SB520 Schottky Diode 20V 5A Equivalent & Substitute Parts

Part Overview

The SB520 is a Schottky rectifier diode rated for 20V DC reverse voltage and 5A average rectified current in a DO-201AD axial through-hole package. Manufactured by onsemi, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts from active manufacturers is necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

SB520

onsemiIn Stock: 2312SB520 Datasheet

Current PartRFQ

SB520E-G

Comchip TechnologyIn Stock: 910SB520E-G Datasheet

DirectRFQ

1N5823

Microchip TechnologyIn Stock: 20901N5823 Datasheet

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SB520-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 11612SB520-E3/54 Datasheet

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SB520_R2_00001

Panjit International Inc.In Stock: 1126SB520_R2_00001 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SB520 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 20V
• Current - Average Rectified (Io): 5A
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: DO-201AD or Axial

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Tolerance range 470–550 mV
• Current - Reverse Leakage @ Vr: Up to 500 µA @ 20V
• Operating Temperature - Junction: Minimum -55°C, Maximum 125–150°C
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

All substitute parts listed maintain the core electrical ratings and through-hole axial package configuration required for direct mechanical and electrical compatibility with the original SB520 design.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement Priority:

SB520-E3/54 (Vishay General Semiconductor - Diodes Division) is the primary recommended substitute. This part maintains identical electrical specifications (20V, 5A, 550 mV forward voltage at 5A), operates across the full temperature range (-65°C to 150°C), and is ROHS3 compliant. The part is available in high inventory (11,502 units) and maintains active product status with established supply chain support.

Secondary Alternatives:

SB520E-G (Comchip Technology) provides full electrical equivalence with 20V, 5A ratings and identical forward voltage characteristics. Operating temperature range is -65°C to 125°C, which covers most industrial applications. ROHS3 compliance and active status support long-term availability.

SB520_R2_00001 (Panjit International Inc.) offers equivalent electrical performance with superior reverse leakage characteristics (200 µA versus 500 µA), beneficial for low-leakage applications. Operating temperature range is -55°C to 125°C. ROHS3 compliant with active product status.

Alternative Consideration:

1N5823 (Microchip Technology) is functionally equivalent with 20V, 5A ratings and fast recovery characteristics. Forward voltage is specified at a different test condition (470 mV @ 15.7 A), indicating potentially superior performance at higher currents. Active product status and bulk packaging availability support high-volume applications.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original SB520 design requirements.

Frequently Asked Questions (FAQ)

Q: Can the SB520E-G replace the SB520 in existing designs?

A: Yes. The SB520E-G maintains identical electrical ratings (20V, 5A) and package configuration (DO-201AD axial). Operating temperature range (-65°C to 125°C) covers standard industrial applications. Verify application temperature requirements do not exceed 125°C if the original design relied on the SB520's 150°C maximum junction temperature.

Q: What is the difference between the SB520-E3/54 and SB520E-G?

A: Both parts are electrically equivalent with 20V, 5A ratings and identical forward voltage (550 mV @ 5A). The primary differences are manufacturer (Vishay versus Comchip), packaging format (Cut Tape versus Tape & Reel), and operating temperature range (Vishay extends to 150°C versus Comchip's 125°C). Select based on temperature requirements and packaging compatibility with assembly processes.

Q: Is the 1N5823 a suitable substitute?

A: The 1N5823 is electrically equivalent with 20V, 5A ratings and fast recovery characteristics. Forward voltage is specified at 470 mV @ 15.7 A, indicating lower forward voltage drop at higher currents. The part is available in bulk packaging and maintains active product status. Verify packaging compatibility, as the 1N5823 is specified as axial without explicit DO-201AD designation.

Q: Why does the SB520_R2_00001 show lower reverse leakage current?

A: The SB520_R2_00001 (Panjit) specifies 200 µA reverse leakage @ 20V, compared to 500 µA for the original SB520. Lower reverse leakage reduces standby current consumption and heat generation in applications sensitive to leakage current. This characteristic makes the Panjit part suitable for low-power or precision applications where leakage minimization is critical.

Q: Are all substitute parts ROHS3 compliant?

A: SB520-E3/54 (Vishay), SB520E-G (Comchip), and SB520_R2_00001 (Panjit) are explicitly ROHS3 compliant. The 1N5823 (Microchip) RoHS status is not specified in the provided data. Verify RoHS compliance documentation with the supplier if regulatory certification is required for your application.

Q: What packaging formats are available for these substitutes?

A: SB520-E3/54 is supplied in Cut Tape (CT) format. SB520E-G and SB520_R2_00001 are supplied in Tape & Reel (TR) format. The 1N5823 is available in bulk packaging. Select based on assembly equipment compatibility and production volume requirements.

Q: Can I use the 1N5823 in high-temperature applications?

A: The 1N5823 operating temperature range is -65°C to 125°C. If your application requires operation above 125°C, use SB520-E3/54 (Vishay), which extends to 150°C and matches the original SB520 temperature specification.