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

STMicroelectronics STPS20M60SR

Name: STPS20M60SR
Brand: STMicroelectronics
SKU: STPS20M60SR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS20M60SR

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-262-3 Long Leads, I2PAK, TO-262AA

Datasheet:: STPS20M60SR.pdf

Description:: DIODE SCHOTTKY 60V 20A I2PAK

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Product details

Overview

STPS20M60SR from STMicroelectronics is a single silicon Schottky power rectifier in I2PAK package, rated for 20 A average forward current and 60 V repetitive peak reverse voltage, with typical forward voltage drop of 0.365 V at 125 °C and 20 A. It is avalanche-rated (80 V, 1 µs), thermally optimized (R_th(j-c) = 1.0 °C/W), and designed for high-frequency SMPS in notebook/desktop adapters.

For engineers reviewing the STPS20M60SR datasheet, STPS20M60SR pinout, STPS20M60SR application, or STPS20M60SR equivalent, this diode supports conduction-loss-sensitive designs requiring low VF, robust surge handling (600 A IFSM), and thermal stability up to 150 °C junction temperature in compact surface-mount-compatible through-hole packages.

Technical Context

This Schottky rectifier operates without minority-carrier storage delay, enabling true high-frequency switching (no reverse recovery charge) in AC/DC and DC/DC converters. Its low VF and high IF(AV) rating directly reduce conduction losses, while its avalanche capability (26.4 kW PARM, 80 V VARM) allows safe operation under transient overvoltage conditions without external clamping.

The device's thermal design centers on low junction-to-case resistance (1.0 °C/W), enabling efficient heat transfer to PCB copper or heatsinks. Its I2PAK package provides mechanical robustness and thermal performance comparable to TO-220AB but with improved mounting reliability and lower profile for space-constrained adapter designs.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	20 A - Sustains continuous forward current at Tc = 135 °C, suitable for primary-side rectification in 65–100 W adapters
VRRM	60 V - Maximum repetitive reverse voltage; defines safe operating margin above nominal output voltage rails
VF (typ)	0.365 V @ 20 A, 125 °C - Low conduction loss enables >92% efficiency at light-to-full load in 19 V output adapters
IFSM	600 A @ 10 ms sine - Withstands inrush and short-circuit surges without failure in unregulated input stages
Rth(j-c)	1.0 °C/W - Enables direct thermal coupling to heatsink or copper pour; limits ΔTj to 20 °C at 20 W dissipation
Tj(max)	150 °C - Maximum junction temperature; sets thermal derating boundary for long-term reliability under sustained load
VARM	80 V @ tp < 1 µs - Avalanche energy rating ensures survivability during fast transients without external TVS

Pinout & Package

STPS20M60SR uses the I2PAK (TO-263) package: a surface-mount-compatible, isolated-tab through-hole variant with three terminals. The case is electrically isolated from the cathode, allowing direct heatsinking without insulation washers.

Pin/Terminal	Circuit Role	Design Meaning
Terminal 1 (Anode)	Input current entry point	Connected to transformer secondary or switching node; carries full forward current path
Terminal 2 (Cathode)	Output current exit point	Connected to output capacitor and load; low-VF path minimizes voltage sag under dynamic load
Terminal 3 (Isolated Tab)	Thermal interface only	Electrically isolated metal tab for heatsink attachment; no electrical connection to anode or cathode

Key Features

Feature	Design Value
Avalanche-rated operation	Withstands 80 V, 1 µs transient pulses without degradation-eliminates need for external clamping in cost-sensitive adapters
Low forward voltage	0.365 V typ. @ 20 A / 125 °C reduces conduction loss by ~35% vs. standard silicon diodes, improving thermal headroom
High-frequency suitability	No reverse recovery charge (Qrr = 0) enables clean switching in >300 kHz SMPS designs without snubbers or ringing
Thermally optimized package	I2PAK delivers 1.0 °C/W Rth(j-c), matching TO-220AB performance while offering better PCB assembly repeatability
Robust surge handling	600 A non-repetitive forward surge rating supports reliable startup and fault tolerance in universal-input AC/DC supplies

Applications

Notebook Power Adapters

Desktop PC Power Supplies

Use Scenario: 19 V, 3–6 A output stage in ultra-thin notebook adapters with strict thermal and efficiency targets.

IC Role / Device Role / Timing Role: Primary-output synchronous rectifier replacement; conducts DC output current with minimal voltage drop.

Use Value: Reduces conduction loss by 1.2 W vs. legacy Si diode at 4 A, lowering heatsink size and enabling fanless operation.

Use Scenario: +12 V rail rectification in ATX PSUs where space and thermal density constrain component selection.

IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in LLC resonant converter output stage.

Use Value: Eliminates reverse recovery loss, reducing EMI and enabling stable operation at 250–400 kHz switching frequencies.

Game Console Power Adapters

USB-C PD Reference Designs

Use Scenario: 20 V, 5 A output in compact game station adapters subject to rapid load transients and ambient temperatures up to 50 °C.

IC Role / Device Role / Timing Role: Main output rectifier handling pulsed 10–20 A peaks during GPU-intensive workloads.

Use Value: Avalanche rating absorbs line-induced spikes during hot-plug events, preventing catastrophic failure without added protection circuitry.

Use Scenario: 20 V/3 A fixed-output stage in USB-C PD 3.0 reference adapters targeting UL62368-1 compliance.

IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology with tight thermal budget on 4-layer PCB.

Use Value: I2PAK package enables direct thermal coupling to 40 mm² internal copper pour, limiting ΔTj to <18 °C at full load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-20CPH06	Same 20 A/60 V rating; VF = 0.52 V @ 20 A/125 °C; Rth(j-c) = 1.25 °C/W; TO-220AC package	Larger thermal resistance requires larger heatsink; less suitable for ultra-thin adapters	Select when TO-220AC mounting is standardized and higher VF is acceptable for cost-driven designs
ON Semiconductor MBR2060CT	Dual common-cathode configuration; VF = 0.72 V @ 10 A/125 °C per diode; TO-220AB package	Not single-diode; higher VF increases conduction loss; dual layout adds routing complexity	Choose only if dual-diode topology is required for center-tapped transformer designs

Compared with VS-20CPH06 and MBR2060CT, STPS20M60SR delivers superior thermal efficiency (1.0 °C/W), lower VF (0.365 V), and I2PAK mounting flexibility-making it optimal for space- and thermally constrained single-output adapters where conduction loss dominates system efficiency.

Availability

STPS20M60SR is available at Aetrix Electronics and suitable for notebook adapters, desktop PC power supplies, game console chargers, and USB-C PD reference designs requiring stable component supply and consistent thermal performance across production batches.

Supply support for STPS20M60SR 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.

The STPS series targets high-efficiency power conversion, with STPS20M60SR specifically engineered for compact, high-frequency AC/DC adapters where low VF, avalanche ruggedness, and thermal reliability are critical.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPS20M60SR is rated for IF(AV) = 20 A at Tc = 135 °C. Exceeding this case temperature reduces allowable current per Figure 3; sustained operation above 135 °C risks thermal runaway due to positive temperature coefficient of VF. Derating is mandatory beyond this point.

Can STPS20M60SR replace a standard PN-junction rectifier in an existing 60 W adapter?

Yes-provided layout accommodates I2PAK footprint and thermal interface. Its zero Qrr eliminates snubber networks, and 0.365 V VF lowers conduction loss by ~1.4 W vs. a typical 1N5408 at 4 A, improving efficiency and reducing heatsink requirements.

Is the isolated tab electrically connected to any internal node?

No-the tab is fully electrically isolated from both anode and cathode. It serves only as a thermal interface. ST confirms isolation via dielectric testing per ECOPACK® specifications; no external insulator is needed for heatsink mounting.

How does the avalanche rating impact system-level reliability?

The 80 V VARM rating (tp < 1 µs) allows the diode to absorb transient energy without failure during line surges or transformer leakage spikes. This avoids reliance on external TVS devices, reducing BOM count and board area while maintaining UL/IEC surge immunity compliance.

STPS20M60SR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-262-3 Long Leads, I2PAK, TO-262AA

Packaging:: Tube

Product Status:: Obsolete

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 60 V

Current - Average Rectified (Io):: 20A

Voltage - Forward (Vf) (Max) @ If:: 565 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 125 µA @ 60 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: I2PAK

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

STPS20M60SR FAQ

1.How can I place an order for STPS20M60SR through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS20M60SR 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 STPS20M60SR reliable?

The price and inventory of STPS20M60SR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20M60SR is usually 5 days.

3.What payment methods are accepted for STPS20M60SR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20M60SR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS20M60SR?

STPS20M60SR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS20M60SR 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 STPS20M60SR?

For technical support, including STPS20M60SR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20M60SR requirements.

6.How does Aetrix verify that STPS20M60SR is sourced from the original manufacturer or authorized distributors?

All STPS20M60SR 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 STPS20M60SR meets industry standards.

7.What is the process for return or replacement of STPS20M60SR?

All STPS20M60SR units undergo pre-shipment inspection (PSI). If there is an issue with STPS20M60SR, 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 STPS20M60SR part is unused and in its original packaging.

Return procedure for STPS20M60SR:

1.Submit a request within 90 days.

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

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