1N5820 Schottky Diode Equivalent & Substitute Parts

Part Overview

The 1N5820 is a through-hole Schottky rectifier diode rated for 20 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial package. This component is classified as obsolete in its original onsemi form, necessitating identification of active equivalent and substitute parts from alternative manufacturers. Equivalent parts maintain identical electrical specifications and mechanical compatibility, while substitute parts satisfy the same functional requirements within defined parameter tolerances.

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 @ A
Technology	Schottky	—
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-65°C to 125°C	°C

Substitute Part Grouping Explanation

Substitution of the 1N5820 is determined by the following critical parameters:

Electrical Specifications:

Voltage - DC Reverse (Vr) (Max): 20 V minimum
Current - Average Rectified (Io): 3 A minimum
Voltage - Forward (Vf) (Max) @ If: 475 mV or lower at 3 A
Technology: Schottky
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Mechanical Specifications:

Mounting Type: Through Hole
Package / Case: DO-201AD or equivalent axial package (DO-201AA, DO-27)

Environmental & Compliance:

Operating Temperature - Junction: -65°C to 125°C minimum range
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Parts are grouped into three categories:

Direct Manufacturer Equivalents: Identical part numbers from alternative manufacturers with matching electrical and mechanical specifications.

Parametric Equivalents: Parts with identical base specifications but different packaging or leakage characteristics that remain functionally compatible.

Similar Substitutes: Parts with equivalent voltage and current ratings but minor variations in forward voltage or leakage current that remain within acceptable operating parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV @ A]	Package / Case	Mounting Type	Tj (°C)	Product Status	Packaging
1N5820	onsemi	20	3	475 @ 3	DO-201AD, Axial	Through Hole	-65 to 125	Obsolete	Cut Tape (CT)
1N5820G	onsemi	20	3	475 @ 3	DO-201AA, DO-27, Axial	Through Hole	-65 to 125	Active	Bulk
1N5820-AP	Micro Commercial Co	20	3	475 @ 3	DO-201AD, Axial	Through Hole	-55 to 125	Active	Bulk
1N5820-TP	Micro Commercial Co	20	3	475 @ 3	DO-201AD, Axial	Through Hole	-55 to 125	Active	Cut Tape (CT)
1N5820-E3/54	Vishay General Semiconductor - Diodes Division	20	3	475 @ 3	DO-201AD, Axial	Through Hole	-65 to 125	Active	Cut Tape (CT)
1N5820-E3/73	Vishay General Semiconductor - Diodes Division	20	3	475 @ 3	DO-201AD, Axial	Through Hole	-65 to 125	Active	Cut Tape (CT)
SB320-E3/54	Vishay General Semiconductor - Diodes Division	20	3	490 @ 3	DO-201AD, Axial	Through Hole	-65 to 150	Active	Cut Tape (CT)
SB320-E3/73	Vishay General Semiconductor - Diodes Division	20	3	490 @ 3	DO-201AD, Axial	Through Hole	-65 to 150	Active	—
SB320_R2_00001	Panjit International Inc.	20	3	500 @ 3	DO-201AD, Axial	Through Hole	-55 to 125	Active	Tape & Reel (TR)
1N5820	Diotec Semiconductor	20	3	850 @ 9.4	DO-201AA, DO-27, Axial	Through Hole	-50 to 150	Active	—

Engineering Selection Recommendations

Primary Selection Criteria:

Product Status: Active parts are preferred over obsolete parts. The original 1N5820 from onsemi is obsolete; therefore, active equivalents from Vishay (1N5820-E3/54, 1N5820-E3/73) or Micro Commercial Co (1N5820-TP, 1N5820-AP) are recommended for new designs and production continuity.
Compliance & Certifications: All recommended substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory requirements.
Packaging Compatibility: For direct mechanical and electrical interchange, select parts with DO-201AD package designation. Parts with DO-201AA or DO-27 packages are mechanically compatible but may require board layout verification.
Temperature Range: Parts rated -65°C to 125°C (1N5820-E3/54, 1N5820-E3/73, SB320-E3/54, SB320-E3/73) provide full compatibility with the original specification. Parts rated -55°C to 125°C (1N5820-AP, 1N5820-TP, SB320_R2_00001) are suitable for applications not requiring the extended lower temperature range.
Forward Voltage Tolerance: Parts with Vf (Max) of 475 mV @ 3 A (1N5820G, 1N5820-AP, 1N5820-TP, 1N5820-E3/54, 1N5820-E3/73) provide exact specification match. Parts with Vf (Max) of 490 mV @ 3 A (SB320-E3/54, SB320-E3/73) or 500 mV @ 3 A (SB320_R2_00001) are acceptable substitutes with slightly higher forward voltage drop.
Packaging Format: Cut Tape (CT) packaging is suitable for automated assembly. Bulk and Tape & Reel (TR) packaging options are available for different procurement and assembly workflows.

Not Recommended: The ZHCS750TA (Diodes Incorporated) operates at 40 V / 750 mA in a surface-mount SOT-23-3 package and is not suitable as a substitute due to different voltage rating, current rating, mounting type, and package form factor.

Frequently Asked Questions (FAQ)

Q: Can I use 1N5820-E3/73 as a direct replacement for the obsolete 1N5820 from onsemi?

A: Yes. The 1N5820-E3/73 from Vishay General Semiconductor - Diodes Division is a parametric equivalent with identical voltage (20 V), current (3 A), forward voltage (475 mV @ 3 A), and package specifications (DO-201AD, Through Hole). It is active in production and ROHS3 compliant.

Q: What is the difference between 1N5820-E3/54 and 1N5820-E3/73?

A: Both parts are from Vishay and share identical electrical specifications (20 V, 3 A, 475 mV @ 3 A) and package type (DO-201AD). The primary difference is the packaging format: 1N5820-E3/54 is supplied in Cut Tape (CT), while 1N5820-E3/73 is supplied in an unspecified format. Both are suitable for direct substitution.

Q: Can I substitute the 1N5820 with SB320-E3/54?

A: Yes. The SB320-E3/54 meets all critical electrical parameters (20 V, 3 A) and mechanical requirements (DO-201AD, Through Hole). The forward voltage is slightly higher at 490 mV @ 3 A compared to 475 mV @ 3 A, but this remains within acceptable operating tolerance. The extended temperature range (-65°C to 150°C) provides additional thermal margin.

Q: Why is ZHCS750TA listed but not recommended?

A: The ZHCS750TA is a surface-mount Schottky diode with different electrical ratings (40 V, 750 mA) and a different package type (SOT-23-3). It is not mechanically or electrically compatible with the through-hole DO-201AD 1N5820 and cannot serve as a substitute.

Q: What is the impact of using a part with higher forward voltage, such as SB320_R2_00001 (500 mV @ 3 A)?

A: Higher forward voltage results in increased power dissipation in the diode. For a 3 A application, the difference between 475 mV and 500 mV represents an additional 75 mW of dissipation. This is acceptable in most applications but should be verified in power-sensitive designs. Thermal management and circuit performance should be evaluated.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed in this document are ROHS3 compliant and REACH Unaffected, matching the regulatory status of the original 1N5820.

Q: Can I use 1N5820-AP for applications requiring the full -65°C to 125°C temperature range?

A: The 1N5820-AP is rated -55°C to 125°C, which does not cover the full lower temperature range of the original specification (-65°C to 125°C). For applications requiring operation below -55°C, use 1N5820-E3/54, 1N5820-E3/73, SB320-E3/54, or SB320-E3/73 instead.

Q: What packaging options are available for the 1N5820 equivalent parts?

A: Packaging options include Cut Tape (CT) for automated assembly, Bulk for manual assembly or reel winding, and Tape & Reel (TR) for high-volume automated production. Select based on your assembly process and procurement requirements.

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