1N5820H Schottky Diode Equivalent & Substitute Parts

Part Overview

The 1N5820H is a 20V, 3A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-201AD axial through-hole packaging. This component is classified as Active product status and carries AEC-Q101 automotive qualification. The 1N5820H is suitable for applications requiring fast recovery rectification with low forward voltage drop characteristics inherent to Schottky technology.

Substitute parts are necessary when the primary part becomes unavailable from inventory, when alternative packaging formats are required, or when design specifications allow for higher current ratings or extended temperature ranges while maintaining core electrical parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	475 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 20 V	µA
Operating Temperature - Junction	-55°C ~ 125°C	°C
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the 1N5820H are classified into two categories based on electrical and mechanical compatibility:

Category 1: Direct Parametric Equivalents (3A Rating) These parts maintain identical reverse voltage (20V), average rectified current (3A), forward voltage drop (475 mV @ 3A), and fast recovery speed characteristics. They are interchangeable in applications where the 3A current specification is a design requirement. Parts in this category include 1N5820-E3/73, SB320-E3/54, and 1N5820-TP. Differences exist in reverse leakage current specifications and operating temperature ranges, which do not affect functional substitution within the stated parameters.

Category 2: Higher Current Rating Substitutes (5A Rating) These parts maintain the 20V reverse voltage and fast recovery speed but provide 5A average rectified current capacity. Parts SB520, SB520-E3/54, and SB520-E3/73 fall into this category. These substitutes are applicable in designs where the circuit can accommodate higher current capability without adverse effects. Forward voltage drop increases to 480-550 mV @ 5A due to the higher current rating.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal 20V
Technology: Must be Schottky
Package / Case: Must be DO-201AD, Axial
Mounting Type: Must be Through Hole
Speed: Must be Fast Recovery ≤ 500ns, > 200mA (Io)

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (Avg Rectified)	Vf (Max) @ If	Reverse Leakage @ Vr	Temp Range (Tj)	Product Status	Packaging
1N5820H	Taiwan Semiconductor Corporation	20V	3A	475 mV @ 3A	500 µA @ 20V	-55°C ~ 125°C	Active	Tape & Reel (TR)
1N5820-E3/73	Vishay General Semiconductor - Diodes Division	20V	3A	475 mV @ 3A	2 mA @ 20V	-65°C ~ 125°C	Active	Cut Tape (CT)
SB320-E3/54	Vishay General Semiconductor - Diodes Division	20V	3A	490 mV @ 3A	500 µA @ 20V	-65°C ~ 150°C	Active	Cut Tape (CT)
1N5820-TP	Micro Commercial Co	20V	3A	475 mV @ 3A	500 µA @ 20V	-55°C ~ 125°C	Active	Cut Tape (CT)
SB520	onsemi	20V	5A	550 mV @ 5A	500 µA @ 20V	-55°C ~ 150°C	Obsolete	Cut Tape (CT)
SB520-E3/54	Vishay General Semiconductor - Diodes Division	20V	5A	480 mV @ 5A	500 µA @ 20V	-65°C ~ 150°C	Active	Cut Tape (CT)
SB520-E3/73	Vishay General Semiconductor - Diodes Division	20V	5A	480 mV @ 5A	500 µA @ 20V	-65°C ~ 150°C	Active	Cut Tape (CT)

Engineering Selection Recommendations

For Direct Replacement (3A Applications): Select 1N5820-TP (Micro Commercial Co) or 1N5820-E3/73 (Vishay) when the 1N5820H is unavailable. Both maintain the 3A current specification and 475 mV forward voltage drop. The 1N5820-TP is preferred for designs with the original -55°C to 125°C temperature range requirement. The 1N5820-E3/73 extends the lower temperature limit to -65°C and is suitable for applications requiring enhanced cold-temperature performance. Both parts are Active product status with ROHS3 compliance and AEC-Q101 qualification path compatibility.

For Extended Temperature Range (3A Applications): Select SB320-E3/54 (Vishay) when operating temperature range extension to 150°C is required while maintaining 3A current capacity. This part accepts a 15 mV increase in forward voltage drop (490 mV @ 3A) and provides -65°C lower temperature limit. Product status is Active with full ROHS3 compliance.

For Higher Current Capacity (5A Applications): Select SB520-E3/54 or SB520-E3/73 (both Vishay) when circuit design permits 5A current handling. Both parts are Active status with -65°C to 150°C operating range. SB520-E3/54 and SB520-E3/73 are functionally equivalent with identical electrical specifications. Forward voltage drop is 480 mV @ 5A, representing a 5 mV improvement over the onsemi SB520 (Obsolete status).

Parts to Avoid: The onsemi SB520 carries Obsolete product status and should not be selected for new designs or long-term supply requirements.

Frequently Asked Questions (FAQ)

Q: Can 1N5820-E3/73 directly replace 1N5820H in all applications? A: Yes, within the specified electrical parameters. Both parts maintain 20V reverse voltage, 3A average rectified current, and 475 mV forward voltage drop. The primary difference is packaging format (Cut Tape vs. Tape & Reel) and reverse leakage current specification (2 mA vs. 500 µA @ 20V). The higher reverse leakage in 1N5820H does not prevent substitution with 1N5820-E3/73.

Q: What is the difference between SB520-E3/54 and SB520-E3/73? A: Both parts are manufactured by Vishay and maintain identical electrical specifications: 20V reverse voltage, 5A average rectified current, 480 mV forward voltage drop @ 5A, and -65°C to 150°C operating range. The suffix designations (-E3/54 and -E3/73) indicate different tape reel configurations or manufacturing date codes. Electrical performance and substitution capability are equivalent.

Q: Can SB520-E3/54 replace 1N5820H in a 3A circuit? A: SB520-E3/54 is rated for 5A average rectified current, which exceeds the 3A requirement of 1N5820H. The part is electrically compatible with 20V reverse voltage and fast recovery speed. However, the forward voltage drop increases to 480 mV @ 5A (compared to 475 mV @ 3A for 1N5820H). Substitution is permissible if the circuit design accommodates the higher current rating and slightly increased forward voltage drop.

Q: Why is SB520 (onsemi) listed if it is Obsolete? A: The onsemi SB520 is included in the substitute parts list for reference and historical documentation purposes. New designs and procurement should not select this part due to Obsolete product status. Active alternatives SB520-E3/54 and SB520-E3/73 from Vishay provide equivalent functionality with ongoing manufacturer support.

Q: What packaging formats are available for 1N5820 equivalents? A: The original 1N5820H is supplied in Tape & Reel (TR) format. Substitute parts are available in Cut Tape (CT) packaging. Both formats contain identical diode components in DO-201AD axial through-hole configuration. Selection between TR and CT depends on assembly process requirements and quantity needs.

Q: Are all listed substitutes RoHS3 compliant? A: Yes, all substitute parts listed carry ROHS3 Compliant status. The 1N5820H also maintains ROHS3 compliance. All parts are REACH Unaffected and classified under ECCN EAR99 for export purposes.

Q: What is the significance of the -55°C to 125°C versus -65°C to 150°C temperature range difference? A: The 1N5820H operates from -55°C to 125°C junction temperature. Substitute parts such as 1N5820-E3/73 and SB320-E3/54 extend the lower limit to -65°C and upper limit to 150°C. Selection depends on application thermal requirements. Extended range parts are suitable for automotive and industrial environments with wider temperature extremes.

Q: Can 1N5820-TP be used as a direct equivalent to 1N5820H? A: Yes, 1N5820-TP (Micro Commercial Co) is a direct parametric equivalent. Both maintain 20V reverse voltage, 3A average rectified current, 475 mV forward voltage drop @ 3A, and -55°C to 125°C operating range. The primary difference is packaging format (Cut Tape vs. Tape & Reel). Electrical performance and substitution capability are identical.

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