SB220-AP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SB220-AP is a 20V, 2A Schottky rectifier diode manufactured by Micro Commercial Co in a through-hole DO-15 package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The part remains in stock with 704 units available. Due to its obsolescence classification, identifying functionally equivalent substitute parts is necessary for ongoing maintenance, repair, and legacy system support where this diode is currently deployed.

Substiute Parts

SB220-AP

Micro Commercial CoIn Stock: 732SB220-AP Datasheet

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SB220E-G

Comchip TechnologyIn Stock: 725SB220E-G Datasheet

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SR202 A0G

Taiwan Semiconductor CorporationIn Stock: 932SR202 A0G Datasheet

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SR202 B0G

Taiwan Semiconductor CorporationIn Stock: 1114SR202 B0G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SB220-AP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 20V
• Current - Average Rectified (Io): 2A
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: DO-15 or DO-204AC (axial configuration)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Up to 550 mV @ 2 A (SB220-AP specifies 500 mV maximum)
• Current - Reverse Leakage @ Vr: 500 µA @ 20 V (consistent across all parts)
• Operating Temperature - Junction: May vary within functional range

All identified substitute parts meet the mandatory matching criteria. Variations in forward voltage and operating temperature range are within acceptable engineering tolerances for this diode category.

Parameter Comparison

Engineering Selection Recommendations

SB220E-G (Comchip Technology) is the primary substitute for the SB220-AP. This part shares identical electrical specifications including forward voltage (500 mV @ 2 A) and maintains the same base product number (SB220). The SB220E-G carries Active product status and ROHS3 compliance, making it suitable for new production environments while serving as a direct replacement in legacy applications. The operating temperature range is reduced to -65°C ~ 125°C compared to the SB220-AP's -65°C ~ 150°C; this difference is acceptable for most industrial and commercial applications.

SR202 A0G and SR202 B0G (Taiwan Semiconductor Corporation) are functionally equivalent alternatives. Both parts meet all mandatory electrical parameters with forward voltage specifications of 550 mV @ 2 A, which is within acceptable tolerance for Schottky diode applications. Both carry Active product status and ROHS3 compliance. The operating temperature range is -55°C ~ 125°C, which is narrower than the SB220-AP but suitable for standard operating environments. These parts are available in higher inventory quantities (880 and 1069 units respectively), providing supply security.

All three substitute parts are through-hole axial diodes in DO-15/DO-204AC packages, ensuring mechanical and electrical compatibility with existing PCB layouts and circuit designs using the SB220-AP.

Frequently Asked Questions (FAQ)

Q: Can the SB220E-G directly replace the SB220-AP in existing circuits?

A: Yes. The SB220E-G meets all mandatory electrical parameters: 20V reverse voltage, 2A average rectified current, 500 mV forward voltage @ 2A, and fast recovery speed. Both parts use identical through-hole DO-15 packaging. The reduced upper operating temperature limit (-65°C ~ 125°C versus -65°C ~ 150°C) is acceptable for standard applications.

Q: What is the difference between the SB220E-G and the SR202 variants?

A: The SB220E-G maintains the SB220 base product number and matches the original forward voltage specification (500 mV @ 2 A). The SR202 A0G and SR202 B0G have a higher forward voltage specification (550 mV @ 2 A) but are electrically equivalent for circuit operation. All three parts share identical reverse voltage, current rating, and recovery speed characteristics.

Q: Are there packaging differences between these substitute parts?

A: All substitute parts are through-hole axial diodes in DO-15 or DO-204AC packages. These packages are mechanically and electrically interchangeable. The SB220E-G is supplied in Tape & Reel packaging, while the SR202 variants do not specify packaging format in the provided data. For PCB assembly, all parts are compatible with standard through-hole soldering processes.

Q: Why is the SB220-AP marked "Not For New Designs"?

A: This classification indicates the part has reached end-of-life status with the manufacturer. While 704 units remain in stock, Micro Commercial Co no longer recommends this part for new product development. The substitute parts listed—particularly the SB220E-G and SR202 variants—are Active products with ongoing manufacturer support and are appropriate for both legacy system maintenance and new designs.

Q: Do the substitute parts meet compliance requirements?

A: Yes. All substitute parts carry ROHS3 compliance and REACH Unaffected status, matching the regulatory requirements of the SB220-AP. These certifications ensure compatibility with modern manufacturing and environmental standards.

Q: What is the impact of the forward voltage difference between SB220E-G (500 mV) and SR202 variants (550 mV)?

A: The 50 mV difference in forward voltage is within normal Schottky diode tolerance and does not affect circuit functionality in standard rectification applications. This variation results in negligible differences in power dissipation and thermal performance for typical 2A operating conditions.