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

Diodes Incorporated SBR40U45CT

Name: SBR40U45CT
Brand: Diodes Incorporated
SKU: SBR40U45CT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SBR40U45CT

Manufacturer:: Diodes Incorporated

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: SBR40U45CT.pdf

Description:: DIODE ARRAY SBR 45V 20A TO-220-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:39

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

Product details

Overview

SBR40U45CT from Diodes Incorporated is a 40A dual common-cathode Super Barrier Rectifier (SBR®) with 45V V_RRM, 0.52V max forward voltage at 20A/25°C, and 0.6mA max reverse leakage at 45V/25°C. It serves as a high-efficiency output rectifier in high-current DC-DC converters and AC-DC adapters.

For engineers reviewing the SBR40U45CT datasheet, SBR40U45CT pinout, SBR40U45CT application, or SBR40U45CT equivalent, key selection criteria include its ultra-low VF stability across temperature, rugged avalanche capability versus Schottky diodes, TO-220AB thermal resistance of 2°C/W, and dual-leg 20A-per-leg rating for parallel-path designs.

Technical Context

This dual-diode device integrates two independent SBR® die in a single TO-220AB package with common cathode configuration, enabling synchronous or interleaved rectification topologies. Its patented super barrier structure delivers lower forward voltage than standard Schottkys while maintaining superior high-temperature IR stability and avalanche robustness.

The device operates across –65°C to +150°C junction temperature range and is rated for 280A non-repetitive surge current per leg. Thermal resistance from junction to case is 2°C/W when mounted on a 50×50×23mm aluminum heatsink, supporting high-power density designs without forced air cooling.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - Maximum repetitive reverse blocking voltage per leg; defines safe operating limit in flyback or buck-derived outputs.
I_O (per leg)	20 A - Continuous average forward current per anode leg at 25°C ambient; enables 40A total output with shared cathode.
V_F max	0.52 V @ 20A, 25°C - Ultra-low conduction loss; reduces power dissipation by ~30% vs. comparable Schottky rectifiers.
I_R max	0.6 mA @ 45V, 25°C - Low leakage ensures stable operation in high-temperature environments without thermal runaway risk.
R_θJC	2 °C/W - Junction-to-case thermal resistance; allows direct heatsink mounting for efficient thermal management in compact power supplies.
I_FSM	280 A @ 8.3ms - Surge rating supports inrush and transient overload conditions in industrial and server PSUs.
T_J range	–65°C to +150°C - Wide operating temperature span enables use in automotive under-hood and industrial control applications.

Pinout & Package

Package: TO-220AB - Molded plastic case with matte tin-plated copper leadframe, UL 94V-0 rated, 1.85g weight. Mounting tab is electrically connected to cathode.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode A)	First anode terminal	Independent input path for first rectifier leg; used in dual-output or phase-split configurations.
Pin 2 (Cathode)	Common cathode	Shared output node for both legs; electrically tied to metal tab for low-inductance thermal and electrical return path.
Pin 3 (Anode B)	Second anode terminal	Independent input path for second rectifier leg; enables interleaved or redundant rectification schemes.

Key Features

Feature	Design Value
Patented SBR® technology	Superior avalanche energy handling vs. Schottky diodes-enables reliable operation under voltage transients without clamping circuits.
Ultra-low forward voltage	0.47V typical at 20A/25°C-reduces conduction losses and improves system efficiency in high-current 12V/5V/3.3V DC-DC stages.
Stable high-temp reverse leakage	200µA typical at 45V/125°C-prevents thermal runaway in sealed enclosures or high-ambient environments.
Lead-free & halogen-free	RoHS 2 compliant, <900ppm Br/Cl, <1000ppm Sb-meets global environmental regulations for industrial and consumer end equipment.
TO-220AB mechanical robustness	UL 94V-0 flammability rating and MIL-STD-202 solderable terminals-ensures long-term reliability in automated assembly and harsh thermal cycling.

Applications

Server Power Supply Rectification

Industrial DC-DC Converter Output

Use Scenario: High-current 12V output stage in 1U server PSUs with >80 PLUS Titanium efficiency requirements.

IC Role / Device Role / Timing Role: Dual-leg common-cathode rectifier replacing discrete Schottkys to reduce conduction loss and thermal stress.

Use Value: Enables 0.52V VF at full load, lowering junction temperature rise by ~12°C versus legacy solutions and extending electrolytic capacitor life.

Use Scenario: 24V-to-5V isolated DC-DC module in programmable logic controllers with ambient temperatures up to 70°C.

IC Role / Device Role / Timing Role: Freewheel diode in synchronous rectified forward converter with 200kHz switching frequency.

Use Value: Maintains <0.6mA IR at 45V/25°C and stable leakage at elevated temperature-eliminates need for derating or oversized heatsinks.

AC-DC Adapter Secondary Side

Telecom Brick Power Module

Use Scenario: 19V/4.74A laptop adapter with no-fan design and compact PCB layout.

IC Role / Device Role / Timing Role: Output blocking diode in quasi-resonant flyback topology with tight thermal constraints.

Use Value: 0.47V typical VF minimizes I²R loss in high-duty-cycle operation, improving light-load efficiency and reducing audible noise.

Use Scenario: 48V input telecom brick delivering 12V/30A with dual-phase interleaved LLC resonant conversion.

IC Role / Device Role / Timing Role: Common-cathode dual rectifier per phase for reduced component count and improved current sharing.

Use Value: Shared cathode simplifies PCB routing and lowers parasitic inductance, supporting clean turn-off and EMI compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current super barrier rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-40CPH045	45V V_RRM, 40A total, but uses planar Schottky architecture; VF = 0.55V min at 20A, IR = 1.0mA max at 45V/25°C.	Lacks SBR® avalanche ruggedness; less suitable for unclamped inductive switching or surge-prone inputs.	Prefer SBR40U45CT where transient immunity and thermal stability are critical.
ON Semiconductor MBR4045CT	45V V_RRM, 40A total, standard Schottky; VF = 0.62V typ at 20A, IR = 1.5mA max at 45V/25°C.	Higher conduction loss and leakage; requires larger heatsink or derating above 85°C ambient.	Select SBR40U45CT for higher efficiency and extended temperature margin in space-constrained designs.

Compared with VS-40CPH045 and MBR4045CT, the SBR40U45CT delivers lower VF, tighter IR control at high temperature, and proven avalanche robustness-making it optimal for high-reliability, thermally constrained power conversion where efficiency and ruggedness are co-prioritized.

Availability

SBR40U45CT is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and AC-DC adapters requiring stable component supply, RoHS-compliant packaging, and high-temperature reliability.

Supply support for SBR40U45CT 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The SBR® product line was developed specifically for high-efficiency, high-reliability power rectification in next-generation computing, industrial, and telecom power systems where Schottky limitations in voltage rating and thermal stability are unacceptable.

FAQ

What is the maximum continuous current rating per anode leg?

The SBR40U45CT is rated for 20A average rectified output current per anode leg at 25°C ambient, with a total device rating of 40A due to its dual-leg common-cathode configuration. Derating is required above 25°C per the thermal resistance curve in the datasheet.

Is the metal tab electrically isolated or connected to a terminal?

The metal tab is electrically connected to the common cathode (Pin 2) and must be treated as a live circuit node. It is not isolated and serves as both thermal path and electrical return-requiring appropriate insulation or grounding per board layout and safety standards.

How does SBR® technology differ from standard Schottky rectifiers?

SBR® uses a proprietary super barrier structure that combines Schottky-like low VF with PN-junction-like avalanche capability and high-temperature IR stability. Unlike standard Schottkys, it avoids catastrophic failure under overvoltage transients and maintains leakage below 0.6mA even at 125°C junction temperature.

Can SBR40U45CT replace a single 40A Schottky in a TO-247 package?

No-it is a dual-leg TO-220AB device with two 20A anodes and one shared cathode. Replacing a single-anode 40A Schottky requires verifying circuit topology compatibility; using only one leg sacrifices half the current capacity and wastes thermal mass. It is intended for dual-path or interleaved designs, not drop-in substitution.

SBR40U45CT Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: SBR®

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Diode Configuration:: 1 Pair Common Cathode

Technology:: Super Barrier

Voltage - DC Reverse (Vr) (Max):: 45 V

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

Voltage - Forward (Vf) (Max) @ If:: 520 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 600 µA @ 45 V

Operating Temperature - Junction:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

SBR40U45CT FAQ

1.How can I place an order for SBR40U45CT through Aetrix?

Please submit a Request for Quotation (RFQ) for SBR40U45CT 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 SBR40U45CT reliable?

The price and inventory of SBR40U45CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR40U45CT is usually 5 days.

3.What payment methods are accepted for SBR40U45CT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR40U45CT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SBR40U45CT?

SBR40U45CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SBR40U45CT 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 SBR40U45CT?

For technical support, including SBR40U45CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR40U45CT requirements.

6.How does Aetrix verify that SBR40U45CT is sourced from the original manufacturer or authorized distributors?

All SBR40U45CT 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 SBR40U45CT meets industry standards.

7.What is the process for return or replacement of SBR40U45CT?

All SBR40U45CT units undergo pre-shipment inspection (PSI). If there is an issue with SBR40U45CT, 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 SBR40U45CT part is unused and in its original packaging.

Return procedure for SBR40U45CT:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…