SB320 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SB320 is a Schottky rectifier diode manufactured by onsemi, rated for 20 V DC reverse voltage and 3 A average rectified current in a through-hole DO-201AD axial package. This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity and ensure procurement availability for applications requiring 20 V / 3 A Schottky rectification with fast recovery characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 20 V	µA
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-65°C ~ 125°C	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the SB320 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 20 V
Current - Average Rectified (Io): 3 A
Technology: Schottky
Mounting Type: Through Hole
Package / Case: DO-201AD or compatible axial configuration
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: 475 mV to 500 mV @ 3 A
Current - Reverse Leakage @ Vr: 500 µA to 2 mA @ 20 V
Operating Temperature - Junction: -65°C to -50°C (minimum), 125°C to 150°C (maximum)
Capacitance @ Vr, F: When specified, 180 pF to 250 pF @ 4V, 1MHz

Substitute parts must maintain identical voltage and current ratings, Schottky technology, through-hole mounting, and axial package configuration. Forward voltage and reverse leakage variations within the specified ranges do not affect functional substitution.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
SB320	onsemi	20	3	500 @ 3 A	500 @ 20 V	DO-201AD	-65 ~ 125	Obsolete
1N5820G	onsemi	20	3	475 @ 3 A	2000 @ 20 V	DO-201AA / DO-27	-65 ~ 125	Active
1N5820	Diotec Semiconductor	20	3	850 @ 9.4 A	2000 @ 20 V	DO-201AA / DO-27	-50 ~ 150	Active
1N5820-AP	Micro Commercial Co	20	3	475 @ 3 A	500 @ 20 V	DO-201AD	-55 ~ 125	Active
1N5820-E3/54	Vishay General Semiconductor - Diodes Division	20	3	475 @ 3 A	2000 @ 20 V	DO-201AD	-65 ~ 125	Active
1N5820-E3/73	Vishay General Semiconductor - Diodes Division	20	3	475 @ 3 A	2000 @ 20 V	DO-201AD	-65 ~ 125	Active
1N5820-TP	Micro Commercial Co	20	3	475 @ 3 A	500 @ 20 V	DO-201AD	-55 ~ 125	Active
SB320-E3/54	Vishay General Semiconductor - Diodes Division	20	3	490 @ 3 A	500 @ 20 V	DO-201AD	-65 ~ 150	Active
SB320E-G	Comchip Technology	20	3	500 @ 3 A	500 @ 20 V	DO-201AD	-65 ~ 125	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

1N5820-E3/73 (Vishay General Semiconductor - Diodes Division) and 1N5820-TP (Micro Commercial Co) are direct functional equivalents to the SB320. Both parts maintain identical voltage and current ratings, matching forward voltage characteristics at 3 A, and are available in active product status with RoHS3 compliance and REACH unaffected certification. These parts are suitable for direct replacement in through-hole applications.

SB320-E3/54 (Vishay General Semiconductor - Diodes Division) provides an alternative within the SB320 base product family, offering extended operating temperature range to 150°C maximum junction temperature while maintaining all critical electrical parameters. This part is active status with RoHS3 compliance.

Secondary Substitutes (Acceptable with Verification):

1N5820-AP (Micro Commercial Co) and 1N5820-E3/54 (Vishay General Semiconductor - Diodes Division) are functionally equivalent with slightly reduced reverse leakage specifications (2 mA vs. 500 µA). These parts are active status and RoHS3 compliant. Operating temperature minimum is -55°C for 1N5820-AP, which may require verification for applications requiring -65°C operation.

1N5820G (onsemi) is an active-status equivalent from the original manufacturer. This part is available in bulk packaging and RoHS3 compliant. Reverse leakage specification is 2 mA, which is acceptable for most applications.

Parametric Equivalent:

SB320E-G (Comchip Technology) matches the original SB320 forward voltage specification at 500 mV @ 3 A and reverse leakage at 500 µA @ 20 V. This part is active status, RoHS3 compliant, and available in tape and reel packaging.

Compliance Considerations:

All recommended substitute parts carry RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment with current electronic component standards. The SB320 original part is REACH unaffected with MSL 1 (Unlimited) moisture sensitivity.

Frequently Asked Questions (FAQ)

Q: Can the 1N5820 from Diotec Semiconductor be used as a direct replacement for the SB320?

A: The 1N5820 from Diotec Semiconductor meets the critical electrical parameters (20 V, 3 A, Schottky, fast recovery). However, the forward voltage specification is provided at 9.4 A rather than 3 A, and the operating temperature range extends to 150°C maximum. This part is functionally compatible but requires verification that the forward voltage characteristic at 3 A operating current meets application requirements.

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

A: Both parts are manufactured by Vishay General Semiconductor - Diodes Division and are electrically identical with 20 V, 3 A ratings and 475 mV forward voltage @ 3 A. The designations E3/73 and E3/54 indicate different tape and reel configurations or manufacturing date codes. Both are suitable for direct substitution of the SB320.

Q: Are there packaging differences between substitute parts?

A: Yes. The SB320 is specified in DO-201AD axial package. Most substitute parts (1N5820-E3/73, 1N5820-E3/54, 1N5820-TP, 1N5820-AP, SB320-E3/54, SB320E-G) are also available in DO-201AD or compatible DO-201AA / DO-27 axial configurations. The 1N5820G is available in DO-201AA / DO-27 axial package. All are through-hole mounting and physically compatible with standard PCB layouts designed for axial diodes.

Q: What is the significance of the reverse leakage current variation between 500 µA and 2 mA?

A: Reverse leakage current affects power dissipation and circuit performance at maximum reverse voltage. The SB320 specifies 500 µA @ 20 V. Substitute parts with 2 mA reverse leakage (1N5820G, 1N5820, 1N5820-E3/54, 1N5820-E3/73) have four times higher leakage. For most rectification applications, this variation is acceptable. Applications with stringent leakage requirements should select 1N5820-AP, 1N5820-TP, SB320-E3/54, or SB320E-G, which maintain 500 µA leakage specification.

Q: Which substitute part offers the widest operating temperature range?

A: SB320-E3/54 (Vishay General Semiconductor - Diodes Division) and 1N5820 (Diotec Semiconductor) both extend to 150°C maximum junction temperature, compared to 125°C for the original SB320. SB320-E3/54 is recommended for high-temperature applications while maintaining all other SB320 electrical specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active-status substitute parts listed carry RoHS3 compliance certification. The original SB320 is obsolete and does not carry RoHS3 designation. All substitute parts are REACH unaffected.

Q: What packaging options are available for high-volume procurement?

A: 1N5820-TP (Micro Commercial Co) offers the largest inventory at 13,856 pieces in cut tape packaging. 1N5820-E3/73 (Vishay) provides 4,480 pieces in cut tape. SB320-E3/54 (Vishay) offers 8,259 pieces in cut tape. For bulk packaging, 1N5820G (onsemi) is available with 3,400 pieces.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message