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

Diodes Incorporated 1N5822-B

Name: 1N5822-B
Brand: Diodes Incorporated
SKU: 1N5822-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5822-B

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: 1N5822-B.pdf

Description:: DIODE SCHOTTKY 40V 3A DO201AD

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Inventory:5,177

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Product details

Overview

1N5822-B from Diodes Incorporated is a 40 V, 3.0 A Schottky barrier rectifier in DO-201AD package, designed for low-voltage, high-frequency rectification in DC/DC converters and polarity protection circuits, with 0.525 V forward voltage at 3.0 A and 80 A non-repetitive surge capability.

For engineers reviewing the 1N5822-B datasheet, 1N5822-B pinout, 1N5822-B application, or 1N5822-B equivalent, key selection criteria include forward voltage drop at rated current, peak reverse voltage margin, thermal resistance (R_JA = 40 °C/W), surge current rating, and DO-201AD mechanical compatibility in high-efficiency power supplies.

Technical Context

This Schottky rectifier uses a guard-ringed die construction to enhance transient immunity and reduce leakage under reverse bias. Its low forward voltage (0.525 V @ 3.0 A) minimizes conduction loss, while the 40 V V_RRM supports 28 V RMS input systems with safety margin.

The device operates across –65 °C to +125 °C junction temperature range and exhibits 2.0 mA peak reverse current at 25 °C and rated blocking voltage. Thermal design relies on lead-mounted PCB layout with 0.5" leads and 63.5 × 63.5 mm copper pad per JEDEC test condition.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse voltage; sets upper limit for safe operation in 28 V RMS AC-input or 36 V DC bus applications.
I_O	3.0 A @ T_L = 95 °C - Continuous average output current; requires thermal management via lead-to-board conduction.
V_FM	0.525 V @ I_F = 3.0 A - Low conduction loss enables >92% efficiency in 5 V output buck converters.
I_FSM	80 A (8.3 ms half-sine) - Supports inrush and fault-current handling without failure in SMPS front-end stages.
R_JA	40 °C/W - Junction-to-ambient thermal resistance measured with vertical P.C.B. mount and specified copper pad; guides heatsinking requirements.
T_j Range	–65 °C to +125 °C - Enables use in automotive under-hood and industrial control environments without derating.

Pinout & Package

DO-201AD axial-leaded plastic package with cathode band marking; body diameter ~7.2–9.5 mm, length ~25.4 mm, lead diameter ~1.2–1.3 mm, lead spacing ~4.8–5.3 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Positive input terminal	Connected to source-side of rectification path; accepts pulsed or continuous forward current up to 3.0 A average.
Cathode (Lead 2, banded end)	Negative output terminal	Delivers rectified DC output; polarity marking ensures correct orientation in series/parallel configurations and reverse-polarity protection circuits.

Key Features

Feature	Design Value
Guard-ringed Schottky die	Reduces peak reverse leakage to 2.0 mA at 25 °C and improves ESD/transient robustness in noisy power rails.
Low V_F at rated current	0.525 V @ 3.0 A lowers conduction loss by ~35% vs. comparable PN-junction rectifiers, reducing thermal load in compact designs.
High surge rating	80 A I_FSM withstands cold-start inrush and short-circuit transients without bond-wire fusing.
UL 94V-0 flammability rating	Molded plastic case meets safety standards for enclosed industrial and consumer power supplies.

Applications

DC/DC Converter Output Rectification

Polarity Protection Circuit

Use Scenario: Secondary-side rectification in 3.3 V/5 V synchronous or asynchronous buck converters operating at 100–500 kHz.

IC Role / Device Role / Timing Role: Unidirectional current path enabling efficient low-V_F energy transfer from transformer or inductor to output capacitor.

Use Value: 0.525 V forward drop reduces power loss to ≤1.6 W at 3.0 A, minimizing thermal stress on PCB layout.

Use Scenario: Reverse-voltage blocking in 12–24 V battery-powered equipment with hot-swap or external power input.

IC Role / Device Role / Timing Role: Passive diode-based protection element placed in series with power input to prevent damage during incorrect battery insertion.

Use Value: 40 V V_RRM provides 16 V headroom above 24 V nominal systems, ensuring reliable blocking under load-dump transients.

Free-Wheeling Diode

Low-Voltage Inverter Stage

Use Scenario: Inductive flyback path in brushed DC motor drivers or solenoid control modules.

IC Role / Device Role / Timing Role: Provides low-loss recirculation path for stored inductive energy during MOSFET turn-off.

Use Value: Fast recovery (inherent to Schottky structure) eliminates reverse recovery charge, preventing switching node ringing and EMI.

Use Scenario: Output stage rectification in 24 V AC-to-DC inverters used in LED signage or small UPS systems.

IC Role / Device Role / Timing Role: Converts high-frequency square-wave AC output from H-bridge into regulated DC using center-tapped or full-wave configuration.

Use Value: 3.0 A average current rating supports continuous 72 W output at 24 V with minimal thermal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB340 (SMC Diode Solutions)	Same DO-201AD package, 40 V V_RRM, but higher V_F = 0.55 V @ 3.0 A and lower I_FSM = 60 A.	Suitable for cost-sensitive, lower-surge applications where 20 A surge margin is acceptable.	Select when board space and footprint match but thermal budget allows slightly higher conduction loss.
SS34 (Vishay)	DO-214AB (SMB) surface-mount package, 40 V V_RRM, V_F = 0.55 V @ 3.0 A, I_FSM = 75 A.	Requires rework of PCB layout; better suited for automated SMT assembly and higher-density power stages.	Choose for new SMT designs prioritizing assembly efficiency over through-hole serviceability.

Compared with SB340 and SS34, the 1N5822-B offers the lowest forward voltage (0.525 V) and highest surge rating (80 A) in the DO-201AD through-hole format, making it optimal for thermally constrained, high-reliability linear or hybrid power supplies requiring field-serviceable components.

Availability

1N5822-B is available at Aetrix Electronics and suitable for DC/DC converter output rectification, polarity protection circuits, free-wheeling diode applications, and low-voltage inverter stages requiring stable component supply and long-term manufacturability.

Supply support for 1N5822-B 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 centers across Asia and manufacturing in Taiwan and China.

The 1N582x series belongs to Diodes' general-purpose Schottky rectifier product line, engineered for high-efficiency, low-voltage power conversion in cost-sensitive industrial and consumer power supplies.

FAQ

What is the maximum junction temperature for continuous operation of the 1N5822-B?

The 1N5822-B has a maximum junction temperature of +125 °C. It must be operated within this limit under all conditions, including ambient temperature, self-heating from forward current, and thermal resistance to ambient or lead. Derating curves in the datasheet specify that average current drops to 0 A at 150 °C lead temperature, confirming strict adherence to the 125 °C T_j ceiling for reliability.

Can the 1N5822-B replace a standard PN-junction rectifier like the 1N4007 in a 24 V power supply?

No - the 1N5822-B is not a direct replacement for the 1N4007 due to its lower peak reverse voltage (40 V vs. 1000 V) and higher leakage current. While it offers superior efficiency at low voltages, it lacks the blocking capability required for 24 V AC-input bridge rectifiers subject to 170 V peak transients. Use only in circuits where reverse voltage remains below 40 V.

Is the 1N5822-B RoHS compliant and halogen-free?

Yes - Diodes Incorporated certifies the 1N5822-B as RoHS compliant and halogen-free per IEC 61249-2-21. The molded plastic case and plated leads meet EU Directive 2011/65/EU and IPC-4101D requirements, with full material declarations available upon request for compliance documentation.

How does the guard ring structure improve reliability in the 1N5822-B?

The guard ring in the 1N5822-B's Schottky die suppresses edge breakdown under high electric field stress, reducing peak reverse leakage to 2.0 mA at 25 °C and improving immunity to voltage transients. This structure extends operational life in noisy industrial environments and prevents premature failure during load-dump events in 24 V systems.

1N5822-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Bulk

Product Status:: Obsolete

Technology:: Schottky

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

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 525 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 2 mA @ 40 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

1N5822-B FAQ

1.How can I place an order for 1N5822-B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5822-B 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 1N5822-B reliable?

The price and inventory of 1N5822-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5822-B is usually 5 days.

3.What payment methods are accepted for 1N5822-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5822-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5822-B?

1N5822-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5822-B 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 1N5822-B?

For technical support, including 1N5822-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5822-B requirements.

6.How does Aetrix verify that 1N5822-B is sourced from the original manufacturer or authorized distributors?

All 1N5822-B 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 1N5822-B meets industry standards.

7.What is the process for return or replacement of 1N5822-B?

All 1N5822-B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5822-B, 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 1N5822-B part is unused and in its original packaging.

Return procedure for 1N5822-B:

1.Submit a request within 90 days.

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

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