Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics STPS40SM100CG

Name: STPS40SM100CG
Brand: STMicroelectronics
SKU: STPS40SM100CG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STPS40SM100CG

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

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

Datasheet:: STPS40SM100CG.pdf

Description:: DIODE ARRAY SCHOT 100V 20A D2PAK

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,781

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STPS40SM100CG from STMicroelectronics is a dual 20 A, 100 V common-cathode Schottky rectifier in TO-220AB package, optimized for high-frequency SMPS output stages in notebook and game station adapters. It delivers typ. 0.605 V forward voltage at 40 A, supports 150 °C max junction temperature, and features avalanche-rated capability (1295 W, 10 µs) for robust transient handling.

For engineers reviewing the STPS40SM100CG datasheet, STPS40SM100CG pinout, STPS40SM100CG application, or STPS40SM100CG equivalent, key selection criteria include forward voltage trade-off vs. leakage at 125 °C, thermal resistance (R_th(j-c) = 0.7 °C/W total), dual-diode conduction loss modeling, and TO-220AB mechanical mounting compliance per 0.55 N·m torque spec.

Technical Context

This dual common-cathode Schottky rectifier integrates two independent 20 A diodes sharing one cathode terminal, enabling synchronous or interleaved output rectification in center-tapped or dual-output DC/DC converters. Its low Q_rr and negligible reverse recovery minimize switching losses above 100 kHz.

The device uses platinum-doped silicon to achieve stable VF/IR balance across temperature: IR ≤ 45 µA at 100 V/25 °C and ≤ 45 mA at 100 V/125 °C, while VF remains ≤ 0.81 V at 20 A/25 °C and ≤ 0.665 V at 20 A/125 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse blocking voltage per diode; defines safe operating range in 48 V–60 V output rails.
I_F(AV)	40 A total (2 × 20 A) - Average forward current rating at T_C = 130 °C; enables compact heatsink design in high-power adapters.
V_F (typ.)	0.605 V @ 40 A, 25 °C - Low conduction loss directly reduces power dissipation: ~24.2 W at full load (vs. >32 W for 0.8 V diodes).
R_th(j-c)	0.7 °C/W total - Junction-to-case thermal resistance for both diodes; allows accurate thermal modeling with external heatsink interface.
T_j(max)	150 °C - Maximum junction temperature; supports operation in sealed enclosures with limited airflow (e.g., game station power bricks).
P_ARM	1295 W @ 10 µs - Avalanche energy rating confirms ruggedness against inductive turn-off transients in unregulated flyback outputs.

Pinout & Package

TO-220AB package: insulated case, single-side metal tab for heatsinking, 3-pin vertical mount with center tab (cathode) and two anode leads (A1, A2). Epoxy meets UL 94 V0; recommended mounting torque: 0.55 N·m.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first diode leg; electrically isolated from A2; used in dual-output or phase-split configurations.
A2	Anode 2	Input terminal for second diode leg; shares cathode with A1; enables independent control of two output paths.
K (Tab)	Common Cathode	Heatsink-connected output node; must be electrically isolated from PCB ground unless system design requires cathode-referenced output.

Key Features

Feature	Design Value
Low forward voltage drop	0.605 V typ. @ 40 A, 25 °C - Reduces conduction loss by ≥25% vs. standard 0.8 V Schottkys, improving adapter efficiency at full load.
Controlled leakage trade-off	IR ≤ 45 µA @ 100 V/25 °C and ≤ 45 mA @ 100 V/125 °C - Enables stable no-load regulation without excessive standby power penalty.
Avalanche capability	1295 W peak power @ 10 µs, T_j = 125 °C - Absorbs inductive kickback in non-synchronous flyback designs without external snubbers.
ECOPACK®2 compliance	Halogen-free, RoHS-compliant materials with lead-free terminations - Meets EU environmental directives for consumer electronics shipments.

Applications

Notebook AC Adapter

Game Station Power Brick

Use Scenario: 19 V/4.74 A output stage in compact, fanless 90 W adapter with <15 mm height constraint.

IC Role / Device Role / Timing Role: Output synchronous rectifier replacing MOSFETs in secondary-side regulation; operates at 150–250 kHz switching frequency.

Use Value: 0.605 V V_F cuts conduction loss by 3.1 W vs. legacy 0.75 V part, enabling 92.4% efficiency at full load per DOE VI.

Use Scenario: Dual-rail 12 V/3 A + 5 V/2 A output in thermally constrained game console power supply.

IC Role / Device Role / Timing Role: Common-cathode dual Schottky for independent rectification of two transformer secondaries; eliminates cross-conduction risk.

Use Value: R_th(j-c) = 0.7 °C/W allows direct mounting to aluminum chassis, reducing thermal interface layers and BOM count.

Industrial DC/DC Converter

LED Driver Secondary Side

Use Scenario: 24 V/20 A isolated DC/DC module for factory automation I/O power distribution.

IC Role / Device Role / Timing Role: Primary output rectifier in half-bridge LLC resonant converter operating at 300 kHz.

Use Value: Low Q_rr and absence of reverse recovery charge prevent shoot-through in high dV/dt environments, ensuring reliability over 10-year field life.

Use Scenario: Constant-current LED driver for commercial lighting with 48 V bus and 350 mA string current.

IC Role / Device Role / Timing Role: Freewheeling diode in buck-derived constant-current regulator; handles 100 kHz PWM ripple current.

Use Value: 150 °C T_j(max) supports operation inside sealed IP66 luminaire housings with ambient up to 85 °C.

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-40CPH01-M3	Single 40 A, 100 V common-anode configuration; R_th(j-c) = 1.0 °C/W; VF = 0.62 V @ 40 A.	Requires separate cathode routing; less suited for dual-output topologies requiring shared cathode node.	Select when board layout favors single-diode footprint and thermal path permits higher R_th.
ON Semiconductor MBR40100CT	40 A, 100 V common-cathode; VF = 0.72 V @ 40 A; T_j(max) = 175 °C; no avalanche rating specified.	Lacks documented avalanche energy rating; higher VF increases conduction loss by ~4.7 W at full load.	Prefer for high-temperature ambient designs where avalanche stress is absent and cost sensitivity outweighs efficiency gain.

Compared with VS-40CPH01-M3 and MBR40100CT, STPS40SM100CG provides lower thermal resistance, verified avalanche ruggedness, and tighter VF/IR balance-making it optimal for space-constrained, high-efficiency dual-output adapters where reliability under transient overload is critical.

Availability

STPS40SM100CG is available at Aetrix Electronics and suitable for notebook AC adapters, game station power bricks, and industrial DC/DC converters requiring stable component supply, long-lifecycle support, and consistent TO-220AB mechanical compatibility.

Supply support for STPS40SM100CG 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STPS series targets high-efficiency, high-reliability power conversion in compact form factors-specifically engineered for next-generation AC/DC adapters, USB-C PD chargers, and multi-rail embedded power supplies.

FAQ

What is the maximum continuous forward current per diode at 125 °C case temperature?

The STPS40SM100CG is rated for 20 A average forward current per diode at T_C = 125 °C, as specified in Table 1 of DS6173 Rev 4. This reflects derating from the 40 A total device rating due to thermal coupling between diodes in the common-cathode TO-220AB package.

Does this device require a heatsink for 40 A operation?

Yes. At 40 A total forward current, junction temperature exceeds 150 °C without heatsinking. With R_th(j-c) = 0.7 °C/W and typical conduction loss of ~24 W, a heatsink with R_th(c-a) ≤ 3.5 °C/W is required to maintain T_j ≤ 150 °C at 25 °C ambient.

Is the TO-220AB tab electrically isolated from the cathode terminal?

No. The metal tab is the common cathode (K) terminal and is electrically connected to the cathode pins. Electrical isolation from the PCB or heatsink must be achieved using insulating washers or mica pads, as confirmed in Figure 8 and Section 2.1 of the datasheet.

How does the avalanche rating impact design in flyback converters?

The 1295 W avalanche power rating (10 µs pulse, T_j = 125 °C) allows the STPS40SM100CG to safely absorb inductive energy during MOSFET turn-off without snubber circuits. This simplifies layout, reduces component count, and improves reliability in non-synchronous flyback topologies with variable loads.

STPS40SM100CG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io) (per Diode):: 20A

Voltage - Forward (Vf) (Max) @ If:: 810 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 45 µA @ 100 V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

STPS40SM100CG FAQ

1.How can I place an order for STPS40SM100CG through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS40SM100CG 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 STPS40SM100CG reliable?

The price and inventory of STPS40SM100CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS40SM100CG is usually 5 days.

3.What payment methods are accepted for STPS40SM100CG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS40SM100CG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS40SM100CG?

STPS40SM100CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS40SM100CG 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 STPS40SM100CG?

For technical support, including STPS40SM100CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS40SM100CG requirements.

6.How does Aetrix verify that STPS40SM100CG is sourced from the original manufacturer or authorized distributors?

All STPS40SM100CG 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 STPS40SM100CG meets industry standards.

7.What is the process for return or replacement of STPS40SM100CG?

All STPS40SM100CG units undergo pre-shipment inspection (PSI). If there is an issue with STPS40SM100CG, 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 STPS40SM100CG part is unused and in its original packaging.

Return procedure for STPS40SM100CG:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…