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

Vishay General Semiconductor - Diodes Division SB040-E3/100

Name: SB040-E3/100
Brand: Vishay General Semiconductor - Diodes Division
SKU: SB040-E3/100
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SB040-E3/100

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: MPG06, Axial

Datasheet:: SB040-E3/100.pdf

Description:: DIODE SCHOTTKY 40V 600MA MPG06

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Inventory:8,085

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Product details

Overview

SB040-E3/100 from Vishay Semiconductors is a miniature axial-lead Schottky barrier rectifier rated for 40 V repetitive peak reverse voltage, 0.6 A average forward current, and 20 A non-repetitive surge current, with typical forward voltage of 0.55 V at 0.6 A and reverse leakage of 0.5 mA at 40 V DC blocking. It is used in low-voltage, high-frequency inverters, freewheeling diode circuits, and polarity protection in compact power supplies.

For engineers reviewing the SB040-E3/100 datasheet, SB040-E3/100 pinout (anode/cathode axial leads), SB040-E3/100 application in DC-DC output rectification or reverse-polarity protection, or SB040-E3/100 equivalent for 40 V / 0.6 A Schottky replacement, this page delivers verified electrical specs, thermal derating data, mechanical dimensions, and real-world selection guidance.

Technical Context

The SB040-E3/100 employs a planar-doped, guard-ringed Schottky junction structure to achieve low forward voltage drop and fast switching with no minority-carrier storage delay. Its molded plastic MPG06 case supports axial lead mounting and meets UL 94V-0 flammability rating.

Thermal performance is defined by junction-to-ambient resistance of 80°C/W (PCB-mounted, 0.375" lead length) and junction-to-lead resistance of 20°C/W, enabling operation from –65°C to +125°C junction temperature with derating above 75°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in DC-blocking or flyback clamp applications.
I_F(AV)	0.6 A - Average forward current at 0.375" lead length; defines continuous conduction capability in rectifier or freewheeling roles.
V_F @ 0.6 A	0.55 V typical - Low forward drop reduces conduction loss and improves efficiency in low-voltage (<5 V) output stages.
I_R @ 40 V	0.5 mA max at 25°C - Low leakage preserves battery life and minimizes standby power in always-on circuits.
I_FSM	20 A - Peak surge rating for 8.3 ms half-sine; withstands inrush or transient overloads without failure.
R_θJA	80 °C/W - Thermal resistance determines required PCB copper area or heatsinking for sustained 0.6 A operation.

Pinout & Package

Package: MPG06 - Molded plastic body with solderable axial leads; cathode identified by color band; weight 0.181 g; UL 94V-0 rated.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Current entry point under forward bias	Connected to lower-potential side (e.g., switch node in buck converter or ground return in polarity protection).
Cathode (banded end)	Current exit point under forward bias	Connected to higher-potential side (e.g., output rail or positive input); polarity guard against reverse connection.

Key Features

Feature	Design Value
Guardring overvoltage protection	Enhances ruggedness against voltage transients without external TVS, improving reliability in noisy automotive or industrial environments.
UL 94V-0 plastic package	Meets flame-retardant safety requirements for enclosed consumer and industrial power supplies without additional potting or shielding.
Low 0.55 V forward voltage	Reduces power dissipation to ≤330 mW at 0.6 A, enabling use in space-constrained, unheatsinked designs.
250°C/10 s soldering tolerance	Supports standard wave and reflow processes without lead damage or internal delamination.

Applications

DC-DC Converter Output Rectification	Reverse Polarity Protection
Use Scenario: Secondary-side rectification in 3.3 V or 5 V synchronous or non-synchronous buck converters. IC Role / Device Role / Timing Role: Freewheeling/Schottky rectifier replacing PN diodes to minimize conduction loss and improve efficiency. Use Value: 0.55 V V_F cuts conduction loss by ~40% vs. typical 0.9 V silicon diode, directly increasing light-load efficiency.	Use Scenario: Input protection for USB-powered peripherals or battery-backed modules exposed to accidental reverse connection. IC Role / Device Role / Timing Role: Series-connected blocking diode preventing damage to downstream ICs during miswiring. Use Value: Low 0.55 V forward drop limits voltage loss across protection path, preserving >95% of nominal supply voltage.
High-Frequency Inverter Freewheeling	Low-Voltage AC/DC Adapter Output Stage
Use Scenario: Freewheeling path in 20–100 kHz resonant or PWM inverters for LED drivers or small motor controls. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode handling inductive kickback with minimal reverse recovery charge. Use Value: Zero minority-carrier storage enables clean turn-off at high frequency, eliminating snubber losses and EMI spikes.	Use Scenario: Output rectification in compact wall adapters delivering 5 V/1 A or 12 V/0.5 A with minimal footprint. IC Role / Device Role / Timing Role: Primary output rectifier in transformer-isolated flyback or forward converters. Use Value: Axial MPG06 package fits tight height constraints (<3.2 mm diameter), while 0.6 A rating supports up to 0.5 A continuous load with margin.

DC-DC Converter Output Rectification

Reverse Polarity Protection

Use Scenario: Secondary-side rectification in 3.3 V or 5 V synchronous or non-synchronous buck converters.

IC Role / Device Role / Timing Role: Freewheeling/Schottky rectifier replacing PN diodes to minimize conduction loss and improve efficiency.

Use Value: 0.55 V V_F cuts conduction loss by ~40% vs. typical 0.9 V silicon diode, directly increasing light-load efficiency.

Use Scenario: Input protection for USB-powered peripherals or battery-backed modules exposed to accidental reverse connection.

IC Role / Device Role / Timing Role: Series-connected blocking diode preventing damage to downstream ICs during miswiring.

Use Value: Low 0.55 V forward drop limits voltage loss across protection path, preserving >95% of nominal supply voltage.

High-Frequency Inverter Freewheeling

Low-Voltage AC/DC Adapter Output Stage

Use Scenario: Freewheeling path in 20–100 kHz resonant or PWM inverters for LED drivers or small motor controls.

IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode handling inductive kickback with minimal reverse recovery charge.

Use Value: Zero minority-carrier storage enables clean turn-off at high frequency, eliminating snubber losses and EMI spikes.

Use Scenario: Output rectification in compact wall adapters delivering 5 V/1 A or 12 V/0.5 A with minimal footprint.

IC Role / Device Role / Timing Role: Primary output rectifier in transformer-isolated flyback or forward converters.

Use Value: Axial MPG06 package fits tight height constraints (<3.2 mm diameter), while 0.6 A rating supports up to 0.5 A continuous load with margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB040-E3/54	Same die, identical electrical specs, but supplied in 500-piece tape-and-reel instead of 100-piece bulk (E3/100).	No functional difference; reel format preferred for automated SMT placement where axial leads are adapted via carrier tape.	Select SB040-E3/54 only when using pick-and-place equipment compatible with axial-leaded reels.
SS14-E3/57T	Surface-mount SMA package (vs. axial MPG06); 40 V / 1 A rating; slightly higher V_F (0.55 V min, 0.75 V max at 1 A).	Requires PCB layout change; better suited for high-volume automated assembly but lacks axial mounting flexibility.	Choose SS14-E3/57T only if board space is constrained and SMT process is available; not a drop-in replacement.

Compared with SB040-E3/100, SB040-E3/54 offers identical performance in a different packaging format, while SS14-E3/57T trades axial-mount versatility for SMT compatibility and higher current rating-neither is pin-compatible, but both serve overlapping low-voltage rectification needs with distinct mechanical trade-offs.

Availability

SB040-E3/100 is available at Aetrix Electronics and suitable for DC-DC converter output rectification, reverse polarity protection, and high-frequency inverter freewheeling requiring stable component supply and consistent parametric performance across production lots.

Supply support for SB040-E3/100 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

Vishay Semiconductors is a global leader in discrete semiconductors and passive components, specializing in high-reliability, high-efficiency power devices for industrial, automotive, and computing applications.

The SB040-E3/100 belongs to Vishay's miniature Schottky barrier rectifier family designed specifically for low-loss, high-frequency power conversion in space- and thermally-constrained systems.

FAQ

What is the maximum junction temperature rating for the SB040-E3/100?

The SB040-E3/100 has an operating junction temperature range of –65°C to +125°C. This rating is confirmed in the Vishay Document Number 88714 datasheet under "Maximum Ratings and Thermal Characteristics." Exceeding +125°C risks permanent degradation of the Schottky junction. Derating is required above 75°C ambient per Figure 1 in the SB040-E3/100 datasheet.

Does the SB040-E3/100 have a built-in guardring, and what does it do?

Yes, the SB040-E3/100 incorporates a guardring structure explicitly stated in its Vishay datasheet features. This design enhances edge termination robustness, suppressing premature avalanche breakdown and improving surge immunity-especially critical in inductive load switching or line-transient environments where the SB040-E3/100 is commonly deployed.

Is the SB040-E3/100 RoHS compliant and halogen-free?

Yes, the SB040-E3/100 is RoHS-compliant and halogen-free per Vishay's official product documentation and material declarations. The "E3" suffix denotes Vishay's standard RoHS-compliant, lead-free plating on axial leads, and the molded plastic body contains no brominated flame retardants, satisfying IEC 61249-2-21 requirements.

Can the SB040-E3/100 be used in place of a 1N5817?

The SB040-E3/100 is functionally comparable to the 1N5817 (both 40 V / 1 A Schottky rectifiers), but differs in current rating: SB040-E3/100 is rated for 0.6 A average forward current, whereas 1N5817 is rated for 1 A. Substituting SB040-E3/100 requires verifying that peak/average load current stays ≤0.6 A and that thermal design accommodates its 80°C/W R_θJA.

What is the cathode identification method on the SB040-E3/100?

The cathode of the SB040-E3/100 is marked by a visible color band on the molded plastic body, consistent with industry-standard axial diode polarity marking. This band must be oriented toward the higher-potential node (e.g., output rail or positive supply) during PCB layout or wiring to ensure correct forward conduction and reverse blocking behavior of the SB040-E3/100.

SB040-E3/100 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: MPG06, Axial

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 600mA

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 600 mA

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: MPG06

Operating Temperature - Junction:: -65°C ~ 125°C

SB040-E3/100 FAQ

1.How can I place an order for SB040-E3/100 through Aetrix?

Please submit a Request for Quotation (RFQ) for SB040-E3/100 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 SB040-E3/100 reliable?

The price and inventory of SB040-E3/100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SB040-E3/100 is usually 5 days.

3.What payment methods are accepted for SB040-E3/100?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SB040-E3/100 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SB040-E3/100?

SB040-E3/100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SB040-E3/100 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 SB040-E3/100?

For technical support, including SB040-E3/100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SB040-E3/100 requirements.

6.How does Aetrix verify that SB040-E3/100 is sourced from the original manufacturer or authorized distributors?

All SB040-E3/100 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 SB040-E3/100 meets industry standards.

7.What is the process for return or replacement of SB040-E3/100?

All SB040-E3/100 units undergo pre-shipment inspection (PSI). If there is an issue with SB040-E3/100, 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 SB040-E3/100 part is unused and in its original packaging.

Return procedure for SB040-E3/100:

1.Submit a request within 90 days.

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

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