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

STMicroelectronics STPS20L15G-TR

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

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Part No.:: STPS20L15G-TR

Manufacturer:: STMicroelectronics

Category:: Single Diodes

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

Datasheet:: STPS20L15G-TR.pdf

Description:: DIODE SCHOTTKY 15V 20A D2PAK

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Product details

Overview

STPS20L15G-TR from STMicroelectronics is a low-drop OR-ing Schottky diode in D²PAK package, rated for 20 A average forward current, 15 V repetitive peak reverse voltage, and 0.28 V typical forward voltage at 19 A and 125 °C. It features avalanche capability (970 W at 10 µs), junction-to-case thermal resistance of 1.6 °C/W, and is designed for fault-tolerant 3 V/5 V/12 V rail OR-ing in redundant power supplies.

For engineers reviewing the STPS20L15G-TR datasheet, STPS20L15G-TR pinout, STPS20L15G-TR application, or STPS20L15G-TR equivalent, key selection criteria include forward voltage drop at high temperature, avalanche energy rating, thermal resistance under conduction cooling, and D²PAK mounting compatibility with FR4 PCB copper area.

Technical Context

This device operates as a unidirectional power path selector in redundant DC power architectures, where two or more supplies feed a common load via discrete OR-ing diodes to prevent backfeed and enable seamless failover. Its Schottky structure eliminates minority-carrier storage delay, enabling fast turn-off during supply loss events.

Thermal design relies on case-to-heatsink conduction: the D²PAK tab serves as both electrical cathode terminal and primary thermal interface, requiring controlled torque (0.55 N·m recommended) and ≥8.1 cm² copper surface for R_th(j-a) ≤ 35 °C/W per Figure 9. Avalanche rating supports transient overvoltage survival without clamping circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	15 V - Supports OR-ing of 3 V, 5 V, and 12 V rails with margin against ripple and transients
I_F(AV)	20 A at T_C = 115 °C - Sustains continuous load current with standard heatsinking
V_F (typ.)	0.28 V at I_F = 19 A, T_j = 125 °C - Minimizes conduction loss (≈5.3 W) and heatsink size
R_th(j-c)	1.6 °C/W - Enables direct thermal coupling to heatsink; requires mechanical mounting per spec
P_ARM	970 W at t_p = 10 µs, T_j = 125 °C - Withstands single-event avalanche stress without failure
I_R	≤500 µA at V_R = 15 V, T_j = 100 °C - Low leakage preserves efficiency in standby and hot-swap scenarios

Pinout & Package

D²PAK (TO-263) package with isolated tab: single cathode terminal on tab, anode on lead frame. Requires soldered tab connection for thermal and electrical performance.

Pin/Terminal	Circuit Role	Design Meaning
Tab (exposed metal)	Cathode	Primary thermal path and high-current return node; must be electrically connected to system ground or negative rail
Lead 1 (left)	Anode	Input power source connection; carries full forward current into load
Lead 2 (right)	No Connect	Internal die isolation; not bonded; must remain unconnected and un-soldered

Key Features

Feature	Design Value
Low V_F at high T_j	0.28 V typ. at 125 °C enables <5.5 W conduction loss at 20 A, reducing heatsink mass by >40% vs. standard Schottkys
Avalanche-rated operation	970 W peak power survivability at 10 µs allows use without external TVS in 12 V rail OR-ing with inductive load switching
ECOPACK®2 compliance	Halogen-free, RoHS-compliant epoxy meets UL 94 V0; suitable for industrial and telecom equipment certifications
Conduction-cooled thermal design	1.6 °C/W R_th(j-c) supports direct mounting to aluminum heatsink with thermal interface material, eliminating forced-air dependency

Applications

Telecom Power Shelf OR-ing

Industrial PLC Redundant PSU

Use Scenario: Dual 12 V hot-swap power modules feeding shared backplane bus with automatic switchover on failure.

IC Role / Device Role / Timing Role: Unidirectional power path controller; blocks reverse current while conducting forward load current with minimal voltage drop.

Use Value: Prevents cross-conduction between supplies and maintains <0.3 V rail drop during 20 A load, avoiding brownout on downstream logic.

Use Scenario: Dual 5 V DC inputs powering I/O modules in programmable logic controllers with zero-downtime redundancy.

IC Role / Device Role / Timing Role: Fault-isolating OR-ing element; conducts only when upstream voltage exceeds load rail by >0.3 V.

Use Value: Enables sub-100 µs failover without software intervention and eliminates need for active MOSFET controllers in cost-sensitive designs.

Server Midplane Power Distribution

Medical Diagnostic Equipment Backup Supply

Use Scenario: Parallel 3.3 V and 5 V outputs from separate AC/DC converters feeding midplane with shared load sharing.

IC Role / Device Role / Timing Role: Passive rail selector; prevents backfeed from higher-voltage rail into lower-voltage rail during startup sequencing.

Use Value: Eliminates sequencing complexity and ensures stable 3.3 V rail even if 5 V converter starts first, using inherent V_F offset.

Use Scenario: Battery-backed 12 V auxiliary supply OR-ed with main AC/DC output in MRI subsystems requiring uninterrupted operation.

IC Role / Device Role / Timing Role: Seamless transition switch; conducts from battery only when main supply drops below 11.5 V.

Use Value: Sustains critical timing circuits for >200 ms during AC loss, leveraging low V_F to minimize battery drain at 15 A peak.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS20L15D	Same die in TO-220AC package; R_th(j-c) = 1.6 °C/W but higher R_th(j-a) due to smaller tab area and no surface-mount footprint	Preferred for prototyping or low-volume through-hole assembly; unsuitable for automated SMT lines	Select when manual assembly or heatsink bolt-down is required; avoid for high-density PCB layouts
Vishay VSKT2015	20 A/15 V Schottky in D²PAK; V_F = 0.32 V typ. at 19 A/125 °C; no specified avalanche rating	Lacks documented avalanche capability; requires external TVS for surge-prone 12 V systems	Acceptable for non-critical 5 V OR-ing where transient immunity is managed externally

Compared with STPS20L15G-TR, STPS20L15D offers identical electrical specs but inferior thermal integration in SMT volume production, while VSKT2015 trades 0.04 V higher V_F and missing avalanche rating for second-source availability in non-mission-critical applications.

Availability

STPS20L15G-TR is available at Aetrix Electronics and suitable for telecom power shelf OR-ing, industrial PLC redundant PSU, and medical diagnostic equipment backup supply requiring stable component supply across multi-year production cycles.

Supply support for STPS20L15G-TR 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STPS series targets high-efficiency, high-reliability power path management in redundant DC systems, with emphasis on low-loss Schottky technology optimized for conduction-cooled thermal environments.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum operating junction temperature is 125 °C, as defined in Table 2. Operation above this limit risks thermal runaway due to positive temperature coefficient of forward voltage. Derating is required above 115 °C case temperature per the IF(AV) specification.

Can STPS20L15G-TR be used without a heatsink in free-air conditions?

No. With R_th(j-a) exceeding 60 °C/W in free air (per Figure 9), even 5 A load would exceed 125 °C junction temperature. Minimum 8.1 cm² copper area on FR4 is required for R_th(j-a) ≤ 35 °C/W; active heatsinking is mandatory for 20 A operation.

Is the D²PAK tab electrically isolated from the leads?

No. The exposed tab is the cathode terminal and is electrically connected to the internal die cathode. It must be tied to the same potential as the cathode net-typically system ground or negative rail-and cannot be floated or insulated without breaking the circuit path.

Does STPS20L15G-TR support bidirectional current flow?

No. It is a unidirectional Schottky diode. Forward conduction occurs only from anode to cathode (lead to tab). Reverse current is blocked up to 15 V, and avalanche breakdown is non-destructive only for single-pulse events within the specified P_ARM limit.

STPS20L15G-TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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-TR FAQ

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

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

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

3.What payment methods are accepted for STPS20L15G-TR?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS20L15G-TR?

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

Once your STPS20L15G-TR 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-TR?

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

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

All STPS20L15G-TR 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-TR meets industry standards.

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

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

Return procedure for STPS20L15G-TR:

1.Submit a request within 90 days.

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

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