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

STMicroelectronics STPS20M100SR

Name: STPS20M100SR
Brand: STMicroelectronics
SKU: STPS20M100SR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS20M100SR

Manufacturer:: STMicroelectronics

Category:: Single Diodes

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

Datasheet:: STPS20M100SR.pdf

Description:: DIODE SCHOTTKY 100V 20A I2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:291

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Product details

Overview

STPS20M100SR from STMicroelectronics is a 100 V, 20 A single Schottky rectifier in I²PAK package, designed for high-frequency switch-mode power supplies. It delivers low forward voltage drop (0.61 V typ. at 20 A, 125 °C), avalanche-rated operation, and maximum junction temperature of +150 °C - enabling high-efficiency DC/DC conversion in notebook and game station adapters.

For engineers reviewing the STPS20M100SR datasheet, STPS20M100SR pinout, STPS20M100SR application, or STPS20M100SR equivalent, key selection criteria include forward voltage vs. load current, thermal resistance (R_th(j-c) = 1.2 °C/W), reverse leakage at elevated temperature, and insulated package suitability for isolated topologies.

Technical Context

This Schottky rectifier operates without minority-carrier storage delay, supporting high-frequency switching up to several hundred kHz in SMPS designs. Its low VF minimizes conduction losses, while avalanche rating (1150 W peak at 10 µs) enables robust transient handling in unregulated input stages.

The I²PAK package provides 1.2 °C/W junction-to-case thermal resistance and mechanical compatibility with TO-220 footprint layouts. Unlike standard TO-220AB, I²PAK features a smaller outline and optimized thermal pad geometry for PCB-conducted cooling in space-constrained adapter designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - supports input rectification up to 70 V DC or 100 V peak AC in universal-input SMPS front-ends.
I_F(AV)	20 A at T_C = 130 °C - defines continuous DC output current capability when mounted on heatsink.
V_F (typ.)	0.61 V at 20 A, 125 °C - directly reduces conduction loss to ~12.2 W (P ≈ I × V_F) at full load.
R_th(j-c)	1.2 °C/W - enables 20 A operation with ≤24 °C junction-to-case temperature rise under steady-state conditions.
I_FSM	350 A (10 ms sine) - withstands inrush currents during cold-start of 65–90 W AC/DC adapters.
T_j(max)	+150 °C - allows reliable operation in sealed enclosures with ambient temperatures up to +85 °C.
I_R	40 µA at 100 V, 25 °C; 40 mA at 100 V, 125 °C - defines reverse leakage contribution to standby power loss.

Pinout & Package

I²PAK package: 3-terminal surface-mount-compatible outline with isolated tab (anode-connected metal base), epoxy body meeting UL 94 V0, and recommended mounting torque of 0.55 N·m.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Tab)	Main current path anode terminal	Electrically connected to exposed metal tab; must be electrically isolated from heatsink unless circuit design requires common-anode configuration.
Cathode (Lead 1)	Output cathode connection	Soldered to PCB trace carrying rectified output; carries full load current and must be routed with low-inductance layout.
NC / Thermal Pad (Lead 2)	Thermal relief only (no electrical function)	Non-connected lead used solely for mechanical stability and thermal conduction; not tied to any node in schematic.

Key Features

Feature	Design Value
Low forward voltage drop	Reduces conduction loss by ≥30% versus comparable Si diodes, improving efficiency in 12–19 V output adapters.
Avalanche energy rating	1150 W peak (10 µs pulse) enables safe operation during line transients without external snubbers in flyback primary-side rectification.
ECOPACK®2 compliance	Meets RoHS and halogen-free requirements for consumer electronics sold in EU, Japan, and North America.
High-temperature junction rating	+150 °C max operating temperature supports compact thermal design in thermally constrained notebook power bricks.

Applications

Adapter Power Supply

LED Driver Secondary Side

Use Scenario: AC/DC adapter for portable gaming consoles with 12–19 V output and 65–90 W power rating.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback converter.

Use Value: Low V_F maintains >88% efficiency at 20 A load; I²PAK thermal performance avoids derating below 15 A in 40 mm × 40 mm heatsink area.

Use Scenario: Constant-current LED driver for commercial signage using offline flyback topology.

IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in discontinuous conduction mode (DCM) operation.

Use Value: Fast recovery eliminates reverse recovery spikes, reducing EMI filter size; 150 °C T_j rating sustains reliability at 75 °C ambient cabinet temperature.

Desktop PC External PSU

USB-C PD Power Block

Use Scenario: 120 W external power supply for desktop PCs with dual-rail (5 V/12 V) outputs.

IC Role / Device Role / Timing Role: Main output rectifier on 12 V rail delivering up to 10 A continuous.

Use Value: Avalanche rating absorbs reflected surge from 12 V bus short-circuit events; R_th(j-c) = 1.2 °C/W enables direct tab-to-heatsink mounting without thermal interface pads.

Use Scenario: 65 W USB-C Power Delivery brick with variable 5–20 V output via buck-boost regulation.

IC Role / Device Role / Timing Role: Input-stage rectifier feeding PFC + LLC stage in hybrid topology.

Use Value: Low IR at 125 °C ensures <10 mW standby loss at 100 V reverse bias; D²PAK variant (STPS20M100SG-TR) supports automated assembly, but I²PAK (STPS20M100SR) suits manual prototyping and low-volume builds.

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-20CPH05-M3	Same 100 V / 20 A rating; VF = 0.65 V (typ., 20 A, 125 °C); R_th(j-c) = 1.5 °C/W; TO-220AC package.	Larger thermal resistance requires larger heatsink area; non-insulated tab limits isolation flexibility.	Select when cost sensitivity outweighs thermal optimization and isolation needs are minimal.
ON Semiconductor MBR20100CT	20 A dual common-cathode Schottky; VF = 0.75 V (typ., 10 A per diode); TO-220AB package; no avalanche rating.	Dual configuration adds routing complexity; higher VF increases conduction loss by ~23% at 20 A.	Choose only if dual-diode functionality is required and thermal margin permits higher loss.

Compared with VS-20CPH05-M3 and MBR20100CT, STPS20M100SR offers superior thermal performance (1.2 vs. 1.5/2.0 °C/W), lower conduction loss (0.61 vs. 0.65/0.75 V), and guaranteed avalanche ruggedness - making it optimal for compact, high-reliability adapter designs where thermal headroom and transient immunity are critical.

Availability

STPS20M100SR is available at Aetrix Electronics and suitable for notebook adapters, game station power supplies, and LED driver secondary-side rectification requiring stable component supply across production lifecycles.

Supply support for STPS20M100SR 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.

STPS20M100SR belongs to ST's high-efficiency power Schottky rectifier product line, engineered specifically for high-frequency, high-density AC/DC and DC/DC converters in portable and adapter applications.

FAQ

Is STPS20M100SR suitable for synchronous rectification?

No - STPS20M100SR is a passive Schottky rectifier, not a MOSFET-based synchronous rectifier controller or integrated FET device. It lacks gate drive inputs or control logic. For synchronous rectification, ST offers dedicated controllers like SRK1001 or discrete N-channel MOSFETs such as STL120N4LF5.

What is the maximum allowable case temperature for continuous 20 A operation?

The datasheet specifies I_F(AV) = 20 A at T_C = 130 °C for TO-220AB, D²PAK, and I²PAK packages. Therefore, sustained 20 A operation requires maintaining case temperature ≤130 °C - achievable with appropriate heatsinking and airflow, given R_th(j-c) = 1.2 °C/W and T_j(max) = 150 °C.

Does the I²PAK package provide electrical isolation between tab and leads?

Yes - the I²PAK variant (STPS20M100SR) features an insulated tab: the metal base is electrically isolated from the leads, with rated insulation voltage of 2000 V_RMS (sine wave). This enables safe use in isolated topologies without additional insulating hardware.

How does STPS20M100SR compare to standard silicon PN rectifiers in efficiency?

At 20 A and 125 °C, STPS20M100SR's typical V_F of 0.61 V yields ~12.2 W conduction loss, whereas a comparable 100 V/20 A silicon PN rectifier (e.g., 1N5408 derivative) would exhibit V_F ≥1.1 V, resulting in ≥22 W loss - a 45% reduction that directly improves system efficiency and reduces thermal management burden.

STPS20M100SR 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):: 100 V

Current - Average Rectified (Io):: 20A

Voltage - Forward (Vf) (Max) @ If:: 850 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 40 µA @ 100 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: I2PAK

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

STPS20M100SR FAQ

1.How can I place an order for STPS20M100SR through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS20M100SR 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 STPS20M100SR reliable?

The price and inventory of STPS20M100SR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS20M100SR is usually 5 days.

3.What payment methods are accepted for STPS20M100SR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS20M100SR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS20M100SR?

STPS20M100SR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS20M100SR 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 STPS20M100SR?

For technical support, including STPS20M100SR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS20M100SR requirements.

6.How does Aetrix verify that STPS20M100SR is sourced from the original manufacturer or authorized distributors?

All STPS20M100SR 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 STPS20M100SR meets industry standards.

7.What is the process for return or replacement of STPS20M100SR?

All STPS20M100SR units undergo pre-shipment inspection (PSI). If there is an issue with STPS20M100SR, 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 STPS20M100SR part is unused and in its original packaging.

Return procedure for STPS20M100SR:

1.Submit a request within 90 days.

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

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