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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

STMicroelectronics STPS20M80CT

Name: STPS20M80CT
Brand: STMicroelectronics
SKU: STPS20M80CT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS20M80CT

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: STPS20M80CT.pdf

Description:: DIODE ARRAY SCHOT 80V 10A TO-220

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Product details

Overview

STPS20M80CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 80 V repetitive peak reverse voltage and 2 × 10 A average forward current per diode at T_c = 160 °C. It delivers typ. 0.490 V forward voltage at 10 A and 125 °C, with 2.0 °C/W junction-to-case thermal resistance per diode, enabling high-efficiency operation in notebook and LCD TV adapters.

For engineers reviewing the STPS20M80CT datasheet, STPS20M80CT pinout, STPS20M80CT application, or STPS20M80CT equivalent, this device requires attention to its insulated thermal path, avalanche-rated surge capability (220 A non-repetitive), low leakage (<30 µA @ 25 °C), and dual-diode parallel conduction behavior in SMPS secondary-side rectification.

Technical Context

This dual Schottky rectifier integrates two independent anode terminals (A1, A2) sharing a common cathode (K), enabling synchronous or interleaved output rectification in center-tapped or dual-output DC/DC converters. Its optimized metal–semiconductor junction achieves <0.53 V VF at 10 A/125 °C while maintaining IR <6.2 mA at 125 °C/VRRM.

The TO-220AB package provides direct case-to-heatsink conduction (R_th(j-c) = 2.0 °C/W per diode), and the device is qualified for T_j(max) = 175 °C with specified avalanche energy handling (6700 W peak, 1 µs pulse) - critical for transient overvoltage robustness in unregulated flyback or LLC resonant topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	80 V - maximum reverse blocking voltage per diode; defines safe operating margin against reflected spikes in 5–24 V output SMPS.
I_F(AV)	2 × 10 A - continuous average forward current per diode at T_c = 160 °C; supports 20 A total DC output with shared heatsink.
V_F (typ)	0.490 V @ 10 A, 125 °C - low conduction loss enables >92% efficiency in 19 V/4.74 A laptop adapter designs.
R_th(j-c)	2.0 °C/W per diode - enables thermal design with ≤20 °C temperature rise at 10 A conduction, simplifying heatsink selection.
I_FSM	220 A @ 10 ms - withstands inrush and short-circuit surges without failure, reducing need for external current limiting.
T_j(max)	175 °C - extended junction rating allows operation in compact, thermally constrained enclosures like game station power supplies.
C_j	45 pF - low junction capacitance minimizes switching losses and EMI in >100 kHz SMPS designs.

Pinout & Package

TO-220AB package with isolated mounting tab (electrically connected to cathode K); mechanical mounting via M3 screw (0.4–0.6 N·m torque). Tab serves as primary heat path and common cathode terminal.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first diode leg; connects to transformer secondary winding or switch node in dual-output configuration.
A2	Anode 2	Input terminal for second diode leg; enables independent current sourcing from separate windings or phases.
K	Common Cathode	Shared output node; ties both diodes to DC output rail and heatsink; must be electrically isolated from chassis if using insulated tab.

Key Features

Feature	Design Value
Dual common-cathode topology	Enables space-efficient dual-output rectification without discrete cathode tie, reducing PCB trace inductance and layout complexity.
Avalanche-rated surge capability	6700 W peak avalanche power (1 µs) ensures reliability during output short-circuit or no-load transients without external clamping.
Low forward voltage at high temperature	0.490 V @ 10 A/125 °C maintains conduction efficiency even under sustained thermal stress in sealed adapters.
Insulated package option (TO-220FPAB variant)	2000 V isolation between tab and leads eliminates need for insulating washers in high-voltage secondary-side mounting.
ECOPACK® compliant packaging	Meets UL94 V0 flammability standard and RoHS/REACH requirements for consumer electronics compliance.

Applications

Notebook Adapter

LCD TV Power Supply

Use Scenario: 19 V / 4.74 A AC-DC adapter with active PFC and quasi-resonant flyback.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacing MOSFETs; conducts during transformer demagnetization phase.

Use Value: Reduces conduction loss by 40% vs. Si diode, lowering thermal load on compact aluminum heatsink and enabling 15 mm height constraint.

Use Scenario: 24 V / 8 A main rail in 32-inch LCD TV power board with dual outputs.

IC Role / Device Role / Timing Role: Dual-leg rectifier for center-tapped transformer secondary; each diode handles one half-cycle.

Use Value: Enables 93.5% full-load efficiency at 100 kHz switching frequency, meeting Energy Star 6.0 standby and active mode requirements.

Game Station PSU

Desktop PC ATX +12 V Rail

Use Scenario: Compact 12 V / 25 A regulated supply for gaming console with tight thermal envelope.

IC Role / Device Role / Timing Role: Primary output rectifier in LLC resonant converter; operates in ZVS region with low di/dt stress.

Use Value: 0.53 V VF at 125 °C prevents thermal runaway under 40°C ambient + 30°C internal rise, eliminating need for forced air cooling.

Use Scenario: +12 V secondary rectification in multi-rail ATX v2.4 PSU with 30 A output requirement.

IC Role / Device Role / Timing Role: Dual-diode parallel configuration delivering 2 × 15 A; shares current with minimal imbalance (<5%) due to matched die characteristics.

Use Value: Achieves <1.2 W total conduction loss at full load, reducing heatsink mass by 35% versus discrete 15 A Schottky pair.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS20L80CT	Lower V_RRM (80 V same), but lower I_F(AV) (2 × 8 A @ T_c = 160 °C); VF = 0.51 V @ 10 A/125 °C.	Suitable only for ≤16 A total output; less margin for transient overload in high-power adapters.	Select when cost sensitivity outweighs 2 A per diode headroom and thermal derating is tightly controlled.
MBR2080CT	Same V_RRM/I_F(AV), but higher VF (0.74 V @ 10 A/25 °C); R_th(j-c) = 2.5 °C/W; no avalanche rating.	Lacks specified avalanche robustness; requires external TVS for surge protection in unregulated topologies.	Choose only for cost-driven, low-transient industrial applications where thermal margin exceeds 25 °C.

Compared with STPS20L80CT and MBR2080CT, STPS20M80CT offers superior thermal performance (2.0 vs. ≥2.5 °C/W), verified avalanche capability (6700 W), and lower VF at elevated temperature - making it the preferred choice for thermally constrained, high-reliability consumer power supplies.

Availability

STPS20M80CT is available at Aetrix Electronics and suitable for notebook adapters, LCD TV power supplies, and game station PSUs requiring stable component supply, consistent thermal performance, and certified avalanche ruggedness.

Supply support for STPS20M80CT 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The STPS20M80CT belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency SMPS secondary-side rectification where low VF, high T_j, and avalanche resilience are mandatory.

FAQ

What is the thermal resistance from junction to case per diode?

The STPS20M80CT has a measured R_th(j-c) of 2.0 °C/W per diode in TO-220AB package, confirmed in Table 3 of the official datasheet (Doc ID 018724 Rev 1). This value applies when the tab is mounted to a heatsink with proper thermal interface material and 0.4–0.6 N·m screw torque.

Does STPS20M80CT support avalanche operation, and what is its rated energy?

Yes - STPS20M80CT is fully specified for repetitive avalanche operation: P_ARM = 6700 W at T_j = 25 °C, t_p = 1 µs (Table 2), with V_ARM = 100 V and I_AR < 20.1 A. This is validated per AN1768 and AN2025 application notes for surge immunity in flyback and LLC converters.

Can STPS20M80CT be used in parallel with another unit for higher current?

No - the datasheet does not recommend paralleling multiple STPS20M80CT units. Each device contains two monolithically integrated diodes sharing a common cathode; paralleling entire packages introduces thermal imbalance and current-sharing instability due to VF mismatch and differing R_th paths.

What is the reverse leakage current at maximum operating temperature?

At T_j = 125 °C and V_R = V_RRM = 80 V, the maximum reverse leakage current is 20 mA per diode (Table 4). This value is critical for standby power budgeting in Energy Star-compliant adapters, where total system leakage must remain below 100 mW.

STPS20M80CT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 80 V

Current - Average Rectified (Io) (per Diode):: 10A

Voltage - Forward (Vf) (Max) @ If:: 740 mV @ 10 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 30 µA @ 80 V

Operating Temperature - Junction:: 175°C (Max)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STPS20M80CT FAQ

1.How can I place an order for STPS20M80CT through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS20M80CT 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 STPS20M80CT reliable?

The price and inventory of STPS20M80CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20M80CT is usually 5 days.

3.What payment methods are accepted for STPS20M80CT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20M80CT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS20M80CT?

STPS20M80CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS20M80CT 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 STPS20M80CT?

For technical support, including STPS20M80CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20M80CT requirements.

6.How does Aetrix verify that STPS20M80CT is sourced from the original manufacturer or authorized distributors?

All STPS20M80CT 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 STPS20M80CT meets industry standards.

7.What is the process for return or replacement of STPS20M80CT?

All STPS20M80CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS20M80CT, 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 STPS20M80CT part is unused and in its original packaging.

Return procedure for STPS20M80CT:

1.Submit a request within 90 days.

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

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