SB520-T Equivalent & Substitute Parts

Part Overview

The SB520-T is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 20 V DC reverse voltage and 5 A average rectified current in a DO-201AD through-hole axial package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide enhanced or alternative performance characteristics within compatible package and mounting configurations.

Substiute Parts

SB520-T

Diodes IncorporatedIn Stock: 2957SB520-T Datasheet

Current PartRFQ

SB540-T

Diodes IncorporatedIn Stock: 3878SB540-T Datasheet

DirectRFQ

SB520E-G

Comchip TechnologyIn Stock: 910SB520E-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SB520-T is determined by the following criteria:

Parametric Equivalents maintain identical electrical specifications across voltage rating, current capacity, forward voltage drop, reverse leakage current, and thermal operating range. These parts are interchangeable in applications where the original SB520-T specifications are required.

Voltage-Enhanced Substitutes provide higher DC reverse voltage ratings while maintaining all other electrical parameters. These parts are suitable for applications where the circuit design permits operation at higher voltage ratings without functional degradation.

Substitution-Determining Parameters:

• Voltage - DC Reverse (Vr) (Max): 20 V (equivalent) or higher (substitute)
• Current - Average Rectified (Io): 5 A (required)
• Voltage - Forward (Vf) (Max) @ If: 550 mV @ 5 A (required)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (required)
• Current - Reverse Leakage @ Vr: 500 µA (required)
• Package / Case: DO-201AD, Axial (required)
• Mounting Type: Through Hole (required)

Parameter Comparison

Engineering Selection Recommendations

SB520E-G (Comchip Technology) is the parametric equivalent for direct replacement of the SB520-T. This part maintains identical electrical specifications including 20 V DC reverse voltage rating, 5 A current capacity, and 550 mV forward voltage drop. The SB520E-G is currently in active production status, ensuring long-term availability. Both parts are ROHS3 compliant and carry unlimited moisture sensitivity classification. The SB520E-G is supplied in Tape & Reel packaging with 802 units in current inventory.

SB540-T (Diodes Incorporated) functions as a voltage-enhanced substitute where circuit design permits operation at higher voltage ratings. This part maintains identical current and forward voltage specifications while providing 40 V DC reverse voltage rating, double that of the SB520-T. The SB540-T is manufactured by the same original equipment manufacturer as the SB520-T, ensuring design consistency. This part is in active production status with 3800 units in inventory and is ROHS3 compliant.

Selection between equivalent and substitute parts depends on circuit voltage requirements. Applications requiring 20 V operation should utilize the SB520E-G. Applications designed for or tolerant of higher voltage ratings should utilize the SB540-T for enhanced design margin and improved long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the SB520E-G directly replace the SB520-T in all applications?

A: Yes. The SB520E-G maintains identical electrical specifications across voltage rating (20 V), current capacity (5 A), forward voltage drop (550 mV @ 5 A), reverse leakage current (500 µA @ 20 V), and thermal operating range (-65°C ~ 125°C). Both components use the DO-201AD through-hole axial package. Direct substitution is valid for all circuit configurations designed for the SB520-T.

Q: What is the primary difference between the SB540-T and SB520-T?

A: The SB540-T provides a 40 V DC reverse voltage rating compared to the SB520-T's 20 V rating. All other electrical parameters remain identical. The SB540-T is suitable for applications where higher voltage margin is required or beneficial.

Q: Are there packaging differences between these parts?

A: All three parts utilize the DO-201AD through-hole axial package and mounting type. Packaging differences exist only in supplier delivery format: the SB520-T is supplied in standard packaging, the SB540-T in Cut Tape format, and the SB520E-G in Tape & Reel format. These differences do not affect component functionality or circuit performance.

Q: What compliance certifications apply to these parts?

A: All three parts are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited). The SB520-T and SB520E-G are REACH Affected and REACH Unaffected respectively. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: Why is the SB520-T classified as obsolete?

A: The SB520-T is listed as obsolete by the manufacturer. The SB520E-G (parametric equivalent) and SB540-T (voltage-enhanced substitute) are both in active production status and represent current alternatives for procurement and design implementation.