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

Diodes Incorporated 1N5820-T

Name: 1N5820-T
Brand: Diodes Incorporated
SKU: 1N5820-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5820-T

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: 1N5820-T.pdf

Description:: DIODE SCHOTTKY 20V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:3,629

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Product details

Overview

1N5820-T from Diodes Incorporated is a 20 V, 3.0 A Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.475 V @ 3.0 A), high surge capability (80 A), and thermal resistance of 40 °C/W (junction-to-ambient). It is used for polarity protection and free-wheeling in DC-DC converters and low-voltage AC/DC adapters.

For engineers reviewing the 1N5820-T datasheet, 1N5820-T pinout, 1N5820-T application, or 1N5820-T equivalent, key selection criteria include forward voltage drop at rated current, peak repetitive reverse voltage margin, thermal derating behavior above 95 °C lead temperature, and surge current handling under 8.3 ms half-sine conditions.

Technical Context

This Schottky rectifier uses a guard-ringed die construction to suppress transient-induced failure and improve reliability in inductive switching circuits. Its low V_F and fast recovery (<10 ns) stem from majority-carrier conduction, eliminating minority-carrier storage delay.

The device is rated for single-phase, half-wave 60 Hz operation with resistive or inductive loads; capacitive loads require 20% current derating. Thermal performance assumes vertical PCB mounting with 0.500" leads and 2.5" × 2.5" copper pad per JEDEC test condition.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum non-repetitive reverse voltage before breakdown; sets safe operating limit in polarity protection circuits
I_O	3.0 A @ T_L = 95 °C - Continuous average forward current with lead temperature constraint; defines usable DC output capacity
V_FM	0.475 V @ I_F = 3.0 A - Low conduction loss enabling >92% efficiency in 3–5 V output stages
I_FSM	80 A @ 8.3 ms - Withstands inrush and flyback energy surges without failure in motor drive freewheeling
R_JA	40 °C/W - Junction-to-ambient thermal resistance; requires ≥2.5" × 2.5" copper area for full 3.0 A rating at ambient
T_j Range	−65 to +125 °C - Operating junction temperature span compatible with industrial and automotive under-hood environments

Pinout & Package

DO-201AD axial-leaded plastic package with cathode band marking; leads are tin-plated, solderable per MIL-STD-202 Method 208; weight ≈1.1 g; UL 94V-0 flammability rating.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connected to input/source side in rectification; must handle full load current and surge
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output/load side; cathode band orientation ensures correct polarity in PCB layout

Key Features

Feature	Design Value
Guard-ringed Schottky die	Suppresses edge leakage and improves transient immunity during load dump or inductive kick events
Low V_F (0.475 V @ 3 A)	Reduces power dissipation by ~40% vs. comparable PN-junction rectifiers, lowering heatsink requirements
High I_FSM (80 A)	Supports robust operation in flyback snubber networks and brushed DC motor commutation paths
UL 94V-0 molded case	Meets flame-retardancy requirements for enclosed power supplies and industrial control enclosures

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.

IC Role / Device Role / Timing Role: Unidirectional current path with minimal conduction loss to maximize conversion efficiency.

Use Value: 0.475 V forward drop reduces output-stage power loss by 1.4 W vs. 1N540x at 3 A, improving thermal margin.

Use Scenario: Reverse-voltage blocking in USB-powered peripherals and battery-backed modules.

IC Role / Device Role / Timing Role: Cathode-connected to supply rail; anode to load, preventing damage during incorrect connector insertion.

Use Value: 20 V V_RRM provides 2× safety margin over 5 V/12 V systems while maintaining low leakage (<2 mA @ 25 °C).

Free-Wheeling Diode in Relay Drivers

Low-Voltage AC/DC Adapter Output Stage

Use Scenario: Suppressing back-EMF across 12 V/24 V relay coils in PLC I/O modules.

IC Role / Device Role / Timing Role: Provides low-impedance path for coil current decay during de-energization.

Use Value: Fast recovery and 80 A surge rating ensure reliable clamping without voltage overshoot exceeding 30 V.

Use Scenario: Output rectification in wall-adapters supplying 5 V/1 A to IoT sensors and embedded controllers.

IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates at 60 Hz half-wave.

Use Value: DO-201AD package enables through-hole mounting with proven long-term reliability and 1.1 g mass suitable for vibration-prone environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB320-E3/54 (Vishay)	Same DO-201AD package, 20 V V_RRM, but higher V_F (0.52 V @ 3 A) and lower I_FSM (60 A)	Suitable for static rectification but marginal in high-surge relay drivers	Prefer when cost sensitivity outweighs surge margin and efficiency targets
SS32 (ON Semiconductor)	Surface-mount SMA package, same 20 V/3 A rating, V_F = 0.5 V @ 3 A, R_JA = 55 °C/W	Requires PCB rework for SMT assembly; less effective heat spreading than axial DO-201AD	Select only when board space constraints prohibit through-hole components

Compared with SB320-E3/54 and SS32, the 1N5820-T delivers superior surge robustness and lower conduction loss in through-hole designs, making it optimal for industrial relay interfaces and thermally constrained linear-regulated supplies where lead-based thermal sinking is leveraged.

Availability

1N5820-T is available at Aetrix Electronics and suitable for DC-DC converter output rectification, polarity protection circuits, free-wheeling diode applications, and low-voltage AC/DC adapter output stages requiring stable component supply and long-lifecycle support.

Supply support for 1N5820-T 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 US.

The 1N5820-T belongs to Diodes' general-purpose Schottky rectifier product line, engineered for high-efficiency, low-voltage power conversion and protection in cost-sensitive industrial and consumer power supplies.

FAQ

What is the maximum allowable lead temperature for continuous 3.0 A operation?

The 1N5820-T supports 3.0 A average forward current only when the lead temperature (T_L) is held at or below 95 °C, as verified by measurement at 9.5 mm from the case. Exceeding this temperature requires linear derating per Figure 1 in the datasheet, reaching zero current at 150 °C lead temperature.

Does the 1N5820-T have a specified reverse recovery time?

No-Schottky barrier rectifiers like the 1N5820-T operate via majority-carrier conduction and exhibit no minority-carrier storage delay. Its effective switching is limited only by junction capacitance (≈100 pF at 0 V, per Figure 4) and circuit inductance, enabling sub-10 ns turn-off in practical layouts.

Can the 1N5820-T be used in full-wave bridge configurations?

Yes-it is commonly used as one leg in discrete full-wave bridges, though its 20 V V_RRM limits use to low-input-voltage applications (e.g., ≤14 V AC secondary). For higher AC inputs, 1N5821 (30 V) or 1N5822 (40 V) variants are recommended to maintain adequate reverse voltage margin.

Is the DO-201AD package RoHS compliant and lead-free?

Yes-the 1N5820-T is manufactured with lead-free terminations and complies with RoHS Directive 2011/65/EU. The tin-plated leads meet J-STD-020 moisture sensitivity level (MSL) 1 and are rated for standard reflow and wave soldering processes per MIL-STD-202 Method 208.

1N5820-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 20 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 475 mV @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 2 mA @ 20 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

1N5820-T FAQ

1.How can I place an order for 1N5820-T through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5820-T 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 1N5820-T reliable?

The price and inventory of 1N5820-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5820-T is usually 5 days.

3.What payment methods are accepted for 1N5820-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5820-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5820-T?

1N5820-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5820-T 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 1N5820-T?

For technical support, including 1N5820-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5820-T requirements.

6.How does Aetrix verify that 1N5820-T is sourced from the original manufacturer or authorized distributors?

All 1N5820-T 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 1N5820-T meets industry standards.

7.What is the process for return or replacement of 1N5820-T?

All 1N5820-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N5820-T, 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 1N5820-T part is unused and in its original packaging.

Return procedure for 1N5820-T:

1.Submit a request within 90 days.

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

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