 V repetitive peak reverse voltage - compatible with 3 V, 5 V, and 12 V OR-ing applications.
VF (typ.)	0.28 V at IF = 19 A, Tj = 125 °C - reduces conduction loss to ~5.3 W, minimizing heatsink requirements.
IFSM	310 A non-repetitive surge current (tp = 10 ms) - withstands inrush and short-circuit transients.
PARM	970 W repetitive peak avalanche power (tp = 10 µs, Tj = 125 °C) - enables reliable operation during voltage overshoot events.
Rth(j-c)	1.6 °C/W junction-to-case thermal resistance - allows direct thermal coupling to heatsink or copper pour for stable thermal management.
IR (max)	500 µA reverse leakage at VR = 15 V, Tj = 100 °C - ensures low standby power loss in redundant supplies.

Pinout & Package

D²PAK package (TO-263) with 3 terminals: Anode, Cathode, and exposed metal tab (electrically connected to cathode). Designed for surface-mount assembly with thermal pad soldered to large copper area for heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Input power terminal	Connected to upstream power source; must be routed with low-inductance trace to minimize switching noise.
Cathode (Pin 2)	Output power terminal	Connected to load/rail; electrically tied to exposed tab for low-resistance return path and thermal conduction.
Exposed Tab	Cathode connection & thermal interface	Must be soldered to ≥10 cm² copper pour (FR4) to achieve Rth(j-a) ≤ 35 °C/W; no electrical isolation required.

Key Features

Feature	Design Value
Very low VF	0.28 V typ. at 19 A/125 °C - cuts conduction loss by >40% vs. standard Schottkys, reducing system thermal load.
Avalanche-rated	970 W peak power (10 µs) - sustains controlled energy dissipation during bus overvoltage without failure.
ECOPACK®2 compliant	Halogen-free, RoHS-compliant epoxy and lead finish - meets industrial and telecom environmental mandates.
D²PAK thermal performance	1.6 °C/W Rth(j-c) - enables compact layout with <10 mm² heatsink footprint for 20 A continuous operation.

Applications

Telecom Power Distribution

Industrial PLC Redundancy

Use Scenario: Dual 12 V DC inputs feeding backplane with automatic failover on primary supply loss.

IC Role / Device Role / Timing Role: OR-ing diode providing unidirectional power path and blocking reverse current during switchover.

Use Value: 0.28 V VF minimizes voltage drop across diode, preserving 11.72 V minimum rail voltage under full 20 A load.

Use Scenario: Hot-swap capable 24 V input module with dual power feeds for control logic and I/O banks.

IC Role / Device Role / Timing Role: Fault-isolating Schottky preventing backfeed from secondary supply into failed primary rail.

Use Value: 310 A IFSM rating handles inrush surges during hot-plug insertion without degradation.

Server Board OR-ing

Medical PSU Redundancy

Use Scenario: 5 V standby rail powered from two independent AC/DC converters in data center blade servers.

IC Role / Device Role / Timing Role: Low-loss power combiner ensuring uninterrupted operation during converter maintenance.

Use Value: 500 µA max IR at 100 °C prevents standby current leakage that could trigger false fault detection.

Use Scenario: Critical 3.3 V logic supply in patient-monitoring equipment with dual isolated DC/DC modules.

IC Role / Device Role / Timing Role: Safety-critical OR-ing element meeting IEC 60601-1 creepage/clearance and thermal reliability requirements.

Use Value: 125 °C Tj(max) and 1.6 °C/W Rth(j-c) support long-term operation in sealed enclosures without forced air cooling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar OR-ing Schottky diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NTS20101P5T3G	15 V VRRM, 20 A IF(AV), but VF = 0.35 V typ. at 20 A/125 °C; TO-252 package; Rth(j-c) = 2.5 °C/W.	Higher conduction loss (~7 W vs. 5.3 W); less effective thermal dissipation limits sustained 20 A use without larger heatsink.	Select when footprint compatibility with DPAK-3 is required and moderate thermal margin exists.
Vishay VS-20BQ015PBF	15 V VRRM, 20 A IF(AV), VF = 0.33 V typ. at 20 A/25 °C (degrades to ~0.42 V at 125 °C); TO-220AC package; Rth(j-c) = 2.0 °C/W.	Higher VF at elevated temperature increases power loss; through-hole mounting complicates automated SMT assembly.	Select for legacy through-hole designs where D²PAK rework is not feasible and thermal budget allows 1.5× conduction loss.

Compared with NTS20101P5T3G and VS-20BQ015PBF, STPS20L15G delivers the lowest VF at operating temperature and best thermal resistance, making it optimal for space-constrained, high-efficiency OR-ing where thermal headroom is limited.

Availability

STPS20L15G is available at Aetrix Electronics and suitable for telecom power distribution, industrial PLC redundancy, and server board OR-ing requiring stable component supply and long-lifecycle support.

Supply support for STPS20L15G 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

STPS20L15G belongs to ST's high-reliability power discrete portfolio, engineered specifically for fault-tolerant DC power architectures where low-loss, avalanche-robust OR-ing is mandatory.

FAQ

Is STPS20L15G suitable for 12 V automotive battery OR-ing?

No. Although rated for 15 V VRRM, STPS20L15G is not AEC-Q101 qualified and lacks automotive-grade screening, transient immunity, and extended temperature validation beyond 125 °C junction. It is intended for industrial and telecom power systems, not automotive environments.

What is the recommended PCB copper area for thermal performance?

Per Figure 9 in the datasheet, a minimum 10 cm² copper surface (FR4, 35 µm Cu) under the D²PAK tab achieves Rth(j-a) ≈ 35 °C/W. For 20 A continuous operation at ambient ≤ 60 °C, ≥15 cm² is recommended to maintain Tj ≤ 125 °C without forced airflow.

Does STPS20L15G require a gate driver or control circuit?

No. STPS20L15G is a passive Schottky diode with no control pins or bias requirements. It operates autonomously in OR-ing topology - forward conduction occurs when anode voltage exceeds cathode by >VF; no external drive or timing signals are needed.

Can STPS20L15G replace TO-220AC variant STPS20L15D in the same design?

Yes, electrically identical, but requires PCB footprint revision: D²PAK (STPS20L15G) uses surface-mount pads and thermal land, while TO-220AC (STPS20L15D) needs through-hole holes and screw-mount clearance. Thermal performance improves with D²PAK due to lower Rth(j-c) (1.6 vs. 2.0 °C/W).

STPS20L15G Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tube

Product Status:: Obsolete

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 15 V

Current - Average Rectified (Io):: 20A

Voltage - Forward (Vf) (Max) @ If:: 410 mV @ 19 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 6 mA @ 15 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

Operating Temperature - Junction:: 125°C (Max)

STPS20L15G FAQ

1.How can I place an order for STPS20L15G through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS20L15G 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 STPS20L15G reliable?

The price and inventory of STPS20L15G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20L15G is usually 5 days.

3.What payment methods are accepted for STPS20L15G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20L15G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS20L15G?

STPS20L15G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS20L15G 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 STPS20L15G?

For technical support, including STPS20L15G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20L15G requirements.

6.How does Aetrix verify that STPS20L15G is sourced from the original manufacturer or authorized distributors?

All STPS20L15G 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 STPS20L15G meets industry standards.

7.What is the process for return or replacement of STPS20L15G?

All STPS20L15G units undergo pre-shipment inspection (PSI). If there is an issue with STPS20L15G, 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 STPS20L15G part is unused and in its original packaging.

Return procedure for STPS20L15G:

1.Submit a request within 90 days.

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

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