S2A General Purpose Rectifier Diode - Equivalent & Substitute Parts

Part Overview

The S2A is a general purpose rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 1.5 A average rectified current in a Surface Mount SMB (DO-214AA) package. This component is classified as obsolete, indicating discontinuation from the original manufacturer. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

S2A

Diodes IncorporatedIn Stock: 931S2A Datasheet

Current PartRFQ

S2M_HF

Diodes IncorporatedIn Stock: 1165S2M_HF Datasheet

MFR RecommendedRFQ

CGRB201-G

Comchip TechnologyIn Stock: 20356CGRB201-G Datasheet

SimilarRFQ

S2A

Diotec SemiconductorIn Stock: 7018S2A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S2A (Diodes Incorporated) is determined by electrical and mechanical compatibility within the following framework:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) rating must equal or exceed the original specification (50 V minimum)
• Current - Average Rectified (Io) rating must equal or exceed the original specification (1.5 A minimum)
• Voltage - Forward (Vf) characteristics must be compatible with circuit design parameters
• Reverse Recovery Time (trr) and leakage current must fall within acceptable operating ranges

Mechanical Compatibility Criteria:

• Package / Case must be DO-214AA or SMB equivalent
• Mounting Type must be Surface Mount
• Physical dimensions must be compatible with existing PCB layouts

Compliance Criteria:

• RoHS3 compliance required
• REACH compliance status must be documented

Substitute parts are classified into two categories: MFR Recommended (manufacturer-endorsed alternatives) and Similar (functionally equivalent from alternative manufacturers).

Parameter Comparison

Engineering Selection Recommendations

MFR Recommended Substitute: S2M_HF (Diodes Incorporated)

The S2M_HF is the manufacturer-recommended alternative to the obsolete S2A from Diodes Incorporated. This part maintains identical electrical characteristics at the rated current level (1.15 V forward voltage at 1.5 A, 1.5 µs reverse recovery time) and identical operating temperature range (-55 to 150 °C). The S2M_HF features an elevated voltage rating of 1000 V, providing enhanced voltage margin for circuit protection. The part is in active production status with ROHS3 compliance and maintains the same DO-214AA SMB package footprint. This substitute is suitable for direct replacement in applications where the original 50 V rating is adequate.

Similar Substitutes: CGRB201-G (Comchip Technology) and S2A (Diotec Semiconductor)

Both CGRB201-G and S2A (Diotec) are functionally equivalent alternatives with the following characteristics:

• Both maintain the 50 V DC reverse voltage rating
• Both are rated for current capacity equal to or exceeding the original specification (2 A versus 1.5 A original)
• Both utilize the DO-214AA SMB package with Surface Mount configuration
• Both are in active production status with ROHS3 compliance
• Both maintain reverse leakage current of 5 µA at 50 V

The CGRB201-G (Comchip) is supplied in Tape & Reel packaging with Moisture Sensitivity Level 1 (Unlimited). The S2A (Diotec) is supplied with standard packaging and has REACH information available upon request. Both parts are suitable for applications requiring the original 50 V / 1.5 A specification with enhanced current margin.

Frequently Asked Questions (FAQ)

Q: Can the S2M_HF (1000 V rating) be used in place of the original S2A (50 V rating)?

A: Yes. The S2M_HF maintains identical electrical performance at the 1.5 A rated current level and identical forward voltage characteristics. The elevated voltage rating provides additional circuit protection margin without affecting performance in 50 V applications. The part is in active production and is the manufacturer-recommended substitute.

Q: What is the difference between the CGRB201-G and S2A (Diotec) substitutes?

A: Both parts meet the original 50 V / 1.5 A specification with identical package configuration (DO-214AA SMB). The primary differences are: CGRB201-G is supplied in Tape & Reel packaging with MSL 1 rating; S2A (Diotec) is supplied with standard packaging. Both are in active production with ROHS3 compliance. Selection between these parts depends on packaging requirements and supply chain availability.

Q: Are all substitute parts compatible with the original PCB layout?

A: Yes. All substitute parts utilize the DO-214AA SMB package with identical Surface Mount configuration. Physical footprint compatibility is maintained across all listed substitutes.

Q: What compliance certifications apply to the substitute parts?

A: All substitute parts listed are ROHS3 compliant. The S2M_HF and CGRB201-G have confirmed REACH Unaffected status. The S2A (Diotec) has REACH information available upon request. All parts carry EAR99 ECCN classification.

Q: Can the higher current-rated substitutes (2 A) be used in circuits designed for 1.5 A?

A: Yes. Parts rated for higher current capacity are suitable for applications requiring lower current. The 2 A rated substitutes (CGRB201-G and S2A from Diotec) operate within specification at 1.5 A and below.

Q: What is the operating temperature range for each substitute?

A: S2M_HF and original S2A (Diodes): -55 to 150 °C. CGRB201-G: maximum 150 °C (minimum not specified). S2A (Diotec): -50 to 150 °C. All parts are suitable for standard industrial temperature ranges.